eChapters

Consumption of fruit and vegetables has dramatically increased globally during the past a few decades. These are living perishable biological entities which perform a number of metabolic functions and have a short life span. Once the fruit is harvested, respiration and transpiration continue, but only for as long as the fruit can draw on its own food reserves and moisture. It is this limited ability to continue vital metabolic functions which define fruit as perishable. It is also estimated that about 20% of all fruits and vegetables produced are lost each year due to spoilage. The process of the fruit spoilage is just the decomposition of the fruit itself. Once harvested, this begins to deteriorate until eventually it becomes unfit for consumption. This deterioration is known as decay and that leads to spoilage. Latter may be defined as “any sensory change (physical, visual, olfactory or flavour) which the consumer considers to be unacceptable. The gradual changes which cause deterioration and decay in fruits are due to certain organisms and chemicals present in the food and outside the food. Carbohydrates play a major role in the fruit spoilage process (Prasanna et al., 2007) by way of depolymerization leading to decreased molecular size with concomitant increase in the levels of ripening inducing specific enzymes, whose target differ from fruit to fruit. The major classes of cell wall polysaccharides that undergo modifications during ripening are pectins, cellulose, starch, and hemicelluloses (Hallet et al., 2005). The focus of this chapter is to provide information about carbohydrate metabolism during fruit spoilage.

Sustainability refers to productive performance of a system over time. It implies use of natural resources to meet the present needs without jeopardizing the future potential. The Technical Advisory Committee of the Consultative Group of International Agricultural Research has defined sustainability as “Successful management of resources for agriculture to satisfy changing human needs while maintaining or enhancing the quality of the environment and conserving natural resources” (TAC, 1989). A sustainable system must be sustainable both ecologically and economically.

During the past several decades, production of horticultural crops has undergone a tremendous change in both developed and developing countries due to the development and use of fertilizers, pesticides, mechanization, soil fumigation, container production in soil-less media, breeding, micropropagation, pathogen elimination and a number of other innovations for attaining its future stability and sustainability. Recently, in modern horticulture, enhanced productivity depends heavily on inputs of fertilizers and pesticides to maintain an economic level of productivity. On the other hand, social and economic pressures are demanding that agricultural/horticultural practices, that have a damaging impact on the environment and pose risk to health of mankind, be curtailed. Thus throughout the world, agriculture including horticulture is at crossroads in terms of its future stability and sustainability. The solution for the above lies in developing new technology with reduced use of fertilizer and pesticides besides maintaining a sustainable level of productivity. The increased concern about the sustainability and undesirable side-effects of chemistry-based agriculture is prompting many researchers to more seriously evaluate alternative approaches. One such effort was put forth in the management of microbes that live in the rhizosphere soil around the roots of nearly all terrestrial plants. It has been believed that the main orchestrators of microbial activity in the rhizosphere are mycorrhizal fungi.

The harmony between human beings and plants is one of the evergreen reasons that maintains and supports life on earth. This fact clearly explains why any hazard to the life of plants prominently affects man. One important feature distinguishing plants from other complex multicellular organisms is that plants are sessile and thus have to endure environmental challenges (Zhu, 2001).

Crop productivity is limited by stress factors. The stresses which pose major threats to survival of plants belong to two categories- abiotic and biotic stress. Drought, salinity, high or low temperatures, light, deficient or excess nutrients, heavy metals, pollutants etc., either individually or in combination causes abiotic stresses. Biotic stress refers to any stress provided by living organisms, be it unicellular or multicellular. Plants facing a variety of biotic and abiotic stresses are able to protect themselves by means of tolerance mechanisms which result from changes at the molecular level. They are often confronted by a multitude of stresses in their natural environment. To overcome this, plants have evolved various defence strategies, which involve comprehensive reprogramming of the cellular metabolism.

Understanding biology and genetics at molecular level has become very important for better understanding and manipulation of genome architecture and this creates new opportunities to streamline plant breeding. Breeding is simply defined as the selective mating of individuals of a population to isolate or combine desired morphological, physiological or genetic traits such as appearance, yield, and disease resistance. This is performed with the assistance of identifiable traits.

Molecular markers have contributed significantly in this respect and have been widely used in plant science in a number of ways, including genetic fingerprinting, diagnostics, identification of duplicates and selecting core collections, determination of genetic distances, genome analysis, identification of markers associated with desirable breeding traits which are useful in marker assisted breeding, genomics and development of transgenics. Use of these markers also significantly reduces breeding time and cycles required for crop improvement. This is reflected in the fact that complete molecular and genetic maps have now been constructed for at least 20 major crop species and many more have been characterized at less defined level and the genomes of a few model plant species were completely sequenced.

Climate Change: Understanding our Earth and Atmosphere

Our Mother Earth is the fifth largest planet in the solar system and the third from the sun. It is also the sole planet whose name comes from old English language only, and not from names of any other celestial bodies, whose names originated mostly from Greek/Roman mythology. Earth has a diameter of 6378 km, of which the earth crust (uppermost skin) is only 24 km. Earth is the only planet where water exists as liquid and 71% of its surface is covered by water. The earth’s atmosphere is made up mostly of nitrogen (77%) and oxygen (21%) gases. CO₂ consists of a very small (trace) fraction (0.03%) of atmosphere, but is most vital for the life cycle. When earth was created, it has got much higher CO₂ than today, and all of them have been sequestered in rocks as carbonates and dissolved in oceans and a negligible amount is distributed in plant communities. This extremely small quantity of CO₂ is keeping life on earth, by maintaining earth’s temperature at a comfortable 14°C (without CO₂, earth’s temperature would have been -21°C). This effect is called the ‘greenhouse effect’, revolving which all issues of climate change exist. It is also to be noted that water vapour is also an important greenhouse gas (GHG). It is to also to be noted that in spite of substantial increase in solar constant, earth’s average temperature has remained stable for billions of years. It is understood that this was possible through variation in CO₂, and it is the biological processes (Earth biosphere) that controlled the environment over years (Gaia hypothesis).

