eChapters

Introduction

Climate change and climatic variability are expected to reduce agricultural productivity and threaten food security of the world, particularly in developing countries. Producing enough food for the increasing population in a background of decreasing resources and a changing climate scenario, is a challenging task. Agriculture, forestry and land use change account for about 30% of greenhouse gases (GHGs) emissions. Therefore, mitigation of GHGs emission while enhancing production is another challenge in agriculture.
 
Conservation agriculture (CA), with the three core inter-linked principles of minimizing mechanical soil disturbance, enhancing organic matter cover on soil and diversification of crops, is a viable option for sustainable agriculture with an effective solution to climate change adaptation and mitigation. The principles can be integrated and applied into most of the rainfed and irrigated production systems including horticulture, agro-forestry, organic farming, rotational farming and integrated crop-livestock systems to strengthen ecological sustainability. Worldwide about 105 Mha land is under CA and the area is increasing. However countries like USA, Brazil, Argentina, Canada and Australia occupy about 90% of the area under CA. The CA, which is advocated as an alternative to the conventional production system for improving productivity and sustainability, is now adopted by many countries and agencies as a lead model for sustainable agricultural intensification.

Introduction

Cycling of plant material is required for any production system for biological activity, humus formation and thereby formation of a dark colored top soil. Incorporation of biomass results in production and proliferation of soil biota. But under annual crops compared to forest, production is much less, the biomass is largely removed, the soil is tilled several times each year. Consequently, less food and moisture are available for earthworms, insects, micro-flora and fauna; and their habitats are repeatedly disturbed or destroyed. Therefore, the primary need of our agricultural activities is to feed soil organisms (bacteria, fungi, earthworms etc.) and to regulate their living conditions while protecting them from chemical and mechanical impacts.

Introduction

Agriculture is the most important sector in India accounting for 13.7 per cent of the country’s GDP and employs more than 60 per cent of the labour force. Our country has recorded the highest food grain production of 257 million tonnes during 2012-13, under favourable weather conditions those prevailed throughout the year. The mission of increasing food grain production, though realized to a commendable extent at present, but under risk due to climatic aberrations and reduced availability of land, water, nutrients along with poor and continuous degradation of the resources to cope up with the demands of increasing population. Although the country had attained self sufficiency in food grain production through intensification of agriculture with high–yielding varieties, fertilizer application and chemical pest control during the green revolution, productivity is still low and is stagnating.

The Global Environmental Issues

 
Expansion of the scale of human activity in recent years has put so much strain on the natural environment of this planet that in some cases nature can no longer recover. The nature’s ability though recovers damage or harmful effects in one part of the world do not stop in the very area and keeps going beyond national borders and become environmental problems on a global scale, but in a limited manner.

Energy, food production and various other natural resources are the limiting factors on this earth. The result of this bitter truth has been published in a book titled ‘The Limits to Growth’ in 1972. If the enormously growing population and the industrial process is not checked, then the earth’s civilization may come to an end within next hundred years.

By considering the space travel, we can very well understand about the Ecosystem. When we go away from the biosphere, it will be appropriate to develop unlimited environment through the energy accumulated from the sunlight in space. For the space travel for some days to moon and back to earth, we need not establish the entire ecological system as greater quantity of O₂ and food stuffs can be stored and CO₂ and other unwanted materials can be fixed for establishing space colonies, we have to build a special space ship with important abiotic components which can be recycled for use again and again. The vital processes of production, consumption and decomposition can be established and balanced through biotic components. In other words we are creating a complete mini human ecological machine. Before we established this system, we should be quite familiar about the space problems and its implications.

HUMAN POPULATION GROWTH

The evolution of man took place about one million years ago in response to changes in the physical environment. We learnt gradually to adapt different modes of life to varying environments and migrated different parts of the world. Human activities have had their impact on the environment, which was depending on the number of people living in  the area and  their level  of economic development. Per capita consumption of food, energy and other resources in developed countries is larger and its impact on the environment is much greater than equal number of persons living in developing countries in Africa or Asia. Therefore, the distribution of population needs to be examined in detail.

Continental drift is the theory that continents move slowly about the earth’s surface, changing their positions relative to one another and to the poles of the earth. It includes the idea that former continents may have broken apart and that the fragments have recombined in different patterns (Fig. 15.1). Some authorities have considered that this happened only once, beginning within the past 200 million years; others believe that it has long been a continuous process, so that all existing continents are mosaics. Those who accept the theory believe that the rates of motion have been only a few inches a year. Earlier, it was considered that the continents moved like ships through a slightly plastic ocean floor. Today some consider that the continents are frozen into the earth’s surface like rafts in ice, and that the motions are the result of growth of the sea floor along certain midocean ridges and reabsorption of the sea floor elsewhere beneath deep ocean trenches and young mountains. The continents are carried passively about embedded in moving plates of the surface. Some authorities  now  agree  that  there  is  a  deformable  layer,  called  the asthenosphere, at depths of from about 50 to 400 kilometers within the earth. It is white hot, and slightly viscous, and many believe that the surface can break into plates which slide over it.

