eChapters

The most established method for detecting crop water stress remotely is through the measurement of a crop’s surface temperature. The correlation between surface temperature and water stress is based on the assumption that as a crop transpires, the evaporated water cools the leaves below that of air temperature. As the crop becomes water stressed, transpiration will decrease, and thus the leaf temperature will increase. Other factors need to be accounted for in order to get a good measure of actual stress levels, but leaf temperature is one of the most important.

Leaf area is an important attribute in bio-productivity studies, as it bears an important and direct relationship to photosynthesis and transpiration. Leaf area is also important in determining the percentage of solar radiation intercepted by an individual plant or crop canopy. Photosynthesis centers on individual leaf. However, productivity depends not only on individual leaves but on stand of vegetation and canopy structure. The photosynthetic productivity of a canopy depends on both the amount of leaves present and the configuration of the leaves making up the canopy. Thus, leaf area has direct bearing on plant growth and final yield.

Water loss from a plant in the form of vapour is known as transpiration. Loss of water vapour mainly from leaf cells through pores but also from the leaf cuticle and through lenticels of the stem. The resistance to diffusion of water vapour through a plant’s stomata is called as stomatal resistance. Whereas, stomatal conductance is a numerical measure of the maximum rate of passage of either water vapour or carbon dioxide through the stomata, or small pores of the plant.

Real time weather data at different time intervals is very important for the crop weather studies, but through the agro-meteorological observatories such real time weather data are generally not collected. The acquisition of agro-meteorological data through conventional observatories requires services of trained personnel to collect, compile and creation of weather data base. With the advances in technology, weather observations are automatically recorded, stored and can be transmitted to the remote place with the help of Automatic Weather Station (AWS).

Weather has profound influence on agriculture, which demands that the changes in weather conditions are regularly monitored. In qualitative terms, weather conditions are often expressed on the basis of final condition created by interaction of different components. For example, too hot, too cold, sunny or cloudy, humid, dry weather conditions refer to specific atmospheric conditions but are least useful in analyzing the impact of weather on agriculture.
 
The measurements taken at a weather station can include any number of atmospheric observables. The WMO has laid down specifications, procedures and practices in respect of various meteorological matters such as instruments, observations, telecommunications, processing of data, analysis etc.

Heat units also called growing degree-days (GDD), effective heat units, or growing degree units, are a heuristic tool in phenology. GDD is a simple means of relating plant growth, development and maturity to air temperature. The concept is widely accepted as a basis for building phenology and population dynamic models. Degree day units are often used in Agrometeorology, Agronomy, Entomology and Pathology essentially to estimate or predict the lengths of the different phases of development in crop plants, insects, pathogens etc.

4.1 Ration and balanced ration

A ration is the feed allowed for a given animal during a day of 24 hrs. The feed may be given at a time or in portions at intervals. Balanced ration may be defined as the ration that provides all essential nutrients to the animal in such a proportion and amounts that are required for the nourishment of the particular animal for 24 hrs.

Weeds are the plants which grow where they are not wanted or simply plants growing out of place. A plant may be desirable in one situation and a weed in another situation. Those plants that interfere with human activity in crop and non-crop areas are considered weeds. Weeds compete with crops for soil nutrients, water and light; they host insects and plant pathogens harmful to crop plants, and their root exudates and/or leaf leachates may be toxic to crop plants. Weeds also hinder crop harvest and increase the costs of such operations. In addition, at harvest, weed seeds often contaminate the crop produce. Thus, the presence of weeds in crop areas reduces the efficiency of inputs such as fertilizer and irrigation water, enhances the density of other pest organisms, and finally severely reduces crop yield and quality (Labrada and Parker 1999).  Weeds are serious menace in crop production.

Weeds interfere with man’s utilization of land and water in various ways. The extent of losses depends on the intensity, infestation, time of occurance and type of weeds.

1. Competition between weeds and crops for growth factors

Weeds compete with crop plants for  other factors in the micro-enviroment. Weeds are capable of absorbing more amount of nutrient from soil than the crop plants. In dry lands, weeds exhaust the soil moisture and put the crop under water stress earlier and thus reduce the yield. Weed can compete with productive crop or pasture land or convert the productive land into unusable scrub. Weeds are also often poisonous, produce burrs, thorn or other damaging body parts or otherwise interfere with the use and managemet of desirable plants by contaminating  harvest or excluding livestock.

There streams of thought are presented in this paper:

One, that rural women are not only the warriors, creative actors in the agricultural scene, or rural areas, but also the urban poor, the  migrants , the homeless, the source of labour supply into the expanding urban spaces, including trafficking.
 
I would then argue [two] that this spread of the location of “rural women” is the phenomena that we should now look at, the connectivity between the old divisions of rural and urban, as it indicates the pressures that the current development paradigms operating in our countries, is putting on the RURAL … and therefore that we should look at the macroeconomic policies that are in place, globally and regionally and  nationally.