In this era of molecular markers in genetic studies, genome analysis encompasses several stages of increasing resolution and sophistication, leading to the generation of high resolution chromosome maps. Since the entire plant kingdom cannot be covered under sequencing projects, molecular markers and their correlation to phenotypes provide us with requisite landmarks for elucidation of genetic variation.

A molecular marker is a site of heterozygosity for some type of DNA variation. Such a DNA marker in mapping analysis is analogous to a conventional heterozygous allelic pair. When they are used for mapping the genome, the identity of this DNA fragment is not important, but is simply used as a reference point to arrange and order the genetic information along the length of a chromosome. The molecular markers provide landmarks along the length of chromosome that facilitate the manipulation of chromosome segments in breeding and chromosome engineering programs.

Delineating species boundaries correctly and also identifying species are crucial to the discovery of life’s diversity because it determines whether different individual organisms are members of the same entity or not (Dayrat, 2005). The identification of species depends on the knowledge held by taxonomists whose work cannot cover all taxon identification requested by non-specialists. To deal with these difficulties, the ‘DNA Barcode of Life’ project aims to develop a standardized, rapid and inexpensive species identification method accessible to non-taxonomists.

DNA barcoding is a technique in which species identification is performed by determining and comparing the sequences of several hundred base pairs of nucleotides from a small fragment of an identified gene, with the aim of contributing to a wide range of ecological and conservation studies in which traditional taxonomic identification is not practical (Krishnamurthy and Francis, 2012). The two main ambitions of DNA barcoding are to assign unknown specimens to species and to enhance the discovery of new species and facilitate identification, particularly in cryptic, microscopic and other organisms with complex or inaccessible morphology (Hebert et al., 2003a). Apart from these, identification of species previously defined by other criteria to also is an objective of barcoding. Another major objective could be the definition of operational units for ecological studies. This may also be used for forensic purposes by linking the specimens with already identified databases.

Ethylene is a primary plant hormone involved in the senescence of plant tissues including flowers and leaves. In carnation, inhibition of the synthesis or action of ethylene delays the onset of senescence symptoms and lengthens the vase life of flowers. Leaves of cut chrysanthemum of some cultivars frequently become yellow, sometimes prior to onset of flower senescence, in response to exogenous ethylene. Generation of transgenic plants with suppressed production or action of ethylene is an excellent way to lengthen the longevity of these ornamental plants. This paper reviews our studies on generation and characterization of carnations with reduced ethylene production and chrysanthemum with reduced sensitivity to ethylene.

Ethylene is a primary plant hormone involved in the senescence of cut flowers of many ornamentals such as carnation, sweetpea and delphinium. It is produced on a large amount at a later stage of flower senescence. The increased ethylene production accelerates withering and dropping of petals. Inhibition of synthesis or action of ethylene delays the onset of senescence symptoms and extends the vase life of flowers.

The frequency distribution of the populations of M₂ and M₃ generation for each genotype was extracted according to Panse and Sukhatme (1961). Skewness and Kurtosis for all the characters were calculated as per the standard method. Skewness refers to the symmetry of the frequency distribution. A measure of skewness is obtained as making use of the second and their moments about the mean. It is defined as,

Polygenic characters exhibit a wide range of expression but the action of genes may be either additive or non-additive. According to Fisher et al. (1932), Smith (1936) Lush (1945), Panse (1946) and Mather (1949) the genetic advance can be achieved through selection of the heritable variation in only due to additive. So, selection for a particular character based on phenotypic variability without estimating the heritable part of it will not be successful. Heritability estimates along with genetic advance are normally more helpful in predicting the gain under selection than heritability estimates alone (Singh, 1997). Therefore, the heritability enters into every formula connected with breeding methods and many practical decisions are taken considering the heritability value.

Knowledge on genetic variability of the available population is very essential for any crop improvement programme, as it will positively enhance the efficiency of selection. The variability in quantitative characters increase considerably by treating the biological materials with different mutagenic agents. It is possible to identify mutants for different characteristics which can be useful in further programme. Variability is measured by different statistics viz., phenotypic coefficient of variation (PCV) and genotypic co-efficient of variation (GCV). GCV would be more useful for the assessment of inherent variability as it exhibits the heritable portion only.

Germination between M₁ and M₂ had a non-significant relationship in germination between M₁ and its corresponding M₁ progenies in M₂ (Table 27). Probably the reduction in the germination in M₁ might be very highly and significantly influenced by the conditions prevailing in germination and physiological disturbances that would be strictly associated in M₁ alone. Whereas the survival of the seedlings between M₁ and M₂ showed a strong positive relationship. The differential behaviour of the mutagens affecting germination and survival was also evident as discussed elsewhere.