The phenomenon we call tsunami is a series of large waves of extremely long wavelength and period usually generated by a violent, impulsive undersea disturbance or activity near the coast or in the ocean. A tsunami is a very long-wavelength wave of water that is generated by sudden displacement of the seafloor or disruption of any body of standing water.  Tsunami are sometimes called “seismic sea waves”, although, as we will see, they can be generated by mechanisms other than earthquakes.  Tsunami have also been called “tidal waves”, but this term should not be used because they are not in any way related to the tides of the Earth.  Because tsunami occur suddenly, often without warning, they are extremely dangerous to coastal communities.

It is a well known fact that natural disasters strikes countries, both developed and developing, causing enormous destruction and creating human sufferings and producing negative impacts on national economies. Due to diverse geo-climatic conditions prevalent in different parts of the globe, different types of natural disasters like floods, droughts, earthquakes, cyclones, landslides, volcanoes, etc. strikes according to the vulnerability of the area. India is considered as the world’s most disaster prone country. It has witnessed devastating natural disasters in recent past like droughts, floods, cyclones, earthquakes, landslides, etc. 

Pesticides are used to control plant growth (herbicides), insects (insecticides), worms  (vermicides), bacteria (bacteriocides), fungi (fungicides), and other organisms. Almost without exception, pesticides are used to benefit humans by the control of unwanted species of plants (e.g. weeds in a lawn), disease-causing bacteria (e.g., Pneumococcus, the causative agent of pneumonia), disease-carrying insects (e.g. malarial or yellow fever mosquitoes) or in controlling destruction of agricultural products by disease-causing organisms (e.g., corn-borers, the virus of anthurium blight). Although they are by and large mostly beneficial, pesticides used both properly and improperly are also “resources out of place”, that is pollutants, that are subject to normal ecological processes.

For the hundreds of thousands of years that we lived on earth,there were few rapid changes in the atmosphere. It is only in recent times, particularly since the Industrial Revolution, that our activities on earth began to modify our environment in a significant manner.  Industrial pollution has affected the water we drink, the air we breathe, and in general,the biosphere itself.Now noise has joined the bandwagon of pollutants.

Noise certainly comes within the scope of definition of a pollutant that “..... any undesirable change in the physical, chemical or biological characteristics of our air, land and water that may or will harmfully affect human life or that of any other desirable species or industrial process, living conditions or cultural assets, or that may or will waste or deteriorate our raw material resources.”

Soil pollution happens when we destroy the thin layer of healthy and productive soil, which covers the earth’s surface. Most of the world’s food is produced using this resource and if we don’t protect it the world’s farmers will be unable to grow enough food to support the worlds people.
 
Healthy soil depends on bacteria, fungi, and small animals (such as worms) to break down wastes in the soil and release its nutrients which help plants grow. The over use of fertilizers and pesticides can limit the ability of soil organisms to process wastes, which in turn makes the soil less productive or in the worst case scenario useless or even poisonous. 

Water is indispensable for our life. About 2/3 of earth is covered with water. No organism can survive without water. So keeping water free from any pollutant is very important. Water is said to be  “polluted” when it is hanged in its quality and composition directly or indirectly by man’s activity so that it becomes less suitable for drinking, domestic, agricultural or any other purpose. Polluted water transmits a large number of diseases in man. They are cholera, typhoid, dysentery, jaundice and other bacterial or viral diseases.  Water becomes polluted by the presence or addition on inorganic or organic substances or biological agents. Soil erosion, leaching of minerals from rocks, decaying of organic matter are natural sources of water pollution. There has been an alarming increase in the degradation of water quality in the recent past in the large cities and industrial areas.

Water pollution can be studied under the following heads—  (i) medium in which it occurs (surface water, ground water); (ii) habitat (lakes, estuaries and open seas); and (iii) type of pollutants (bacterial, metallic, thermal and radioactive).

The ozone layer is a region in the Earth’s stratosphere where a certain amount of incoming solar radiation is absorbed. Over the last twenty years or so a series of man-made threats to it have been reported and each has been treated  with more gravity than the last. Now a-days such threats feature  regularly on the agendas of international conferences.

Ozone, Positive and Negative : Ozone, or trimolecular oxygen (O3) can be advantageous or exert harmful influence on human health, as well as that of other organisms. It is all depends on whether it is present in the troposphere or stratosphere (Fig. 8.1). In the stratosphere, ozone is a beneficial serving as a shield in screening out most of the damaging portions of ultraviolet radiation which have wavelengths between 290 and 320 nanometers. In the troposphere, ozone is a negative as it appears as a component of smog with a number of deleterious effects, as will be discussed below.