Abstract

Jasmine production in coastal Karnataka was confined to only few farmers with some specified pockets of coasted belt. Only a hand full of farm women in Belman, Manchakal areas were cultivating jasmine successively. The scientists of Extension Education Unit (EEU), Mangalore Campus of University of Agricultural Sciences, Bangalore visited the area and conducted a Survey during September 2001 and gathered information about farmers practicing jasmine production in the area and came out with some success stories from the jasmine growing belt. The jasmine market was studied especially the demand for jasmine flowers (Udupi Mallige). It was observed that there was huge demand for Udupi Mallige. The extension specialists conducted training programmes in different locations in the coastal belt of Karnataka which are not traditional jasmine cultivated areas. As a result the technology has spread to the entire coastal belt. At present farm women are supporting themselves soley by cultivating jasmine in an area of 3-5 cents with a minimum of 20 bushes. Further, the KVK’s which are working in Udupi and Dakshina Kannada districts are also working in this direction through On Farm Testing, Frontline Demonstration, Off campus and On campus training.  Since it involves only women labourers, it is one of the most important and viable subsidiary as well as main occupation of the women folk in the district

Abstract

The participation level of farm women in economic activities of self-help groups to know the socio-economic factors contributing to their participation in such groups and the constraints faced by them was studied during 2004-05 at Kadur taluk of Chikkamagalore district of Karnataka. Apart from these findings on the factors affecting their involvement in SHGs and the problems faced by them, the study also revealed that majority of farm women had medium level of family income, mass media participation and, low level of communication status.

Abstract

Women constitute almost half of the population of modern India. Eighty percent of the women population in India live in the rural areas and most of them are engaged in agriculture and allied activities and play a significant role in domestic and socio economic life of the society. Women play a vital role in ensuring proper development and growth of children. They also contribute significantly towards income generation, food preparation and health of the family members. However it is this women segment which is most neglected and suffers from poor health. Health and Nutritional status of this important and substantial segment of the society is very important. The present study investigates the nutritional profile and morbidity status of women in villages around Bangalore city.

Abstract

Women of sixteen villages in Bhadra wildlife sanctuary were interviewed for assessing the role of women on forest policies and conservation of natural resources. Survey conducted during 1996-1997 indicated that women in general declined to comment upon natural resources. Ninety percent of women had no knowledge about natural resources. Except for Fire Protection Act women had no knowledge of other government policies. They had no say in policies and conservation of natural resources in Bhadra wildlife sanctuary. As a result there has been encroachment of forest area, cultivation in forest land, shifting cultivation, hunting, smuggling, open cast mining and deforestation. To make role of women active and effective for conservation of natural resources in Bhadra wildlife sanctuary, suggestions have been advanced in this paper based on a survey.

Agricultural production systems depend on natural resources viz. land, water, biodiversity, forests, pastures and wildlife. Farm activities can also have major impacts on the quality and availability of these resources well beyond the boundaries of the production system. Although natural resources are critical to agricultural production, farm households also frequently depend on them to meet other needs, such as fuel, construction materials and supplemental foods. Thus rural livelihoods are intricately linked to the condition of natural resources. Over the last 40 years as food production has doubled, agricultural production systems have expanded, with significant impacts on the natural resource base:

While on one hand, more than 25 per cent of rural population in India is between 15 and 29 years of age, on the other, very little demographic dividend in agriculture is being derived. Unable to find decent employment, youth often look for employment in the urban informal sector, with poor working conditions and pay. But without training in skills suited to the urban labour market, these youth have few opportunities in the urban areas. Inadequately trained to compete successfully in urban labour market, they often suffer varying levels of poverty and marginalization in towns than in rural areas. In rural areas, if young farmers do not replace the ageing farmers, it will result in problems related to food security. For young people to take to agriculture, farming must be personally satisfying, mentally challenging, socially acceptable and economically rewarding. However, field reality is something different.

The Agriculture sector is by far the largest employer amongst all the major sectors employing roughly half of available workforce. At the same time, agriculture is the smallest sectoral contributor to the GDP. It is ironical that the most important requirement of human being, which is the bulk of agriculture farm produce, is largely considered to be an unrewarding sector in the nation.

Though the Indian agriculture has made significant strides in the course of the last 50 years of planned development, still the farmers today are facing the consequences of host of challenges, namely dependence of monsoon, declining size of land holdings, degradation of soil & water resources, declining investment of public sectors on agriculture. So farmers are increasingly getting indebted and temptation to sell their farm land  for non-farm purposes is growing. Over 45 per cent of farmers want to quit farming says a survey conducted by National Sample Survey Organization (NSSO).