However, seedling height on 10^th day sorted a differential relationship between M₁ and M₂. It was negative and non-significant. A non-significant relationship was exhibited for seedling height on 30^th day between M₁ and M₂ in all the doses. It may be interpreted that extent of physiological disturbances that occurred in the early stages and the extend of recovery mechanism that operated subsequently may be the major cause for this; not withstanding the haplontic and diplontic selection that operated in the biological system. Further the type of physiological disturbances happened, whether the enzyme systems affected or a substantial amount of toxic substances produced besides the genetical causes have not been studied in the present investigation. Moreover if the reduced growth was due to mitotic arrest in the meristamatic regions of the roots of M₁ plants, the disorder may not be completely inherited to its offspring’s (M₂ plants), in that sense selection at the cell level damages might occur in the M₁ itself and the selection for a cell with normal mitosis and extent of chromosomal damages that will be tolerated alone might be selected and hence the effect in M₁ need not be always related with M₂; it also depends upon the potency of the cell to recover from the mutagen induced damages. The ability of the cell in general, should be more in M₁ than in M₂ recover the disorder after several cell generations.

A detailed treatment on the concepts of mutagenic effectiveness and efficiency was given by Konzak et al. (1965). They proposed the term “effectiveness” as a measure of gene mutations in relation to the dose and “efficiency” as an estimate of the mutation rate in relation to other biological effects induced, such as lethality, injury or sterility. To obtain high efficiency, the mutagenic effect must greatly surpass other effects in the cell, such as chromosomal aberrations, and toxic effects which generally lead to damage

The induction of mutations in polygenes controlling quantitative characters can be detected by the estimation of mean and variance of progenies from normal looking mutagen treated populations. Induction of micromutations in different crop plants have been reviewed by various investigators like Gregory (1955, 1968) in peanut, Rawlings et al. (1958) in soybean, Oka et al. (1985) in rice, Brock and Latter (1961) in Trifolium, Borojevic (1966) and Scossiroli (1966) in wheat, Gaul (1961a, 1966), Astveit (1966) in barley and Brock (1967) in Arabidopsis.

Though more reliable results can be obtained from the study of quantitative variation in the advanced generations than in M₂ (Aastveit, 1968, and Scossiroli, 1977), an estimation of the extent of induced genetic variability in quantitative traits in M₂ itself will be valuable in providing information for future selection programme. It was therefore considered worthwhile to study the shift of mean values and to gather information on induced genotypic variance heritability and genetic advance for different quantitative traits from families of M₁ from different mutagenic treatments.

Macromutations were observed in the present set of experiments, under all the treatments (Table 12-14).

As the dosage of gamma rays increased, there was a decrease in their frequency. EB showed less mutation frequency than gamma rays and EMS. But in combination with gamma rays it produced more frequency of macromutations. As the dose increased the frequency also increased. EMS as single treatment produced macromutations like that of gamma rays, but in combination with gamma rays it produced more frequency than gamma rays as individual treatment. However, as the dosage increased the mutation frequency was also reduced. Medium dose combination produced more mutations than higher and lower dose combinations of gamma rays + EMS.

On M₂ plant basis, gamma rays in combination with EB produced the maximum viable mutation rate (4.04), whereas gamma rays individually induced a maximum rate of 2.23 and EB as a sole mutagen generated a maximum rate of 0.79. But EMS as a single treatment showed 1.69 as viable mutation rate, in combination with gamma rays it generated as much as 2.49. Combination treatment showed a less than synergistic effect.

Mutation in M₂

The output of mutations in M₂ and subsequent generations solely depends upon the complex interaction between many factors in the treated organism together with the specific modes of action of particular mutagen. These results are expressed quantitatively by the mutation rate and qualitatively by the mutation spectrum. The proportion of mutated plants to normal ones which is the mutation rate can be computed on the number of mutations per 100 M₁ plants (Gustafsson, 1940), number of mutations per 100 M₁ spikes (Stadler, 1928), and number of mutants per 100 M₂ plants (Gaul, 1960). After comparing the three indices, Gaul (1960) has concluded that mutants per 100 M₂ plants provided the best index, as it is proportional to the initial mutation rate and is independent of variations in progeny size and size of mutated sector. In Pisum, Blixt (1966) has confirmed this. Mohan Rao (1972) has reported that in barley, the M₂ seedling method determined the total induced mutation frequency. This method is also superior since it accounted for the components of induced mutation frequency viz., the frequency of mutated initials in each spike primordium and the frequency of spike primordia mutated.

The qualitative output of mutation in M₂ and later generations is expressed as the mutation spectrum which reflects the different frequencies of different mutations. Westergard (1960) found that the alkylating chemicals induced a higher proportion of less drastic mutations such as Viridis compared to extreme mutations such as Albina than those induced by radiations because of their apparent slight effect on chromosomes. Sidorova (1966) found a positive correlation between the spectrum of chlorophyll and the spectrum of morphological mutations.

Experimental mutagenesis is an important unconventional source to produce mutations in high frequencies in cultivated plants. It makes possible the achievement of desired breeding objectives or atleast decisive progress in this direction through selection of mutants. By establishing extensive collection of mutants based on productive varieties excellent sources of valuable material for theoretical studies and for breeding work can be provided. The induced mutagenesis helps in diversifying varieties and in internal rectification. The simultaneous realization of different breeding objectives may be possible through induced mutagenesis especially in leguminous crops.

Stubbe (1959) stated that mutation breeding as a modern method of plant breeding has proved its justification. It mutation breeding, basic information is a prerequisite on the type of spectrum of induced mutations and relative effectiveness and efficiency of different mutagens.

Biological materials

Seeds from self fertilized plants will be obtained from the concerned breeder. Hand picked, uniform sized seeds will be chosen for mutagenic treatments.

Gamma irradiation

Gamma irradiation will be performed in gamma chamber, exposing the seeds to gamma rays from ⁶⁰Co source: well filled and hand picked uniform sized seeds with a moisture content of 8.5 per cent will be chosen for irradiation. A sample of say 120 seeds per treatment will be packed in butter paper cover and placed in 100 curie ⁶⁰Co gamma cell. The treatments will be given for various duration depending on the doses required with the dose rate of say 54.05 rads/sec.