El Nino is the name given to the occasional development of warm ocean surface waters along the coast of Ecuador and Peru. When this warming occurs the usual upwelling of cold, nutrient rich deep ocean water is significantly reduced. El Nino normally occurs around Christmas and lasts usually for a few weeks to a few months. Sometimes an extremely warm event can develop that lasts for much longer time periods. In the 1990s, strong El Ninos developed in 1991 and lasted until 1995, and from fall 1997 to spring 1998.

The ‘greenhouse effect’ earns its name from the rough similarity between the way it works and the way the glass of a greenhouse works. Glass too, is transparent to short-wave radiation but opaque to long-wave radiation, so the greenhouse traps heat.
Carbon dioxide plays a critical role in controlling the Earth’s climate because as an aerosol it absorbs and reflects or scatters incoming radiation on the one hand and absorbs and reradiates outgoing infrared radiation on the other. This latter phenomenon results in what is popularly called the Greenhouse Effect, an analogy to what happens in a greenhouse.

Air is one of the most important constituents of man’s environment. It is calculated that a roan breathes about 22,000 times a day inhaling about 16 kg of air by weight. Air is present everywhere and its entrance from one place to another cannot be checked. Clean and pure air is very essential for the health and survival of man.

Any living organism in its natural habitat is called a wildlife. It may be plant animal or a microbe. The significance of wild life lies in setting up the balance of population in nature by maintaining food chains and food webs. It acts as the gene banks in relation to breeding of plants and animals for introduction of desirable characters such as high yield of economic product and resistance to diseases. The scientists are performing studies to screen and select useful genes in economically important organisms.

Conservation has always been one of the most important applications of ecology.Unfortunately, the term “conservation” suggest “hoarding”, as if the idea were simply to ration static supplies so that there would be some left for the future. In the eye of the general public the “conservationist” is too often presumed to be an antisocial person who is against any kind of “development”. What the real conservationist is  against  is unplanned  development  that breaks  ecological  as  well as human laws. The true aim of conservation, is two fold–
    
(1)     To ensure the  preservation of a  quality  environment that considers esthetic and recreational as well as product needs; and  
    
(2)     To ensure as continuous yield of useful plants, animals and materials by establishing a balanced cycle of harvest and renewal.

“Natural” means an ecosystem not influenced by man and resources means that reserve stock of supply which living things can take from nature for sustenance of life. In reference to man, natural resources can be defined as those natural reserve stocks of supply which man utilizes for his sustenance and welfare. The reservoirs of natural resources are the sun,  the  atmosphere,  the  lithosphere  and the  hydrosphere.  Natural resources include energy, air, water, soil, minerals, plants and animals. The nature of resource depends upon many factors such as scientific and technological development of the society, profession of that particular society, and culture.

We are entering an era when certain environmental conditions will exert a degree of concern which has never been before encountered by man in the course of human history.

The survival of human beings depends on the realisation that they have to live in harmony with the various elements of the environment which are interconnected.
    
(i)     An understanding of the components and processes which takes place in the environment.
    
(ii)     The relationship between different abiotic and biotic components and the assessment of resources with reference to needs of people in a region is essential for their survival.
    
(iii)     A reduction in rate of growth of population in developing countries and a reduction in consumption of resources by developed countries would lead to a balance between population and resources. In this manner, the awareness of the problems faced by environment would enable people to take appropriate decisions. This makes the earth habitable for future generations.

Abstract

Chhotanagpur plateau is well-known for its quality vegetable production, however, indiscriminate uses of chemical fertilizers and pesticides in different vegetables lead to more yields but of their inferior quality of produces. The over uses of agro-chemicals also drastically affect the soil bio-physico-chemical properties. In this context, an alternative approach was taken into account through present study in order to address such problems. For the purpose, cabbage cv. Golden Acre was grown in organic experimental plots of the university by using ‘Sasyagavya liquid organic formulation’ to observe its effects over the crop and soil bio-chemical properties of the experimental site.Theexperiment was designed after CRBDby adoptingseven treatments i.e.T1: 1% Sasyagavya; T2: 5% Sasyagavya; T3: 10% Sasyagavya; T4: 15% Sasyagavya; T5: 20% Sasyagavya; T6: 25% Sasyagavya and T7: Absolute Control withtheir three replications. Different growth, yield and quality attributes of the crop and soil bio-chemical properties of the experimental soils were studied. 

Abstract 

A field investigation entitled, “Studies on growth and yield of aerobic rice in summer season under various moisture regimes and planting techniques in upland condition” was carried out at Regional Research Station, Gayeshpur, Nadia, West Bengal of Bidhan Chandra Krishi Viswavidyalaya. The field experiment was laid out in a split plot design with three replications. The treatment consisted of three irrigation regimes in main plots viz., IW/CPE =1.0, IW/CPE =1.5 and IW/CPE = 2.0 and four treatments on planting techniques in sub plots viz., P1: Sprouted seeds, P2: Non-sprouted seed, P3: Soaking seeds overnight (12 hrs), P4: Soaking seeds overnight (12 hrs) followed by shade drying.