Agricultural land is still a great source of income. But the practice of unsustainable methods and improper resource management leading to successive crop failures that make agriculture non- profitable and highly  risky.  So, the interest of youth in agriculture has been declining. While most developing countries are still experiencing high population growth rates, the youth are migrating in significant numbers to urban areas. The younger generation does not consider farming as a profession and they treat it as traditional activities of their family. The farm youth think that the farming system is not capable to provide a life, therefore they are diverting from agriculture to other profession.

Indian agriculture is at demographic, ecological, economic and technological cross-roads. Demographically, nearly 70% of the population is below 35 years in age and 70% of them live in rural areas.  Within the next few decades, India will have the world's largest number of young people looking for employment.  Ecologically the basic life support systems of land, water, forests, biodiversity and climate are in distress and the population supporting capacity of major ecosystems is being exceeded in most parts of the country. India's ecological debt and Nature Deficit Disorder are growing. Economically, the cost-risk-return structure of farming is becoming adverse, with the result that over 40% of today's farmers would like to quit farming, if they had another livelihood option. Technologically, there is a serious mismatch between production and post-harvest technologies. Also, there is no nationally agreed policy towards the technological transformation of agriculture, involving farm mechanization and frontier technologies like recombinant DNA technology and nano-technology.

Though gender is universally one of the key ways in which societies and culture allocate rights and responsibilities, yet the different roles of women and men in agriculture production have frequently been ignored in research and extension activities. Farming is a family enterprise involving both men and women. The role of women and their involvement is more important in production, processing and storage of grains and vegetables. Women in India constitute nearly half of its population and have a strong influence on the growth of the remaining half of population.

Krishi Vigyan Kendra imparted learning through work experience and concerned with technical literacy. Krishi Vigyan Kendra imparted training to practicing farm women. The Krishi Vigyan Kendra of Gandhigram Rural Institute was established in July 1989 specifically to cater the needs of the peasants of the Dindigul district.  Inspite of these efforts, there exist a wide gap-between the availability of production technologies and adoption of those technologies. Evaluation of training programmes organised for farm women would provide an understanding of their effectiveness so as to improve them. Hence, a study was undertaken to assess the training needs, appropriate season, venue, type, frequency, duration and method of training in paddy crop as perceived by the respondents.

The Government of Tamilnadu has taken a number of progressive measures on water resources and irrigation management, particularly through the Bank -assisted Tamil Nadu Water Resources Consolidation Project (WRCP) which was closed in September 2004 with a satisfactory rating. Now the Tamilnadu Government has decided to implement a project for the modernization of the Traditional Irrigation systems in Tamil Nadu with loan assistance from World Bank. The World Bank has also come forward to assist the Tamilnadu Government’s proposal. Under the World Bank funded project of “Irrigated Agriculture Modernisation and Water Resources Management” (WRCP - II) about 17 River sub basins have been selected and proposed to be taken up under the control of Water Resources organisation Wing of Public Works Department of Tamilnadu. The Varahanadhi sub basin is one among the seventeen. Accordingly this ‘IAMWARM’ Project report for the modernization of the irrigation systems of Varahanadhi Sub Basin has been prepared. The very objective of this project is to attain maximum productivity from farm lands, for which serious attention is required to modernise the existing irrigation structures, anicuts, canal systems and tanks in order to make them functionally more effective, conserve and utilise the available water from catchment area for optimum use.

In this era of information and communication, in a country like India where more than 75% of population live in rural areas, radio is the cheapest medium available in almost all families for entertainment and education.

A community radio (CR), in essence is a type of radio service that caters to the interests of a certain area, broadcasting material that is popular to a local audience but is overlooked by more powerful broadcast groups. It is usually established by the efforts of a specific community, operated by the community and for the community’s welfare. Radio can play an effective role in promoting social change.  Community radio station is one that is operated in the community, for the community, about the community and by the community.  It can play a very important role in bringing about social change. It covers all developmental and rights based issues, and can help to sustain the diversity of the local cultures and languages. It is an effort towards bottom-up approach to address specific requirements or rural Indian population. An attempt has been made to know the profile characteristics of krishi community radio listening farm women, awareness of farm women about FM krishi community radio and to study the usefulness of krishi community radio programmes as perceived by farm women.

In India, for centuries women have been pushed aside from the race of development in the name of customs, traditions and religion. As a result they have been denied the opportunities for their social, economical and political development leading to the lower status in society. The present situation demands active participation of women along with men in all walks of life. Involvement of women in all development activities. Based on the recommendations of National Policy of empowerment of women, Tenth Plan suggests a three fold strategies for empowering women through social empowerment, economic empowerment and gender justice.
 
Women play a significant and crucial role in agriculture and allied fields including crop production, dairy husbandry, horticulture, post harvest operations etc. It has been estimated that about 86% of the total rural women are working for various agricultural operations. They play an important role not only in maintaining their home task but also managing their farms and animals, depending upon the situation, personal and socioeconomic characteristics of the family to which they belong.  Women are also partners in animal husbandry activities management as manager or skilled workers.

