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Peanut is an important crop in the semi-arid regions of the world. Both, irrigation and well water can provide the water necessary for it. It is a nutritious seed nut crop and has manyfold uses. As such, research on this crop is imperative. This book reviews physiological aspects, keeping in mind the changing agroclimatic conditions. Growth, development and yield are described on the basis of cellular and morphological manifestations. Being a C3 plant, the photosynthesis and respiration in peanuts is critically viewed specially under varying environment conditions and genotypes. The study of nitrogen assimilation and biological nitrogen fixation have been presented in light of the prevalent environmental and gene effects. The role of plant growth regulators in peanuts is elaborated on, stating up-to-date mode of actions. Special emphasis has been given to mechanisms of abiotic stress effects. The chapters (13) are arranged on the basis of physiology, cellular structure, biochemistry, molecular and genomics concepts.
No crop can be grown without being adequately supplied with the requisite amount of water at the proper time. A thorough knowledge of the hydrological cycle, amount and distribution of rainfall, water resources and irrigation projects in India facilitates efficient utilization of water for crop production. Inadequate supply of water to crops in semi-arid and arid regions adversely affects agricultural production. Properties of water, the mode of its entry into the soil and its absorption by roots of crops are important for irrigation. This necessitates accurate determination of the soil moisture content, the plants and available water which is essential for growth and yield of crops. Its deficiency adversely affects their growth and yield. Irrigation must be extended to unirrigated areas in order to increase the production of food, fibre and fodder for which we must know the source of irrigation water, units and methods of measurement of water, methods of irrigating crop fields, factors affecting the choice of irrigation methods, the degree of the suitability of the available water for irrigating crops and the factors affecting the suitability of water for irrigation. As water is a relatively scarce commodity, we must know whether water of a little inferior quality can be utilized to irrigate crops. In addition, we must be familiar with the precautions which need to be taken in this regard. The accumulation of excess water in the soils of the crop fields affects the growth of crops adversely enough to reduce their yields. Choice of the method of land drainage varies with the variation in the topography of the land. It is also necessary to rectify the causes of waterlogging to bring the waterlogged land back under the plough to increase agricultural production. This necessitates drainage investigation and laying out of the proper drainage system. Water requirement of crops depends on the climate and the crop. More water is required to produce crops in the arid region than in the humid region. Crops like paddy and sugar cane require much larger amount of water than finger millet and pearl millet. The book extensively deals with all these aspects related to soil and crop production and suggests measures to enhance productivity through water conservation and proper management of water resources. It will be highly useful for the students, teachers and researchers working in this field. Besides, agriculturists and general readers will also find it useful and informative.
Systems approaches for agricultural development are needed to determine rational strategies for the role of agriculture in national development. Mathematical models and computer simulation provide objective tools for applying science to determine and evaluate options for resource management at field, farm and regional scales. However, these tools would not be fully utilizable without incorporating social and economic dimensions into their application. The second international symposium, Systems Approaches for Agricultural Development (SAAD), held in Los Baños, 6-8 December 1995, fostered this link between the biophysical sciences and the social sciences in the selection of keynote papers and oral presentations, a selection of which are included in these books. The contents further reflect how systems approaches have definitely moved beyond the research mode into the application mode. The large number and high quality of interdisciplinary research projects reported from different parts of the globe, to determine land use options that will meet multiple goals and yet sustain natural resource bases, is a key indicator of this `coming of age'. At the farm level, where trade-off decisions between processes and products (commodities) feature strongly, much progress is also evident in the development of systems-based tools for decision making. At the field level optimization of resource use and minimizing environmental effects has become of major concern for which systems approaches are indispensable. The books, of which Volume I deals with regional and farm studies level and Volume II with field level studies, will be of particular interest to all agricultural scientists and planners, as well as students interested in multidisciplinary and holistic approaches to agricultural development.
The book gives a vast knowledge about the progress made in Indian on different entomological aspects. the book will serve as a complete source book on research techniques and practices of pests management, advanced genetic and biotechnological researches, new pests management technologies on different crops, pesticidal contamination status in environment. The book has been written for teachers, students, researchers and extension workers engaged in pests management strategies
Vertebrate pests cause considerable damage to environment, agriculture and biodiversity apart from transmitting diseases. The problem is more pronounced in tropical Asia and Africa with non-human primates, elephants, several species of ungulates, rodents, frugivorous and grainivorous birds causing agricultural losses. In Europe and America the damage is due to carnivore predation on livestock, bird damage in cereal crops and rodent problem in urban and agricultural situations. Although there are several excellent books on rodent pest management both in India and at global level, there is a conspicuous lacuna of published books on vertebrate pest management. Even the few publications on the subject mostly deal with birds, rodents, bears, rabbits, foxes, etc because they are written by Americans or Britishers. Because their emphasis is on the problem prevalent in their countries and evaluation of management options available to them. In contrast the problem in tropics especially in India is unique. Rodents of course, are the most destructive. But what rodents do over twelve months of year is matched by a few nights of devastating crop raids by elephants or week long foraging by monkeys. Sporadic and localized damage is inflicted by several species of birds, bats, wild boar, blue bull, bears, hares, peacock etc. The damage is sometimes so high, it is impossible for a subsistence farmer to accept stoically the loss of his entire food source over a couple of days and nights. However, his options are limited in view of conservations and protection status enjoyed by some of these animals. The problem is compounded by religious sentiments associated with a few of them. This book is an attempt to find an acceptable solution to the problem of crop losses of these less studied but economically important groups of vertebrate pests. Sincere efforts have gone into formulation of recommendations keeping in mind the biological needs of vertebrate pests, their conservation status and suffering of the poor farmer. Many a time the sympathies deservedly go to the speechless marauders of crops as it is man who has shrunk, degraded and destroyed their habitat, deprived them of their natural source of food. There are no choices for vertebrate pests but raid the crops in their range but we, humans have several to survive. The book is an attempt to understand this dilemma.