Chemical mutagenesis

The seeds will be soaked in water for say 6 hours before the chemical treatment. The duration of pre-treatment with water will be determined on preliminary blank experiment. In cowpea genotype Co. Vu. 623, there was about 5-10 per cent radical emergence about 12 hours after soaking in water. There was no radicle emergence before 12 hours water soaking. An initial pre-soaking period of 6 hours was therefore adopted for later treatment with mutagens. The total treatment period will be about 12 hours (6 hours with water and 6 hours with chemical mutagen). The duration of treatment with chemical mutagens will also be based on the half-life period of the mutagen solution.

A mutagen is a physical or chemical agent that changes the genetic material (DNA) of an organism and thus increases the frequency of mutations above the natural incidence. Errors during DNA replication, repair and recombination also causes spontaneous mutations naturally. Mutagens may be of chemical, physical or biological origin. The properties of each mutagen vary by causing damage to the DNA, and most often result in replication error.

Mutations are sudden heritable changes in characteristic of the organism, that is other than due to recombination (Swaminathan, 1983). Mutations occur naturally as spontaneous mutations and induced as spontaneous mutations and induced artificially by treating the biological materials with physical and chemical agents (mutagens). Experimental mutagenesis is effective method to enlarge genetically controlled variation, considerably within a short time.

Darwin’s theory of evolution explains that “variation is the mainspring of evolution”. The extent of genetic variability available in the breeding population and the selection techniques determine the efficiency of any breeding programme. In classical plant breeding programme, variation is generated by hybridization and selections are made from the resulting segregating generations. Induced mutagenesis can supplement hybridization or replace as a source of variability. Thus, mutation provides the raw material for crop evolution (Mahadeva and Randerson, 1982) and it provides the fundamental variability required for crop improvement by breeding (Konzak, 1984).

Introduction

Castor (Ricinnus communis L.) is an important non-edible oilseed crop and occupies an important place in the country’s vegetable oil economy. The crop is mostly confined to Gujarat, Andhra Pradesh and Rajasthan. Although other states like Tamil Nadu, Karnataka, Orissa, Maharashtra, parts of Madhya Pradesh, Bihar and Chhattisgarh cultivate castor, their contribution to either area or production is limited. Presently, castor is grown over an area of 8.7 lakh hectares with a production of 11.7 lakh tonnes and productivity of 1352 kg/ha in the country (2008-09). Castor oil finds application in manufacture of a wide range of ever expanding industrial products such as nylon fibres, jet-engine lubricants, hydraulic fluids, soaps, varnishes, paints, medicines and a host of similar other products. Castor cake is used as manure and also as nematicide. Gujarat and Andhra Pradesh put together contribute to 68.5% of the total castor area and 80% of the total castor production in the country. The crop has been cultivated under resource-rich irrigated conditions in Gujarat with very high productivity (1963 kg/ha), while in Andhra Pradesh, the crop has been cultivated under rainfed and poor resource management conditions, with very low productivity (509kg/ha).

Introduction

For uplifting the socio economic conditions of the poor mass, government enacted many programmes to make available of institutional credit flow to the farmers almost at their doorstep at a reasonable rate of interest. Hence, the mind set of borrowers has changed. credit is no more regarded as “hangman’s rope” but are considered as an economic “ladder or elevator”

However, Credit can serve useful purpose only when it is used for productive purpose to generate additional income. Otherwise, its deviation for non productive purposes would affect the repaying capacity of borrowers and create over due and defaulters. The increasing rate of non repayment has been one of the major problems for all the financial institutions. Increasing default in the repayment of loan led to very serious implication, for instances, it discourages the financial institutions to refinancing to the defaulting members.

Introduction

Agriculture is the base of Indian economy on which the fortunes of over 70 million families directly or indirectly rest. The women in these families are also partners in crop and food production as managers, decision makers and skilled farm workers. The socio economic advancement of a country can be best judged by the status and position, which is bestowed on its women. Women as a class, play a vital role in the process of economic development. According to census 2001, women constitute 48.26 per cent of the total population of India and 25.67 per cent of the female population are designated. Amongst the female workers, 32.50 per cent are identified as cultivators and 39.43 per cent as agricultural labourers.

Introduction

Women constitute half of the Indian population. Around 80 % of the total female population lives in rural and out of 31 million women work force of the country, 20 million are living in rural areas. The role played by women in agriculture is more enormous and fully recognized. Women accounted for more than 76 per cent of the marginal workers and about 16 per cent of them are main workers. Among main workers as well as marginal workers more women belong to the category of agricultural labourers. The role of women and their involvement is more in production, processing and storage of grains. In general, 60-70 per cent of labour input is provided by womenfolk which increases upto 80 per cent in rice. Women formed part of a highly valuable human resources which with appropriate training and education, can bring about phenomenal changes in the desirable direction. By keeping this view, the main focus of this paper was, to find out the role played by the farm women in farming, allied and off-farm activities.

Introduction

Women in India had a high and glorious tradition. All nations have attained their pinnacle of glory only when women have been free, cultured and pure. Women have been the transmitter of culture in all societies. Modern living has brought with it not only innumerable means of comfort but also a plethora of demands that tax human body and mind. Stress is an inescapable part of human life is manageable to a large extent. With proper understanding of the processes that cause stress, the situation can be well managed. The stress management is very easy if we sincerely analyze the reasons of stress. Physical stress management techniques have been used since a long time.