The term empowerment has different meaning in different socio-cultural and political context and does not translate easily into all languages. The term include self strength, control, self power, self reliance, own choice, life of dignity in accordance with one’s values, capable of fighting for one’s right, independence, own decision making, being free, awakening and capability of mention only a few.

The past development efforts in India center around individual approach and these efforts did not bring about sustained development of people in the respective areas. In view of this, the development of the people could not be harnessed to the fullest potential. Realizing this lacuna, the group based development efforts have come up in a big way across the country in the recent years. The Government, private organizations and also the NGOs are giving due importance for the promotion and establishment of Self Help Groups (SHGs) for addressing all developmental issues. As on today, there are more than 3.37 million SHGs across the country, Tamil Nadu is one of the pioneering states in the formation and promotion of women SHGs and about 4.41 lakh SHGs are functioning in the state. Among the SHGs formed, some of the SHGs are functioning well and sustain for a longer period and others did not come up to the expectation and they did not sustain for longer period. Hence, it was considered opportune time to find out the sustainability level of the SHGs and isolate factors for variation since there was no research back up.
 
Therefore, the study was undertaken to analyse the sustainability of mixed enterprises  related SHGS in Tamil Nadu with an intention to find out the extent of sustainability at different levels.  The study was conducted in Dharmapuri District of Tamil Nadu. Five blocks namely Dharmapuri, Harur, Morappur, Nallampalli, and Pennagaram were selected from the district based on maximum number of SHGs.

The backwardness and underdevelopment of our rural areas have drawn the attention of not only the planners but also those who are interested in the overall development of the India. The numerous schemes have not appreciably raised the living standard of the rural masses. Adoption of traditional agricultural technologies, lack of knowledge of improved practices, in sanitary conditions, inadequate housing and educational facilities are serious challenges faced by the rural masses. Unless we devote our efforts towards this cause, the chances of improvement of rural areas are remote in the near future.  The youth, who are the citizens of tomorrow have a vital role to play.  Youth reflect the national potentiality and represent the life blood of a nation.  Development of youth determines the future of the community and the country as a whole. As psychologists say, youth possess dynamic energy, creative activity and adventurous spirit and undergo physiological and psychological changes as they grow. In agriculture, due to small holdings, erratic rainfall, unrealistic market and price for the produce and meager income from crops, youth farmers are taking up dairying and sericulture as subsidiary enterprises which provide additional income and gainful employment to them as members of farm families throughout the year.  Young members of farm families play an important role in managing these enterprises. A study was  undertaken to know the role of youth in milk and silk farming.

The coastal zone of Karnataka is marked by highly fragmented agriculture land with more than 70 per cent of the land holders belonging to small and marginal farmer categories. Though the average annual rainfall received in the zone is 4000mm, the kharif season crops suffer from submergence and lodging.  The rabi/summer crops fail due to low soil residual moisture because of high percolation loss and poor water holding capacity of soils. Thus, the returns from the land is very less resulting in migration of youngsters mainly to the Arab countries as well as the neighbouring states in search of a job. In this situation, University of Agricultural Sciences, Bangalore through Extension Education Unit, Mangalore has demonstrated the Integrated Farming Systems (IFS) in Udupi and Dakshina Kannada districts to show that the IFS is profitable, sustainable and can secure the livelihood. The demonstrations were taken up in each farmer’sfield continuously for three consecutive years.

To analyze the impact of these demonstrations, case studies of three IFS demonstrated farmers were done during 2007 with the objective of documenting the farming systems demonstrated and the current farming systems practiced by the farmers; to analyze the income and employment generated and their impact on their socio-economic status. The yearwise documentation of the subsystems of the farming systems practiced by each farmer and the net income, percent increase of income over benchmark year, employment generation, cropping intensity, B:C ratio were analyzed. The results of the case studies are presented below.

Planning Research and Action Institute, Lucknow (1960) found that lack of initial capital considerably hindered the growth of Animal Husbandry Projects in Youth Clubs. It was also revealed that involvement of non-official agencies and training of youth organizers were very important for strengthening youth clubs.
Singh and Prasad (1963) identified that following deficiencies in the working of youth clubs.
    1.    Inadequate knowledge of youth club work on the part of members as well as on leaders
    2.    Non-availability of literature on youth clubs
    3.    Lack of active leadership‘
    4.    Rift between village youth clubs and village panchayat
    5.    Lack of proper guidance and follow up of youth club programme
Behniwal (1964) revealed the following factors as responsible for the successful working of youth clubs.
    1.    Strength of membership in a club 
    2.    Participation in project work
    3.    Participation in games
    4.    Frequency of meetings
    5.    Attendance in tours, rallies and games
    6.    Actual gains received  
Kumar (1965) found that in the successful clubs the youth had clear conception of the importance and objectives of the youth organization. 

