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  • af Rakesh Sharma & Peshin Rajinder
    3.308,95 kr.

    The Book " Integrated Pest Management of Vegetable Crops" deals with a global overview IPM initiatives and review of different IPM programmes. The widespread use of IPM practices has not been adopted besides there has been a problem of diffusion of IPM practices from research sub-system to farmers. There is no unanimity with the methodological aspects of impact evaluation and dissemination of IPM programmes/practices., The book focuses on integrated pest management of vegetables, pesticide use, robust methodological aspects of impact evaluation, impact evaluation of vegetable IPM programmes and factors impacting the adoption of IPM practices. This book will serve the agencies associated with formulation and implementation of IPM programmes and will serve the professionals, investigators, and academia. At post-graduate level, the students will find the book as a useful guide for planning and conducting future research on IPM diffusion and impact analysis.

  • af Om Prakash & Dilip R. Ranade
    3.178,95 kr.

    The book is in simple languages with ability to provide extensive knowledge about cultivation, purification, handling and bio-banking of different classes of anaerobes including the obligate, facultative, aero-tolerant and micro-aerophillic is very much essential. The aim of preparation of current book is to provide the state-of-the-art knowledge about anaerobes and anaerobic process to undergraduate, graduate and PhD students. Information like cultivation, handling, preservation and various important process related to anaerobes like biomethanation, anaerobic methanotrophy, solid waste management, anaerobic biohydrogen and biobutanol production, anaerobic nitrogen treatment, anaerobic solid waste management. Complete section like anaerobic probiotic, anaerobes and human gut microbiology and anaerobes and human infection. Chapters on role of anaerobes in animal rumen and food digestion. Will serve its aim to satisfy the hunger of knowledge about anaerobes and anaerobic process for the UG, PG and PhD students of Microbiology, Biotechnology, Environmental Science and biochemistry background.

  • af P Surudhi
    1.353,95 kr.

    This textbook "Communication Technologies in Agriculture" will be a comprehensive book with 24 chapters which covers the old wisdom and also the new horizons in innovations and trends in Agricultural Extension for all those who are associated with Agricultural Extension as a student, scholar, researcher and practitioner.This book would serve to the information needs of all the stake holders in the change process. More fittingly, the Under Graduate students of Agriculture and Horticulture and Post Graduate students of Agricultural Extension, Mass Communication and Rural Development who would use it for enriching their theoretical requirements.

  • - Origins, Developments and Applications
    af Kevin Desmond
    1.998,95 kr.

    As far back as 1873, experiments were carried out to see whether the electric trolley system applied to omnibuses could be adapted to ploughing and tilling fields. In 1913, 1,600 "trolley/cable ploughs were in use across Germany. The arrival of the gasoline tractor relegated the use of electricity to electroculture, short haul farm machinery and lawn mowers. But it is only with the availability of the lithium-ion battery during the last decade, that electrically powered drones and more recently tractors and earth movers are being seen as the way ahead. In this, the sixth in his seminal electric transport history series, Kevin Desmond portrays the lives of the innovative engineers who perfected these e-tractors and agricultural drones

  • - Utilization and Conservation
    af Gopal Shukla & Bidhan Roy Chakravarty
    3.688,95 kr.