The investigator had undertaken the study entitled “Positive Therapy for enhancement of Self-Esteem, Self-Efficacy and Management of Stress among Women in Local Governance in Coimbatore District”.

Introduction

Women are vital part of the Indian economy, constituting one-third of the national labour force and are considered to be the major contributor to the survival of the family. Despite progress in several indicators, gender analysis of most social and economic data demonstrate that women in India continue to be relatively disadvantaged in matters of survival, health, nutrition, literacy and social status. More than 90 percent of rural women in India are unskilled thus restricting them to low-paid occupations. Women generally have no control over land and other productive assets, which largely excludes them from access to institutional credit and renders them dependent on high-cost informal sources of credit to secure capital for consumption and for productive purpose.

Among 621.1 lakh population in Tamilnadu (according to 2001 census) 308.4 lakh are females. The people below poverty line in Tamilnadu are about 21.12 percent, out of this, women share equal percentage of poverty. In a patriarchal society, women have inadequate knowledge on various aspects and depend largely on the male siblings or husbands. They also do not have much access to credit or income as most of the expenditure is controlled by men. Even where they have some measure of control they spend most of their earnings on family needs. Estimates shows that more women and girls experience the vigour of poverty than men in poor holds because of inequalities in access to food, healthcare and education. (www.undp.org.in).

Introduction

In the existing socio-economic scenario, economic independence is considered as one of the main status indicator in the society. Women especially in rural areas are the deprived section of the society on account of their dependence on others for economic reasons. This necessitates generation opportunities so as to make them economically independent. Moreover, women’s contribution to national development is crucial. The process of development would be incomplete and lopsided, unless women are fully involved in it. Many innovations have failed due to non-satisfaction of women on the perceived attributes of innovations. So, it is necessary that they should be informed, trained, convinced of a technology primarily.

Farm women can’t emerge as a good entrepreneur, if they are not equipped with any skill, knowledge, education and information. So, research studies are essential to assess the training needs of them to become a successful entrepreneur. In order to know the training needs of farm women for entrepreneurial development, and the constraints faced by them to become a good entrepreneur.

Introduction

Since six decades after independence, the existence of people in a state of social, economic, political and knowledge disempowerment is considered as major threat to overall development. There is an essential demand for the integrated development, which should cover up development in all aspects, specifically in status, equality, security, complete physical, mental and social well-being of the target group. One sided emphasis on economic achievements by policy makers has set in motion so for But the social cleavage in rural areas has deepened. The power to the people signifies a new movement, which has been born out of the realization that society’s traditional arrangements for voicing their problems are very meager. The economic growth does not mean that only creation of wealth, but also creation of people’s capacity to create wealth and this resides in their health, education, knowledge and skills. It has been proven fact that, the economic development in any country should be preceded by social development which is interdependent. To combat the poverty at present juncture, efforts should be through the group approach only. So the new paradigm like Self - Help Groups (SHGs) can attain sustainability because of the clear cut understanding among them. Almost failure of co-operatives to mitigate unemployment problems and combating rural poverty, it is essential to think over self help group approach to empowering the rural poor.

Introduction

In India, the marginal, small and semi-medium land holding constitutes more than 90% of the land holdings in the country. They are caught in a vicious cycle of low investment, low productivity and low income with little chance to get out of it. In general, majority of farm families possess limited and scattered land holding with a low productivity and they have very limited accessibility to the improved agricultural information because of their illiteracy and lack of participation in extension programmes. The development of entrepreneurship in subsidiary activity like vermicompost production and Dairying will definitely help the small and marginal farmwomen to increase the farm income. The entrepreneurship among farmwomen in vermi composting and dairying will definitely encourage them to start self employment in addition to the agricultural income. Farmwomen perform -multifaceted role in various fields such as production, processing and marketing. In spite of their significant contribution to production they have virtually remained invisible as farmers, home makers and the ultimate by protecting the whole family. Their role has become critical in the process of moving their family out of the vicious ‘circle of poverty’ Nataraju and Perumal, (1990). Farmwomen generally have lower income and less leisure time than men and seldom have equal opportunities to develop their capabilities. Farmwomen have been considered unorganized and inferior to men, Lelamma (2001).

Introduction

Women empowerment is a global issue and it is the outcome of criticism and debates generated by the women’s movements / feminists. Empowerment is the process by which the powerless gain greater control over the circumstances of their own levels relating to both resources and ideology.

Empowerment means the ability to assert oneself; striving for upward mobility or attaining the psychological status of being powerful. Empowering of women is necessary for sustainable development of a community. Sustainability implies a state of balance and equilibrium in factors related to human life which can be social, political, financial, environmental and even spiritual. (B.K.Singh,2006).

Women empowerment often involves the empowered developing confidence in their own capacities. Empowerment, probably, the totality of the following or similar capabilities (social welfare,2010).

Introduction

Very few countries have experienced rapid economic growth without agricultural growth either preceding or accompanying it. Agricultural growth is a catalyst for broad based economic development in most of the low-income countries. Over the last few decades, the share of agriculture in GDP has steadily declined in India from over 19.7 per cent in the 1970-7 to 5.7 per cent in 2009-10. In contrast, the share of industry and services has increased to 26.4 and 55.1 per cent respectively due to greater focus on these sectors. But, agriculture still remains the backbone of Indian economy as nearly as 58 per cent of the rural population depends upon agriculture and allied activities for livelihood. The National Agricultural Development Policy (NADP) of India envisages a growth rate of 4 per cent per annum in the agriculture sector so as to achieve a target of over 300 million tonnes of food grain production by the year 2020. (Survey of Indian Agriculture, 2007).