In recent years, rainfall pattern is changing and the sustainability of irrigated rice ecosystem is threatened by water crisis. Tanks are often not filling or partially filling due to insufficient rains. In order to safeguard the food security, it is necessary to preserve previous water resources and to utilize the limited water most efficiently. In this regard alternate ways of growing rice using minimum water must be explored. Farmers are adamant to grow paddy crop to meet their domestic needs of food and fodder. In such situation Jalasri method can became one of the alternative for paddy cultivation. The Jalasri method is an appropriate system aimed at reducing the cost of cultivation, saving irrigation water, besides increasing grain yield significantly. Earlier Jalasri method was popular as Madagascar method of paddy cultivation.

1. Success Story of Rural Youth in Dairying
 
M.S. Nataraju, P. Sunil Kumar and R. Shashidhar

There is a proverb in Kannada that “Koti Vidyeginthaloo Meti Vidyee Yee Melu” means - among all the professions for livelihood on this earth agriculture is the best profession for better livelihood.  This proverb suits Sri. Vasudeva Indraje, resident of Yenmoor village in Sulliya Taluk of Dakshina Kannada Dist. in Karnataka State. Sri. Vasudeva Indraje is a role model for today’s youth, who are neglecting agriculture and migrating to cities with an illusion of making a quick buck.  Hailing from an agricultural family his moorings was in agriculture and allied activities.  After passing out from SSLC he did not seek to continue the studies but showed interest in pursuing some small business.  Along with his younger brother he started a cold drink house in Balila and made good profit from it.  When it appeared that the business was seeing a downward trend he came out of the business and invested the money in farming land.

Sri. Vasudev along with his friend visited RUDSETI, Ujire and enquired about the training programmes. After going through his interests Director suggested him to apply for Dairy and Vermicompost training programme.  Later, he was selected and undergone Dairy and Vermicompost training programme in the year 2007.  During his training programme along with the technical inputs regarding the Dairy management he also learnt about different soft skills like how to develop entrepreneurship competencies? How to develop Self Confidence? How to avail Institutional Credit? etc.

All living organisms are basically made up of chemical components. The chemistry, composition and energy management of living organisms is what we call biochemistry. It tries to explain life processes at the molecular level. Although different organisms differ outwardly in their life processes, there are striking similarities in executing the different tasks. Genetic code, metabolic pathways, enzymes, coenzymes and even regulatory mechanisms are similar to a large extent in all the living organisms. Living organisms have certain extraordinary properties. They can grow, respond to stimuli and replicate themselves with high fidelity. All these activities are ultimately interpretable in chemical terms. The components that constitute organisms are all inanimate. The lifeless organic molecules with appropriate complexity and properties make a living being.

Biochemistry helps us understand how the inanimate molecules that constitute living organisms interact with each other to maintain life. The basic life processes or the biochemistry remains broadly the same in either the unicellular microorganism or the higher organisms such as the plants or the human beings. Life is nothing but thousands of ordered chemical reactions. In other words, chemistry is the logic of all biological phenomena.

An amine reacts with a carboxylic acid to form an amide. Similarly, the amino group  on one amino acid molecule reacts with the carboxyl group of another amino acid  to form a compound called peptide. A peptide bond is an amide bond that forms when the –COO- group of one amino acid reacts with the -NH₃+ group of another amino acid. The resulting compounds are called peptides. Even after this there is a reactive amino group and a carboxyl group in the peptide. If these groups react further a poly peptide can form and later a polymer called protein can form.

Plants are responsible for highly useful molecular reactions. All the enzymatic  reactions  that  occur in the cell are  termed  as metabolic reactions.  They  take place within organisms in an orderly and regulated way.  They  are  the  metabolic pathways and the compounds  resulting from the process, namely,  metabolism are called  the metabolites. Metabolism in Greek means change. It is the set of life sustaining chemical transformations within the cells of living organisms. These enzyme-catalyzed reactions allow organisms to grow and reproduce, maintain their structures, and respond to the environments around them.
 
Metabolism is a highly organized,   coordinated and purposeful enzymatic activity inside a cell. Metabolism has four functions: 1. To obtain energy from the environment, 2. To convert molecules into building blocks, 3. To convert the building blocks into proteins, lipids, sugars, nucleic acids and other cell components and 4. To synthesize and degrade organic molecules for specific needs of the cell.

Plants can synthesize all the 20 amino acids, which include essential and non-essential amino acids. They can be degraded by removal of the amino group and conversion of the remaining skeleton to useful metabolic intermediates which participate in the synthesis of glucose and other ketone bodies.
 