Abstract

A field experiment was conducted in an aericendoaquept (pH, 6.67; organic carbon,  CEC,) to study the relative efficiency of different organic manures on the changes in some selected soil properties growing rape (cv. B-9) in a randomised block design replicated thrice using different combinations of organic and inorganic chemical fertilizers (T1- NPK 100%, T2- Compost 100%, T3- Compost 50% + NPK 50%, T4- Vermicompost 100%, T5- Vermicompost 50% + NPK 50%, T6- FYM 100% and T7- FYM 50% + NPK 50%). However, the objectives of the study was to assess the relative efficiency of organic manures with respect to availability of nutrients in relation to yield of rape affected by combined application of organic manures and chemical fertilizers. The results show that the amount of available N, organic carbon content, CEC and K contents were found highest in the treatment T5 where Vermicompost 50% + NPK 50% was applied combinedly.

Abstract

In view of the fast depletion of ground water reserves, uncertainty of rains and growing food demands due to human population explosion, efficient use of water available for crops has become highly relevant. In recent years, the use of superabsorbent polymers (saps) has been viewed as an innovative tool to improve water use efficiency in agricultural operations. Pusa Hydrogel, an indigenous superabsorbent hydrogel technology, has been developed for improving water use efficiency of agricultural and horticultural crops. They can absorb a minimum of 400 times of their dry weight of pure water and gradually release it according to the needs of the crop plant. So, it is used as soil moisture conservator and reduces number of irrigation. Because of their neutral ph, they do not affect nutrient availability, soil chemical composition, action of other agro chemicals, viz. fertilizers, herbicides, fungicides, insecticides, etc. Pusa hydrogels are found to improve the physical properties of soils. Increase in porosity results in improvement in seed germination and rate of seedling emergence, root growth and density, and reduced soil erosion due to reduction in soil compaction. It also increases biological/microbial activities in the soil, which increase oxygen/air and nutrient availability in root zone of the plant. So, ultimately it is helpful for increasing crop productivity. 

Abstract 

The on-farm programme on SRI was carried out in the village Narayanpur under RLI command area in Karimpur II Block of Nadia district in the year 2016 during summer season. The soil of farmland is clay loam and situated having latitude of 23°54’26.5"Nlongitude 88°30’24.1"Eat an average elevation of 9.75 m above the mean sea level. Monsoon ceases during October and cool season sets in by November. The average rainfall of this region is about 1500 mm and normal monsoon breaks in the first week of June. Though water resources in this area are generally satisfactory and 90% of these resources are tapped form the ground water source through deep and shallow tube wells. However, due to faulty crop planning and lack of scientific water management approach, a significant portion of agricultural area is identified as gray zone from hydrological point of view. Even many tube wells are becoming dry due to over exploitation of valuable water from the lower depths of confined aquifers. Rice is predominant crop during kharif season becoming less profitable because of high input costs involved. Summer rice gave satisfactory yield but also profitable proposition because of more input cost and less farm gate prices.  

Abstract

From very ancient time the farming was practiced organically without using any chemical pesticides or fertilizers. In the mid-19th century, the chemical farming was introduced and the adverse impact of chemical fertilizers and pesticides in agriculture is in sight with deterioration of soil quality, quality of food and so on.The indiscriminate use of agro-chemicals in different crops causes numerous health hazards as well. In this context, organic farming came into existence in 20th century due mainly to produce quality foods through the rapid change in agriculture sector. Therefore, an attempt was taken through present investigation to cultivate potato without using any synthetic agro-chemicals by employing Kufri Pukhraj cultivar during kharif season. Potato is basically rabi season crop but due to climatic advantages of the south Chhotanagpurplateau of Jharkhand it can successfully grow during kharif season too.

Abstract
 
The field experiment was conducted during rabi season at the Baruipur Research Farm of the Calcutta University using treatments as T1-NPK 100%, T2- Compost 100%, T3- Compost 50%+NPK 50%, T4-Vermicompost. 100%, T5- Vermicompost 50%+NPK 50%, T6-FYM 100%, T7-FYM 50%+NPK 50%, in a Randomised Block Design (RBD) replicated thrice.  The results show that the amount of available N content in soil  has been found to be increased with the progress of crop growth upto 45 days of crop growth and thereafter, the amount of the same decreased with the crop growth irrespective of treatments. The amount of P content in soil has been found to be increased with different treatments, being maintained highest amount (18.30 kg/ha) in the treatment Vermicompost 50%+ NPK50% followed by the treatment where 100% NPK and 100 % vermicompost were applied. The results show that the amount of K content in soil was increased initially and thereafter, the amount of the same decreased with the progress of crop growth.