Introduction

The people in Kolli Hills were more traditional in nature believing the fith and practices of the local communities. They happened to manage their livelihood through agriculture and maintained an indigenous life with their own knowledge system. They used to maintain the longstanding traditions from their ancestors and spread the knowledge in different spheres of livelihood. Such socially generated knowledge is popularly called as local knowledge. The ongoing practice of using such knowledge for indigenous communities established the belief that such knowledge used in atraditional manner was fruitful for the people. The concept of indigenous knowledge gained its worldwide recognition through the United Nations Conference on Environment and Education in 1992, World Conservation Strategy of International Union and Conservations of Natural Resources in 1980, Brundtland Commission, and World Commission on Environment and Development, 1987. These events recognized the existence of indigenous knowledge in every country, society, culture. Since India has a long history and much enriched culture there is abundant reservoir of indigenous knowledge in every part of the country. Similarly Kolli Hills of Namakkal district in Tamil Nadu, is a historical land having enriched cultural heritage which has varied communities and immense resources. Its flora and fauna are vast and varied in nature. The tribal communities, of this Kolli Hills, “Malayali” appear to live on their own knowledge system. The paper is intended to unfurl the essence of Indigenous Tribal Agricultural Practices (ITAPs) in Kolli Hills and the rationality analysis ITAPs in the study area. According to Grenier (1998) indigenous knowledge is the traditional knowledge of the local community existing within and developed around the specific conditions of women and men indigenous to a particular geographical area.

Introduction

Indian forests are being denuded at an appalling rate of 1.5 million ha per year but only a tenth of this is being renewed. This has resulted in the accelerated dwindling of forest resources to a meager level of 23.55 per cent of the total geographical area against the mandated requirement of 33 per cent. This low forest cover coupled with poor productivity (0.5 -0.7 m³ ha-1 yr^-1) in comparative global statistics (2.1 m³ ha-1 yr^-1) of Indian forest has ushered in a total mismatch between supply and demand of both domestic and industrial wood besides creating environmental de- stability and disequilibrium. The National Forest Policy of 1988 has resolved to phase out the supply of raw material to wood based industries and ultimately totally stopped the raw material supply from the forest (Anon., 1988). The policy also indicated that wood based industries have to become self reliance in meeting the raw material demand by establishing direct linkages with the farmers by providing lending facilitates and other input needs. This is going to pave the way for a strong industry-farmer nexus, with many farmers attracted towards tree husbandry due to assured marketability and income. As the activity gets intensified, location specific problems warranting solution are also found to be in the ascendancy.

Introduction

On 26^th December 2004, out of the 7516 km long coastline of India, more than 4500 km stretch was badly affected by the 9.0 magnitude earthquake- triggered tsunami, resulting in the total destruction of living environment along the coast. The worst affected areas along the Indian coast were in Tamil Nadu, Kerala, and Andhra Pradesh states. Tamil Nadu state suffered maximum loss with the damage concentrated in 4 districts.

It was reported that due to 26 December, 2004 Tsunami in Tamil Nadu state, 8.96 lakh people were affected, 376 villages had heavy damage, 7951 human lives lost, 1000 KM coastal length is affected, the sea water penetrated 1-1.5 KM distance into the main land, 128394 dwelling units affected, 9559 cattle lost, 10245 ha cropped area affected, 42655 boats damaged. (GOI, Ministry of Home Affairs, 09.01.2005). Many felt that impact will be very serious and it will take years to resume normal activities in the region. This paper presents an analytical study of the impact of tsunami on agricultural production, household income of the farm households on a continuous basis from 2005 to 2008.

Introduction

Organic agriculture is defined by Food and Agricultural Organisation / World Health Organisation Codex Alimentarius Commission as “a holistic production management system which promotes and enhances agro-ecosystem health including biodiversity, biological cycles and soil biological activity. It emphasizes the use of management practices in preference to the use of off farm inputs. This is accomplished by using, where possible agronomic, biological and mechanical methods as opposed to using synthetic materials, to fulfill any specific function within the system”.

Introduction

The prosperity of Tamil Nadu depends on the development of rural areas. As per the 2001 Census, Tamil Nadu’s rural population was 36.2 million, amounting to 58% of the total population. Of these 90 percent are earning their livelihood through agriculture and allied activities. The agricultural situation in Tamil Nadu largely depends on the quantum of rainfall received during seasonal rainfall of South West and North East monsoon. North East monsoon which occurs around September to November is more crucial as South West monsoon which will give enormous rainfall to other Indian states is blocked by Western Ghats. So Tamil Nadu is receiving low rainfall and it also comes in three to five heavy showers during October and November. This limits the wet period (good condition for cultivation) to two to five weeks for the whole season. The wet period is further shortened by fast wind and soil type in some area. Thus, the success of the crop is largely determined by one’s capacity to exploit the short wet period. Even though the Tamil Nadu is relatively better position in tapping available ground water resources (92 percent of potential has been tapped), 82 percent of the well is owned by medium and large farmers who is only 10 per cent of total cultivators.

Introduction

Soil, water and vegetation are three basic natural resources. The survival of God’s creation depends upon them and nature has provided them as assets to human beings. The management of natural resources to meet people’s requirements has been practised since the pre-Vedic era. Farmers were ranked high in the social system and village management was in their hands. Over-exploitation of natural resources by growing population resulted in various severe problems. Destruction of vegetation has resulted in land degradation, denudation, soil erosion, landslides, floods, drought and unbalanced ecosystems. A balanced ecosystem is an urgent need.