Biosynthesis of amino acids
 
The biosyntheses of amino acids have an important feature. Their carbon skeletons come from intermediates from glycolysis, pentose phosphate pathway and citric acid cycle etc. The biosynthetic pathways depend on the intermediates from which they are derived. The primary amino group normally comes from the transamination of glutamate. Glutamine synthetase is a central control point in nitrogen metabolism, since glutamine is the amino group donor in the formation of many biosynthetic products as well as being a storage form of ammonia. Glutamate is the precursor of proline, ornithine, and arginine. Serine, cysteine, and glycine are derived from 3-phosphoglycerate. Glycine is synthesized from serine by removing CH2OH group. Tyrosine is synthesized from phenylalanine. Asparagine and glutamine are amides that are synthesized from aspartate and glutamate.

Plant hormones (phytohormones) are chemicals that regulate plant growth and are termed as ‘plant growth substances’. Plant hormones are signal molecules produced within the plant, and are present in extremely low concentrations. Hormones regulate cellular processes in targeted cells. Hormones also determine the formation of flowers, stems, leaves, the shedding of leaves, and the development and ripening of fruit. Every cell is capable of producing hormones in plants. They shape the plant, affecting seed growth, time of flowering, the sex of flowers, senescence of leaves, and fruits. Plant hormones affect gene expression and transcription levels, cellular division, and growth.They direct which tissues grow upward and which grow downwards. Hormones are vital to plant growth. Hence, they are also known as growth factors or growth regulators.

Present work was aimed to determine the antibacterial activity and minimum inhibitory concentration (MIC) of active crude extracts of selected cyanobacterial species. Nine cyanobacterial strains viz. Anabaena variabilis, A. fertilissima, Nostoc muscorum, N. punctiforme, N. linckia, N. commune, Spirulina platensis, Westiellopsis prolifica and Hapalosiphon sp. belonging to family; Nostocaceae, Oscillatoriaceae and Stigonemataceae were selected from the herbarium of Indian Agricultural Research Institute, New Delhi, and maintained in BG-11 growth medium throughout the study in the laboratory.

Abstract

Wheat is unique among cereals because of its ability to form viscoelastic dough. Variety of products such as leavened and unleavened breads, pasta, cookies, and breakfast cereals are prepared using wheat. The viscoelastic property of dough is mainly due to the presence of gluten proteins viz., gliadins and glutenins. Variations among these proteins play a significant role in determining the quality of wheat. Although considerable studies have been carried out on quantity and quality of protein and their relation to bread quality, very little work has been reported on their relation with quality of Indian traditional products like chapati and tandoori roti. Results indicate that ratio between gliadins and glutenins are important in determining the chapati quality. It has been found that varieties having 5+10 HMW glutenin subunits with IBL/ IRS chromosomes are more suitable for the preparation of chapati and roti. This article is focused on the relation between protein and its subunit composition and the quality of chapatti and roti quality.

Abstract

Adulteration refers to a process by which the quality or the nature of the given substance is reduced by the addition of foreign or an inferior substance, removal of vital component, packing and storage under harmful conditions, insect infestation, poisonous material, undesirable chemicals and unintentional contaminants. All these change in food whether intentional or unintentional are covered under food adulteration. In cereal grains adulteration results by incidental contamination during the period of growth, harvesting, processing, transport, and distribution and results in various health hazard, sand, marble chips, earth and filth are also adulterants in grains. Pest and pesticides residues are also hazardous.

Abstract

High moisture paddy can be dried in a trolley drier at farm level/grain market to reduce losses during various post harvest operations. During last two paddy harvesting seasons quality analysis of eight, most popular varieties of fresh paddy arrivals from about 40 grain markets, scattered all over Punjab, was performed. Monitoring of paddy in grain markets showed that maximum number of samples (62.7%) was in the range of 12-18%, moisture content (w.b.). Over-dried paddy samples (<12% m.c., w.b.) were only 9.1%. The samples with more than 18% m.c ,w.b. (high moisture paddy) were 28.2%, which have to be dried to safe moisture levels. Milling characteristics of the analyzed samples indicated that the broken percentage was highest (25.5%) in PR-113 followed by PR-111 (20.6%) and minimum in Pusa-44 (12%). The highest insect- pest infestation (Sitotroga cerealella (olivier) was observed in PR-108, followed by PR-116, PR-113, PR-111, Lal Mundi, Govinda, PR-114 and Sharbati. The Mycoflora isolated and identified were Aspergillus, Penicillium, Mucor, Rhizopus, Alternaria, Curvularia, Helminthosporium and Cladosporium spp. Maximum fungal infestation were associated with samples of PR-108 variety. To avoid further proliferation of mycoflora and inset pests, paddy should be dried to safe moisture levels for further storage and processing. For this, a trolley drier has been developed by converting a conventional farmer’s tractor trolley, into a portable drier, which can reduce 5% moisture of 1 tonne batch of paddy in about 100 minutes, consuming 56 kWh of electrical energy