Abstract

Jute is known as golden fibre of Bengal and the most important bast fibre of the world. Jute is a natural fibre crop and is second in the world after cotton in terms of global production, consumption and availability. It is a completely biodegradable, recyclable and eco-friendly lingo-cellulose fibre. The genus Corchorus belongs to the family Tiliaceae, which is composed of approximately 100 species. Two species (Corchorus capsularis L. and Corchorus olitorius L.) are widely cultivated for natural fibre. The field experiment was conducted in Pre-Kharif season of 2014 in Mondouri Research Farm, of Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal. This farm is located very close to the tropic of cancer having approximately 89º E longitudes, 23 º N latitude and about 9.75 in altitude above the sea level. The experiment was in a Factorial Randomized Block Design replicated thrice with first factor variety i.e. V1-JRC 321, V2- JRC 698, V3- JRCJ 2 and V4-NDJC 2011 and Second factor fertilizers with three levels i.e. F1-60:13:25, F2-80:17.5: 33.3 and F3- 100:21.8:41.7. The plant height was not significant at the harvest stage. 

Abstract
 
Rice fallows are those land which remain uncultivated during rabi after harvesting of kharif paddy. Several reason for not taking second crops such as early withdrawal of monsoon rains leading to soil moisture stress at planting time of rabi crops, water logging and excessive moisture in the months of November and December, lack of appropriate varieties of winter crops for late planting, and socio-economic problems like stray cattle, blue bulls etc. India accounts for 11.65 million ha (79%) of the total rice fallows of South Asia. The rice fallows offer good scope for area expansion of chickpea. The residual soil moisture left in the soil after rice harvest is often sufficient to grow chickpea in low to medium land soil. It is also beneficial for chickpea where short duration paddy grown which vacate fields in September-October. In long duration paddy, chickpea could be grown under Utera cultivation (relay cropping) in the states of Chhattisgarh, Jharkhand, Bihar, West Bengal, Orissa and Assam. Optimum plant population can only be ensuring in well levelled land, sufficient soil moisture and good seed under Paira (Utera) cropping. 

Abstract

The increase incidence of plant diseases have created challenging troubles in commercial agriculture and posed economical threats to both conventional and organic farming systems. To combat these problems there has been indiscriminate use of the synthetic chemicals that created different types of environmental and toxicological problems. Therefore attention has been directed towards exploitation of plant products or phytoextracts as novel chemotherapeutants in plant protection. Numerous botanical pesticides have been used globally and more has been discovered in due course of time. Pyrethroids, neem, etc are well established commercially as botanical pesticides and recently some essential oils of higher plants have also been used as antimicrobials as they are safe and widely accepted by the consumers. Use of phytoextracts may thus offer a new source of antibacterial, antifungal and antiviral agents against microorganisms. Botanical pesticides are best fitting for organic food production in industrialized countries and can plays greater role in the production and post-harvest protection of food products in developing countries.

Abstract 

Rainfed agriculture plays and will continue to play a dominant role in providing food and livestock for an increasing world population. Rainfed agriculture practiced on 80% of the world’ agriculture land area and generates about 70% of the world’s staple food including most of the food in poor communities in developing and least favoured areas. The most recent estimates have put global rainfed croplands at 1.75 billion ha (Bha) at the end of the last millennium, or about 5.5 times the irrigated area in the world . India ranks 1st among the countries that practice rainfed agriculture both in terms of extent 86 (mha) & value production. Agriculture water management deals with the administration of a key input to agricultural production & offers to hope that land and water use will be intensified .Scarcity of water resources and growing ofm competition for water many sectors reduces its availability for irrigation. Effective management of water for crop production in water scare area requires efficient approaches for increasing crop productivity and drought tolerance by genetic improvement and physiological regulation may be the means to achieve efficient & effective use of water. A single approaches would not be able to tackle the forthcoming challenge of producing more food and measures with engineering solutions (water saving ,irrigation method, deficit irrigation, proper deficit sequencing, modernization of irrigation system etc) and agronomic & soil manipulation (seed priming\ seedling age manipulation, direct or wet seeded rice. 

Abstract

The effect of watershed management programme was studied with introduction of new crop-cultivars including six rainy season crops namely direct seeded rice (drilled rice), transplanted rice, arhar, groundnut, sesamum and maize and two winter season crops namely mustard and wheat. The crop demonstration programme were undertaken for consecutive four years during 1988 to 1991 to utilize different land situations and for effective use of created irrigation potential at a drought prone tract of West Bengal (India). The results of the crop demonstration revealed that with selection of crops and its suitable varieties, adopting improved agronomic practices including scientific management of fertilizers and irrigation water, plant protection measures, the productivity of both land and crops markedly increased. The crop production strategy on the basis of land capability classification changed the land use, cropping pattern and crop intensity in the watershed area.

Abstract

Sundarban is the largest mangrove wetland ecosystems in the world. This World Heritage site along the Bay of Bengal has evolved over the millennia through natural deposition of upstream sediments accompanied by intertidal segregation. Indian part of Sundarbans is estimated to be about 4,110 square kilometres of which about 1,700 square kilometres is occupied by water bodies in the form of river, canals and creeks of width varying from a few metres to several kilometres, which together form the complex ecosystem of this Ganges delta.. Rivers in the Sundarbans are confluence points of salt water and freshwater. Environmental crisis is caused by severe cyclones sea level rise and storm surge followed by coastal erosion, flood and earthquake phenomenon. River water is saline. Shallow aquifer is brackish/ saline, which is not suitable for drinking. Fresh potable ground water is occurring in deeper aquifer, the exploitation of which is not cost-effective. Sundarbans houses around 500 different species of mammals, fish, bird and reptiles and it is the largest habitat of royal Bengal tigers. Conservation of flora and fauna in the typical ecosystem of Sundarbans in India with emphasis on judicious use of ground water resources along with retrospection of historical trend and future sustainable management strategies is a pre-requisite.