There is an increasing realization throughout the world, about the state of our environment, caused by over-exploitation of natural resources for economic development. Resource exploitation in the developing world has largely been geared to meet the very basic needs of food, fodder, fuelwood and shelter of a large section of deprived societies. On the other hand, developed parts of the world have largely concerned themselves in trying to maintain and accelerate the already very high levels of resource consumption that they have achieved for a much smaller segment of the world’s population, based on an early initiative taken and advantage gained through industrialization. Natural resource base has often viewed as limitless by the industrialized world either due to a myopic view of the future or because of their immense faith in technology being able to substitute for the natural resource capital. This faith in technological quick-fixes for world’s problems linked with over-consumption is still prevalent.

Introduction

During the last four decade, spectacular progress has been achieved in agricultural production in the country. Compared with 51 million tones of food grain production in 1950-51, India achieved food grain production of 211.17 million tones during 2001-02, making it not only self sufficient in food production but also in a buffer stock of over 30 million tones. This achievement was because of high intensity cropping and cultivation of high yielding varieties that were highly input responsive. Farmers used chemicals and synthetic pesticides, fertilizers and growth promoters above the level of recommended dose with a motive to get higher yields. In this process the soil, water and environment got polluted besides degradation of natural resources. Paddy is the principle food crop and ranks second in the consumption of pesticides in Tamil Nadu. In order to protect our environment, the state department of agriculture had started advocating eco-friendly agricultural practices in paddy cultivation. In addition to the government efforts, number of non-governmental organizations (NGO’s) also taking intensive efforts to make the farmers to adopt eco friendly agricultural practices. Among the several NGO’s in Tamil Nadu, Agricultural Man Ecology Foundation (AMEF) is a Netherland based NGO found to have taken strenuous efforts to advocate and popularize eco -friendly agricultural practices. It has network with other NGO’s situated all over Tamil Nadu and rendered technical and financial support to them for the promotion of eco-friendly agricultural practices. Keeping this in view, a study was conducted to assess the impact of eco-friendly agricultural practices among the paddy farmers who have trained by the AMEF network NGO’s.

Introduction

In India the present population of over 1000 million, accounting for about 18 percent of the world’s population, is estimated to become 1.4 billion by 2025 and 1.7 billion by 2050 AD, needing annually about 380 Mt and 480 Mt food grains respectively (Yadhav 2008). This scenario along with the increasing industrialisation and urbanisation will place tremendous pressure on the shrinking natural resources. However, we still have the capacity to produce enough food to meet the basic requirements of the burgeoning population, but the moot question is whether, we can do so while maintaining our natural resources and preserving the bio diversity at the same time. Land are the basic natural resources which are essential for agriculture.

Introdution

In developing countries, traditional methods have special advantages over modern agricultural techniques. The capital and technological skill requirements in the use of traditional technologies are generally low and their adoption often requires little restructure of the traditional societies. By adopting such indigenous knowledge, our ancestors did not face any problem of large scale pest out break or economic crisis unlike the today’s farmers. The present study focused with this central theme of research.

Indigenous Technical Knowledge refers to the unique, traditional, local knowledge existing within and developed around the specific conditions of women and men indigenous to a particular geographic area (Grenier, 1998). Indigenous Knowledge is the accumulated knowledge, skills and technology of the local people. Indigenous Knowledge has two powerful advantages over scientific knowledge like it has little or no cost, and is readily available. Indigenous Knowledge can be defined as the knowledge built up by a group of people through generations of living in close contact with nature over the years; the farmer in India had been using cow dung and cow urine as manure in the fields.

Introduction

Land and water are important natural resources available for agriculture crop production. The resource is available either for agriculture or for human / animal consumption, from precipitation in the form of rain. According to National Commission of Agriculture, half of the available land in India will continue to depend on dry land even after our total surface and ground water potentials are fully exploited by 2025 A.D. So far efforts were made in improving the irrigation potential to step up crop production and very little attention has been paid to dry lands. Considerably improved but the farmers in dry land areas are still suffering.

Introduction

Among the various vegetable crops, tomato (Lycopersicurn esculentum) is one of the important and popular vegetable and plays an important role in balanced nutrition and hence it is called as `poorman’s orange’. Tomato fruits can be seen in the market round the year. In India, tomato occupies an area of 2,90,279 ha with the productivity of 15.85 t/ha and production of 46,03,446 tonnes (www.nhb.gov.in). Among the different districts of Tamil Nadu, Salem district has an area of about 6311 hectares under tomato with 17,359 tonnes of production. Pest management is one of the important dimensions in cultivating tomato crop that needs significant attention. The objective of pest management technologies are maximize pest control in terms of overall economical, social and environmental values. In order to restore ecological balance, it is necessary to integrate all the available pest management techniques in the most compatible manner with the least use of chemicals which is the principle of pest management. ‘Pest management technology’ utilizes all suitable techniques and methods in a compatible manner as possible and maintains the pest population below their economic injury levels given by Bikramjit et al. (2007).

Introduction

India is the third largest producer of cotton in the World. The cotton farmers of India are facing many problems. The stories of Vidharba are crucial lessons for the technocrats and policy makers. Most of the cotton growing areas are dry tract hence grown as rain fed crop. An amount of Rs. 12 billion worth of pesticides are used to control the serious pest i-e boll worm. In order to make the farmers to live debt free life and ensure the maximum reach out efforts of extension, it, needs a strategic TOT efforts.