Abstract

The establishment of All-India Coordinated Wheat Improvement Project in 1965 coincided with the introduction of high yielding semi-dwarf wheat varieties. Since then India has made very impressive progress in increasing wheat production over the past three and half decades. India now ranks as the second largest wheat-producing nation in the world. In fact from a state of “Ship to mouth” in 30 years or so India has become a nation of surpluses. The significant contribution made by the project in helping the increased wheat production cannot be ignored. Through coordinated research and development, nearly 200 wheat varieties have been developed during the last 35 years in India. However, only a small number of them produced without backing of specific quality breeding programs excel in quality traits also. The increasing demand of baked and pasta products in the country along with economic liberalization and global trade have offered opportunities for better utilization of the surplus wheat. Thus, in the current decade and beyond, wheat quality needs uppermost attention to meet the trade requirements for domestic and export purposes. Therefore, there is a need to reorient the wheat improvement programs in the country.

Abstract
 
Technological advancement, increased urbanization, awareness and interest of consumer for variety products have given a great challenge to the food sector to develop inexpensive foods that are nutritionally superior and acceptable to the intended consumers. Keeping this objective in view, we have made an attempt to develop technology for variety products from wheat and corn and suitability of available varieties judged. With the emerging trends of food market towards fast foods, there are vast prospects for efficient utilization of cereals by exploring varieties products. A steamed bread (a Chinese traditional product) and Tortilla and corn chips (Mexican snacks) were developed. Steamed bread is defined as the product resulting from cooking or steaming fermented dough. Recipe and method for its preparation was standardized. Nutritionally rich steamed bread can be prepared by supplementing 10% level of chickpea and defatted soybean flour. Corn snacks have become a prime target of some consumer advocates and nutritionists who have referred them as a source of ‘empty calories’. But reality is that these snacks provide instant energy, as they are rich storehouse of nutrients. Process and recipe for the preparation of Tortilla and corn chips from Indian maize were standardized. The quality and acceptability of these snacks were worked out and found that these products were highly acceptable. Indian consumers have versatile taste, so these products will be readily accepted in Indian market. 

Abstract

Pulses constitute an important component of the diet and are a major source of protein in vegetarian diet. India has largest area under pulse cultivation and produces a variety of pulses. A large portion of this produce gets spoiled due to insect and fungal attack. A variety of insecticides and fungicides are used for the control of pest during storage. There is an increasing trend towards the reduction in the use of pesticides in storage due to strong demand from consumers to choose food with no pesticide residue, development of insect resistance to pesticides and the impact of pesticides’ use on environment. All these have posed a challenge to refine the existing management procedures of storage and commodity to find the optimal solution. Controlled/ Modified Atmosphere storage offers an alternative to the use of pesticides extends storage life and maintains product quality. The Controlled/Modified Atmosphere is created by altering the composition of the atmosphere in terms of CO2, O2, and N2 concentration. High CO2 produce undesirable conditions for insects and microbes and thus control their activity.

Abstracts

About 60-70% of total food grain production is retained and stored by farmers for household consumption, use as seed, feed for cattle and payment of wages to labours etc. in our country. Yet the quality of grains stored is not so good, and hence, preserving the harvested crops without loss or damage has always been a problem of national importance. This study was conducted in Jabalpur district of Madhya Pradesh state. A tribal block namely Kundam was selected for study purpose. The responses of 120 women were recorded in pre-tested structural schedule through interview. Rural women are an important source of information on the use of indigenous practices for grain storage. The data reveals that the majority of respondents are using dry leaves of Neem, dry onion bulb, wheat straw, Nirgudi leaves, roots of bach etc. for storage of grain at household level. In our country, indigenous practices of grain storage have always been and are still followed, because it is supposed that these practices are useful in control of grain loss.

Collection and preservation of insect specimens is the best way to study their morphology, habitat, distribution, host relationship and many other interesting features. Killing, mounting and arranging the insects in some particular sequence creates much more interest than merely studying museum specimens or looking at pictures. A collection of varied types of insects goes a long way in increasing the knowledge and understanding of the taxonomy of insects.

Not all insects are found in every season and in every place. Their presence mostly depend on the availability of the host, as well as the climatic conditions. Though many insects can be collected in any season, they  are  naturally  abundant  in  moist,  warm  weather,  especially  in the  spring and early summer. To get a good collection, insects have to be collected continuously in all the seasons of the year, from all plants and plant parts, from stored grains and food products. Several types of butterflies, moths, bees, wasps, beetles and flies can be collected from flowers, which they frequent to collect nectar. Many insects can be collected from leaves, stems, fruits, roots and such plant parts. Many insects are found in water and on water plants. Some are found in barks of trees or in decomposing organic matter. These insects have to be collected from different localities where they are found. Most of the insects are diurnal, while some of them are nocturnal. Some are attracted to light. So, a knowledge of the habits of insects is important in making a good collection. Sometimes better specimens may be obtained by collecting the immature stages and rearing them into adults wherever possible. Keeping records of pest collections may help Entomologists to forecast largescale pest occurrence.