Abstract

Biological drainage relies on vegetation, rather than engineering mechanisms to remove excess soil water through evapo-transpiration. It is often considered attractive because it requires only an initial investment in site development (planting of a “bio-drainage crop”) and (potentially) returns a benefit when the bio-crop is harvested for fodder, wood or fibre. Presently about one-third of the world’s irrigated area faces the threat of waterlogging. Considering long-term viability of bio-drainage, the systems would be subjected to the same scrutiny as other plant-based biological systems with regards to nutrient and salt-balance and soil considerations. Moreover, large-scale adoption of bio-drainage crops could include considerable tracts of land and socio-economic considerations.

Abstract

‘Women Empowerment’ has been now an important phrase of discussion for the social scientists. The concept of ‘Empowerment’ was firstly highlighted by the Political Scientists. Undoubtedly, effective utilization of human potentials and realization of knowledge about him/herself are believed to be the most critical capabilities of individuals. Probably this is the root of ‘Empowerment’. The term ‘Women Empowerment’ symbolizes women’s realization about their potentials. On the other hand, SHG approach intends to highlight towards unfolding the potentials of women through group approach, enabling them to help themselves by their own capacity. In spite of this, the condition of women SHGs is in doldrums. This might be quite difficult to generalize the whole scenario. The study is a modest endeavor to revisit women SHGs (developed by NGOs) of East Singhbhum districts of Jharkhand. Of the various factors attributed to tribal socio-economic lives of family based farmers, gender role is considered as the important factor. Tribal women in almost all walks of life are sharing responsibilities in domestic as well as economic sector.The study is based on Ex- post facto research design. The methods of data collection were quantitative and qualitative in nature and were aimed to seek answers to certain research questions. Participatory Rural Appraisal and FGD are being the dominant methods.

Abstract
 
The word “sustain” is derived from the Latin verb ‘sustinere’(to keep in existence or maintain) and implies long-term support or permanence. The accepted definition of sustainable agriculture has proved to be elusive, given the extraordinary diversity and complexity of agricultural land use, and the perspective taken including producers, consumers, policy makers and workforces. Sustainable agriculture is defined as ‘the ability of farmland to produce food grain and other agricultural products to satisfy human needs indefinitely as well as having sustainable impacts on the broader environment and maintained equilibrium in productivity level’. That in other words, requires agriculture to avoid severe or irreversible damage to the endogenous or external ecosystem services upon which it depends, notably soil fertility, irrigation water, genetic variability and pollinating agencies and have acceptable impacts on the broader environment under the environmental stewardship.

Abstract 

The district Murshidabad lies within the Younger Deltaic Plain and the Bhagirathi Recent Surface has been considered as the severe flood affected district of West Bengal state, India. Murshidabad is highlighted one in terms of occurrence of flood due to its typical geographic location and diverse geomorphological characteristics. The district witnessed frequent floods because of high intensity of rain fall in the basin area of Bhairavi-Jalangi-sealmari rivers. Inflow of flood water from Ganga-Padma in high spate condition further aggravates the congestion of drainage. Lack of proper drainage is also responsible for flood in the upstream side in the western part as well as beyond the Berhampur town. Flood management may be undertaken through physical and socio-economic measures, which includes the scientific control of reservoirs; construction of new barrages, improvement of river channels, removal of human encroachment along river side, timely flood warning and forecasting, preparedness of essential services along with proper flood plain planning are indispensable. Addressing of socio-economic problems may help to combat the flood situation in an effective way.

Abstract

More than 73% of its total population lives in rural areas and depends primarily on agriculture for livelihood. The performance of agriculture determines food and nutrition security which is important for reducing poverty and achieving sustainable growth. Production and productivity has increased manifold and yields of major crops like paddy, pulses, oilseeds and vegetables have more than trebled in the last four decades. The impressive long term growth in agriculture helped in taking the state out of famines and serious food shortages into one of the food surplus states and ensuring food, nutrition and livelihood security. The state is characterized by wide diversity and considerable spatio-temporal variations in growth and productivity. In fact, agriculture isincreasing with public investment in infrastructure including irrigation, establishing appropriate farming systems, developing suitable and affordable technologies and crop varieties, augmenting credit delivery and designing region and crop-specific plans. In this backdrop, a study was conducted to document the indigenous and organic farming technologies in selected communities of the state in tribal dominant Gajapati district of Odisha intended to help the farmers to be aware of their own innovative technologies for weakening balances on the environment due to intensive use of fertilizers and agrochemicals. 