In this juncture introduction of Bt cotton is a phenomenal change in the cotton industry and needs a careful practices to increase the adoption since it has some complex issues like growing refugee crops. TOT of Bt cotton is unique because of its newness attracts positive and negative comments. A study to assess the acceptance, non adoption and constraints related to Bt cotton was carried out and the findings are given below.

Introduction

Livestock and livestock products are an important source of food nutrition and livelihood security. Animal origin foods are an important source of high quality protein and micronutrients compared to cereals and plant-based foods. Production of animal- based foods has grown dramatically over the past two decades. Meat, Milk and Egg consumption has grown rapidly in east and Southeast Asia over past twenty years. The greatest increase in the production and consumption of animal-origin foods, as a result of rising incomes and dietary diversification away from staple cereals, has taken place in East and Southeast Asia. World meat markets reveal that the production and trade of bovine meat, poultry meat, pig meat and ovine meat are significant unlike rabbit meat. In spite of many advantages in rabbit farming and rabbit meat, the rabbit meat is less consumed when compared to other meat. So the objective was to study the farmer who involved in rabbit farming.

Introduction

Indian agriculture contributes to 25 per cent of the National Gross Domestic Product. As per Census of India, 2001, India’s total population was 1,028.6 million and the percentage of decadal growth of population during 1991- 2001 was 21.34 per cent. Thus, the main challenge is to produce enough food for increasing population.

Many new agricultural technologies and improved practices are being developed in agricultural research stations. Effective communication of these agricultural innovations to millions of farmers in rural area is essential to bring about accelerated agricultural development. The impact of demographic pressure on reducing farm size further on the one hand and the need for longer or optimum sized farms to take more advantage of modern technology on the other hand would bring into sharper focus the growing contradiction in the farming sector.

Introduction

India’s population is projected to be around 1,350 million by 2020 AD which requires food grain production of 343 million tonnes. Considering the current food grain production levels, India needs to raise food grain growth by not less than 4 percent. On the other hand the available per capita cultivable land has declined from 0.48 ha to 0.14 ha and by 2050 it may further decline to 0.07 ha i.e. for every 14 persons only one ha land will be available to produce all essential items like food, fiber, fuel, fodder, fruits etc. (Harshal et al., 2006). About 75 percent of 105 million farm families belong to small and marginal farmers with less than 2 ha and 40 percent of the rural population lives below poverty line. We often talk about self-sufficiency in food supply but the fact is that population living below poverty line does not have the purchasing power.

Introduction

Agriculture has always been. India’s most important economic sector. To improve this agriculture betterment, it needs principally two important sectors, one is public sector and another one is private sector. In India, generally, Ministry of agriculture and co-operation, State department of agriculture, State agricultural universities, ICAR and its transfer of technology projects are the major public extension service providers

The contribution of public extension in attaining self-reliance in food production is very well recognized. But in this changing time of globalization, public extension alone is not sufficient to address the multi-faceted problems faced by farmers. Also the performance of public sector extension is under scrutiny. Rivera et al (2000) reported that the public extension system is now seen as outdated, top-down, paternalistic, inflexible, subject to bureaucratic inefficiencies and therefore unable to cope with the dynamic demands of modern agriculture.

Introduction

Sugarcane based production system has to go a long way to turn hightech because of the existing technological gap in the irrigated agroecosystem. This has been realized more in the recent studies undertaken by social scientists. All the crops associated with the sugarcane based production need varietal introduction as well as the adoption of relevant crop management practices. Since the possibility of increasing area under sugarcane is remote in view of emerging low input high value crops, the projected target of 420 million tonnes by 2020 AD has to be achieved by enhancing the cane productivity and sugar recovery concurrently. The full exploitation of the existing improved sugarcane production technologies and development of a package of agro-techniques in the changing scenario of sugarcane based production system suiting to the socio-economic conditions of the farmers is as such the only master key to unlock the yield potential of sugarcane.

Introduction

Farming community is facing multiple problems to maximize crop productivity as well as to increase farm income. In spite of successful research on new agricultural practices concerning crop cultivation, majority of the farmers are not getting upper-bound yield and not earning profit due to several constraints. One of them is that expert advice regarding crop cultivation is not reaching the farming community in a timely manner. It is true that India possesses valuable agricultural knowledge and expertise. However, a wide information gap exists between research and actual adoption in the field. Farmers need timely expert advice to make farming more productive and competitive. Local information resource centers are gaining importance with computers carrying expert systems to help farmers in making decisions. It is known that many Agricultural Research Institutes are involved in the development of agricultural expert system to satisfy the information needs of farmers.

Introduction

The share of Agriculture sector in GDP is declining over the years. This is because, of the a large gap in the latest known technology and technology being used by the farmers. Our human resources are not being utilized properly because our people in the villages are ignorant about many scientific innovations.

In Andhra Pradesh, more than 70.00 per cent of the population is dependent on agriculture but its contribution to the state GDP is only 30.00 per cent. It is felt that this low contribution to the GDP by the Agricultural sector is due to uneconomic returns

Indian agriculture is passing through a phase of reforms, owing to its shifting emphasis towards diversification, intensification, commercialization and sustainability, which has posed newer challenges before the extension functionaries. Understanding and appreciating the information needs of different clients (farmers, farm women, labourers, youth, etc) and providing quality extension service is central to its success, which needs quality manpower at different levels. Among extension services training need resources is a key input for human recourses development and contributes substantially to face the challenges by all concerned. Farmer led extension approach gives farmers the opportunity to share their experience and practices through a method demo with fellow farmers in the area. It was noticed that farmers who are successful in their farming venture have established credibility among their peers. These very same farmers are just waiting to be tapped to act as extensionist.