The mites belong to the Class - ‘Arachnida’, Order - ‘Acarina’. Most of the phytopathogenic mites are classified under the two Families - Tetranychidae and Eriophyidae.

The mites belonging to the Family - Tetranychidae are generally known as Tetranychids. They are very minute, and less than 100 microns in size. The body is non-segmented and the head, thorax and abdomen are  not distinct, but rather fused together. The life cycle of a tetranychid mite consists of an egg stage, three nymphal stages viz., protonymph, deutonymph and tritonymph and an adult stage. In the protonymphal stage, which is also called the larval stage, the mites have only 3 pairs of legs. In all the other nymphal stages and the adult stage they have 4 pairs of legs. The mites are roundish or oval in shape, with biting and chewing, as well as piercing and sucking type of mouthparts (Fig.190).

Introduction: Most young rabbits will be used for meat and skins; some will be kept for breeding. Whatever they are used for, the rabbit keeper will benefit if they are well cared for.

Handling of Rabbits: There will be times in any rabbitry when the animals will have to be picked up, e.g. when a doe is moved to a breeding hutch or when young rabbits are weaned.

When it is necessary to pick up a rabbit for any purpose, the aim should be to cause it no discomfort and to prevent it struggling. So it must be handled gently but firmly. There are three ways to hold a rabbit according to its size. 

A suitable site for housing is very important. It is better to select a site which has good drainage, adequate shade like under trees, and with sufficient surrounding space from strong winds. Basically the shelter must protect rabbits from extreme temperatures and predators like snakes, mongoose, dogs and other animals.

Rabbits can be raised inside the building also or outside in hutches with a protective roof. A hutch is a small building containing cages for housing a few rabbits (6 to 12) a back-yard scale. They are generally made of wood or stone one and chicken wire mesh. The floor may be made of a stronger ranger mesh or soil floor bedded with straw. Hutches can also be constructed with local building materials such as tree and woven split bamboo, etc.

Cereal Processing

    1.    The protein content of wheat grain varies widely, but for bread making a value of at least 11% is required.

    2.    Low grain sulphur will result in low concentrations of the sulphur-containing amino acids, cystine and methionine, and may result in poor loaf volume.

    3.    During seed germination endosperm starch is converted into soluble glucose and maltose to support the developing embryo. This is brought about by enzymatic activity, especially the enzyme a-amylase.

    4.    Excessive a-amylase levels result in the formation of a darkened loaf crust as a result of sugar caramelization and a sticky crumb structure which can cause problems during slicing.

    5.    Wheat with a protein level below 10% is preferred to reduce gluten elasticity.

    6.    There is a very good correlation between grain nitrogen and the amount of malt extract achieved, low grain nitrogen giving more fermentable extract

    7.    The term ‘coarse grains milling’ is a very broad one that refers to the comminution of the berries of the wheat, barley and other coarse grain crops.

Meat and Meat Products

    1.    Meat can be defined as “the muscle tissue of slaughter animals”.
    2.    meat is composed of water, fat, protein, minerals and a small proportion of carbohydrate

A. Answer the following.

Q.1.     What is the difference between cell wall of Gram positive and Gram negative bacteria ?
Ans.     The cell wall of Gram positive bacteria is largely composed of peptidoglycans. These are chains of alternating N-acetylglucosamine and N-acetylmuramic acid cross linked by short peptide side chains. On the other hand, the cell wall in Gram negative bacteria has thinner peptidoglycan layer, an outer membrane composed of a polysaccharide-lipid-protein structure. The oligosaccharide attached to a lipid (lipidA) and a series of repeating trisaccharides. The polysaccharide antigens are called ‘O’ antigens. The cell wall lipopolysaccharides of Gram negative bacteria are also called endotoxins.

A. Answer the following.

Q.1.     What are the different enzymes used to couple with antibodies to prepare conjugates for use in ELISA?
Ans.     HRPO, Alkaline phosphate, b galactosidase, penicillinase etc.

Q.2.     What does it indicate if any woman has HI titre of > 10 for rubella ?
Ans.     It means that the woman is immune to rubella. If it is less than 10 it indicates that the woman needs to be immunized against rubella.

A. Answer the following.

Q.1.    What is nude mouse ?
Ans.     Nude mice are strain of hairless  mice that fail to develop functional thymus and  devoid of CMI.

B.  Write true or false.

Q.1.     Individuals who fail to develop a functional T cell system will die from viral infections.
Ans.    True.

Q.2.    Individuals who fail to develop a functional B cell system will die from bacterial  infections.
Ans.    True.