Abstract
 
The climate is one of the main determinants of agricultural production. At present, climate change has been appeared as a tremendous global crisis and modern agriculture is responsible for anthropogenic emissions of Greenhouse Gases (GHGs) which are important causing factors.  The ill effects of global warming and climate change have been reflected adversely in agriculture causing threat to food productivity and security. Thus there is an urgent need for adoption of ecologically sound and economically viable farming practices to mitigate the adverse effects of global warming as well as climate change. Organic agriculture is one of the most prominent and widely practiced ecologically sound farming systems and it might be a suitable option as it is based on the principles of ‘care, health, ecology and fairness’ with the capability to reduce emission of GHGs. Moreover, organic agriculture provides several gains like contribution to the conservation of biological diversity and animal welfare, supply of local products of natural origin, reduction of fossils fuel energy and protection of the environment from pollution with chemicals, carbon sequestration and restoration of soil fertility, assurance to agricultural sustainability, and thus ensuring food security to ever growing population of the world.

Abstract

Never ending additional need of farmers have forced them to grow more cash crop along with crops used for the staple food. The prime crops as per the food habit, social need has to be produced in the respective locality. The micro planning for agricultural and food production has to be planned for different blocks of a district to meet above needs. The production planning has to be simulated first and programmed for trial production. After successful trail, the same has to be replicated in larger area. Mathematical model development approach is one of the solutions to predict the need of the people and plan production depending on the availability of the input materials like natural resources and other inputs. In addition to this food and nutrient security for the people living in those different areas are very important in present context. Global population is growing fast with 1.2% per annum. Feeding these people increases the responsibility of farmers for growing more crops without considering the soil health. Improper crop sequencing has resulted in imbalance in soil nutrient which results in unsustainable production of forth coming crops. 

Abstract

Soil acidity poses a great problem for crop production due to very poor fertility status and nutrient imbalances in eastern and north eastern region and hence, it needs a special attention to address such acidity problems in relation to crop production. The integrated nutrient management system for the maintenance of soil fertility, sustainable agricultural productivity and improving profitability through the judicious and efficient use of mineral fertilizers especially secondary and micronutrients, organic matters, green manures, bio-fertilizers in acid soils. Rainwater harvesting, efficient storage of excess rainwater and subsequent uses as supplemental irrigation especially in the areas of rainfed situations as well as selection of crops and cropping systems in different acid soils region need to be developed. The management of secondary and micronutrients in acid soils can be made either by the addition of cost-effective lime or liming materials to counteract the abnormalities of soils by raising pH as the first step and subsequently by modifying agricultural practices and applying balanced fertilizers including limiting nutrients viz. S, B, Mo and Zn at optimal levels based on soil test values for maximum crop production.

Abstract

Arsenic, although a non-metal, is very often referred to as a heavy metal. Its provenance and contents in recently formed or least weathered soils depend on the type of rocks and intensity of geochemical processes. The variation is exemplified in shale, where As content varies from 1 to 900 mg kg-1. In highly weathered soils, where pedochemical processes exceed geochemical processes, the content is generally below the levels that are toxic to life forms. In the Bengal basin, As content is low in soils, but high in the ground water (beneath the vadose zone). This suggests that As has been sufficiently leached from soils. The solubility of most of the As-bearing soil minerals is high, and it occurs as anions (AsO33-, or AsO43-) in soil solution. The soils of the Bengal basin are alkaline in reaction, mostly fine textured with almost even distribution of particle size fractions, and moderately drained. Minerals like micas and feldspars dominate their coarse fractions, whereas illite (40-47%) and smectite (24-30%) are dominant in clay fractions. Both inorganic and organic colloids are negatively charged that cannot retain anions. In many soils in the world, leaching of As is well documented. 

Abstract

In a developing country like India with exploding population pressure and shrinking availability of resources per capita, agricultural intensification maintain soil health is the only way to solve hunger and poverty. Soil is a fundamental resource base for agricultural production systems. Besides being primary medium for crop growth, soil functions to sustain crop productivity, maintain environmental quality and provide for plant, animal and human health. Soil organic matter (SOM) content is frequently identified as a primary attributes of soil quality assessment. It is evident that SOM influences various soil physical,chemical and biological properties. Besides, SOM serves as a slow release reserviour for macro-, secondary and micronutrients to plants.

Abstract
 
Adoption of agricultural practices is cost effective bioremediation techniques to mitigate arsenic problems and can contribute substantially to the cause of removal of arsenic and other heavy metal contamination of soils and water thereby quality enrichment in marketable agricultural produce leading to increased crop productivity in the area of intensive cropping under irrigated eco system. Though the farmers are already practicing some traditional techniques to mitigate the arsenic problems in soils and water, like cultivation of crops which are less affected to arsenic and heavy metals pollution, growing hyper accumulating crops and so many practices wherein the modern methods are not prevalently used by the farmers due to the lack of scientific validity of these techniques, particularly in the context of prevailing socio-economic conditions. Moreover, acceptance of these improved practices by the small farmers of this region is an evolutionary process and should be intensively proved. Hence, extensive studies need for bio or phyto-remediation of heavy metals including arsenic contamination for quality marketable agricultural produce, which ultimately can realize better crop productivity.

Abstract

The bio-drainage system used to control the water logging hazards and restore the ground water table depth at a level favourable for other crops to grow. The water utilization efficiency per unit area of land improved through bio-drainage and associated cropping activities. The huge quantity of shallow and good quality groundwater that remains perpetually unutilized by the prevalent lowland cultivation system was effectively used by the biological drainage system. Thus the bio-drainage is expected to alleviate the land degradation problem due to high depth of water stagnant, to restore the crop cultivation programme on a sustainable way, to improve the water management practices, to improve the economic conditions of the lowland farmers and finally, to conserve the ecological values of this fragile agro-ecosystem.The objectives of efficient bio-drainage system are to evaluate ET and depended on growth characteristics of different trees and vegetation species having bio-drainage potential in the waterlogged land thereby to study the water table behaviour in the land under plantation and in the surrounding region and use the result in developing suitable plantation geometry to ensure desired water table draw-down, to assess interaction between bio-drainage plantation and co-existing crops and/or companion crops, to assess the value of the tree species through fodder, fuel wood and timber use, and to development of a new technology for land reclamation and evaluating its impact on soil, water and plant bodies in the basin.

Abstract

Water is the elixir of life, livelihood, food security and indispensable to all economic activities. It is going to be a constraint in agriculture in near future due to the competitive demands from other sectors. Agriculture is the largest user of limited water resources. The Gangetic Bengal basin once described as the areas of excess water now suffers from acute dearth of water during the drier months. Water management holds the key for maximum agricultural production through optimizing the utilization of available water resources in a systematic manner. Drip-irrigation provides unique agronomic, water and energy conservation benefits that address many of the challenges facing irrigated agriculture. In intensive agriculture, both fertilizer and irrigation management have contributed immensely in increasing the yield and quality of crops. The method of fertilizer and irrigation application affects the efficiency. Drip-fertigation is the most efficient and less expensive agronomically sound method of fertilizer application along with irrigation water. It has the potential to ensure that the right combination of water and nutrient is available at the active root zone, in synchrony of the plants’ total and temporal requirements and stabilizes the yield and quality of produce. Fertigation saves fertilizer nutrients as it permits applying fertilizer in small quantities at a time matching with the plants’ nutrients’ need. To address these problems, AICRP on Irrigation Water Management, 

Abstract

The per capita availability of fresh water in the World is continuously decreasing. It is reported that in the World about 69 percent of total water resources developed are used for irrigation, 23 percent for industries and the balance is used by the domestic sector. About 60 percent to 70 percent of water used in domestic sector is returned as waste water. Substantial quantities of water used by industries are also returned. To meet the increased food requirements of the global population, there is constant pressure for increase in food production. Since, agricultural productivity depends on availability of water; there is increased demand of water for irrigated agriculture. On the other hand, due to increased demand of water for other sectors, quantum available for irrigation sector is getting reduced. So, for meeting the increased irrigation demand, it is necessary to economise the use of water for irrigation by adopting improved technologies and improving the water use efficiencies. 

Abstract

Nadia district covers 3927 sq km of West Bengal State and forms lower part of Indo-Gangetic alluvium of Quaternary age. The district is entirely affected by arsenic contamination in ground water. Population explosion, rapid agricultural growth and inadequate surface water resources has put tremendous thrust on ground water development. 80% of the population is dependent on agriculture. Ground water plays a key role to yield substantial agricultural growth. Irrigational potential of the district is 3356 sq km, of which major contribution belongs to ground water only, i.e., 3100 sq km. Summer season (boro) (lean period crop) paddy cultivation demands huge ground water. Shallow tube wells within 80 metre depth are major in numbers than deep (beyond 100 metre) tube wells. Dynamic ground water resource calculation indicates that net ground water available in the area is 198948 ham, of that for irrigation purposes ground water draft is 167617 ham. Net ground water available for future irrigation development is 34996 ham. Out of 17 blocks of the district, six blocks have already been listed under semi-critical category. 

Abstract

Water Crisis or scarcity can be explained as when demand for fresh water goes high in comparison to the supply of fresh water. The condition is the cause when there is a high rate of aggregate demand from all water using sectors like food, agriculture etc. are compared with available supply under prevailing institutional and infrastructural conditions. It is evident from economic competition from water quantity and quality, disputes between users, irreversible depletion of ground water, and negative impacts on the environment. Water crisis is actually a relative and dynamic concept irrespective of any level of supply and demand. It is a social construct and its causes are directly related to human interference with the water cycle. This scarcity varies over time due to natural hydrological variability. But the stronger reasons could be more of functions of prevailing economic policy, planning and management approaches.