    Medicinal and aromatic plants (MAPs) are invaluable natural resources of use to human race, without which the survival of human/ animal race is incredible. There is an enormous diversity of plants which are put into medicinal, beauty care and culinary purposes. Cultivation of commercially important medicinal plants is in high demand as the global community is growing towards a green and herbal oriented approach. India as a country has thousands of years old traditional medicinal systems which rely solely on medicinal plants. There is a gradual loss of medicinal plants with the increasing demand of plant derived drugs. Majority of medicinal plants are still collected from the wild. This doesn't meet the demand and thereby pave ways to adulterants. The over extraction and ignorant activities cause biodiversity loss. Farm production of MAPs in these days is extremely vulnerable to underlying climate risk. Sustainable management of these resources requires urgent attention for environmental stability and improvement of livelihood. New income generating opportunities are opening up for rural populations and in particular for small-scale farmers as well as marginal farmers through MAPs cultivation. New generation are not well aware of the various uses of many plants to which it was put before. Thus there is an urgent need to spread the knowledge and conserve the wild populations of medicinal plant diversity in various forest areas of India.Considering the importance of the MAPs, an attempt was taken in this edited book to understand and highlight the role of MAPs in livelihood improvement and income generation through cultivation, conservation and utilisation. Most of the chapters in this book dealt with individual medicinal plants in detail. Two chapters have also been included on pests and diseases management of MAPs. Nowadays, IPR issues are more important. One chapter has been included on IPR issues on medicinal plants. A chapter also devoted on value addition of the medicinal plant products.

  • - Approaches and Achievements
    af Anil Kumar Shukla Tiwari
    2.058,95 kr.

    The pressure of an ever-increasing population and periodic famine due to unexpected flood and drought has forced and awakened the horticultural scientist, to evolve new plant types for diversified use. Besides, some limitations in the improvement of fruit crop such as long juvenile phase, high heterozygosity, limited information on inheritance pattern, excessive fruit drop, parthenocarpy and lesser number of seeds per fruit, hybridization, selection, mutation and other tools of fruit breeding have resulted in the development of a number of varieties in mango, grape, papaya, banana and guava for various purposes.The present 2nd fully revised and enlarged edition of the much awaited book "Fruit Breeding Approaches and Achievements" is ventured with the objective to provide latest possible information on basic approaches in fruit breeding, breeding for biotic stresses resistance, use of plant growth regulators in fruit improvement, improvement of important fruit crops such as mango, banana, papaya, grape, guava, citrus, ber, aonla, pomegranate, date palm, litchi, coconut, cashewnut, pineapple, temperate and underutilized fruits in a broad spectrum.

  • af Suresh Chandra Kumari
    1.728,95 kr.

    In any agricultural country, various types of agricultural commodities are produced in large quantities and to handle such quantities during harvest, post-harvest, processing and transportation, various types of equipment are required. To design particular equipment or determining the behaviour of the product for its handling, physical properties such as size, shape, surface area, volume, density, porosity are very important. Various types of cleaning, grading and separation equipment are designed on the basis of physical properties of seeds such as size, shape, specific gravity etc. The book will provide a fundamental understanding of engineering properties of agricultural produce and the knowledge of engineering properties are combined with engineering knowledge. Each chapter in the book will be helpful for the students to understand the relationship between engineering properties of raw, semi-finished and processed food to obtain products with desired shelf-life and quality. This book discusses basic definitions, principles of engineering properties and their measurement methods with research findings. It will be helpful to the students for their self-study and to gain information how to analyze experimental data to generate practical information. It will also be helpful for students who deal with engineering properties in their research. Methods to measure these properties are also explained in details.

  • af Renu Agarwal
    1.623,95 kr.

    This book will enrich the readers on the major improvement been made in food safety management in the last twenty years, it will explain food hygiene, the journey of research been taken in food safety till date and the challenges that we are going to face in future to ensure food safety and its wholesomeness. It also includes the role and responsibilities of the various sectors of society, namely governments, food industry, consumers and academia and also deals with HACCP, GMP practices and Food laws. This book is unique as it has included the causes of food allergies, adulteration, genetically modified seeds and crops, GM fruits and vegetables and the effect on human body. It has also discussed the difference between traditional and organic farming. The book will be helpful to know the foods to be used in space shuttle and also discussed the role of FDA and WHO in food safety which is a very important aspect in food safety, the role of bacteriocins obtained from bacteria of GRAS status; as natural preservative is very important. The author has discussed this aspect in detail. This book includes the role of packaging in food is another very important aspect in keeping the shelf storage of food.

  • af Jag Paul Sharma
    3.763,95 kr.

    First chapter elaborates the bottlenecks and gaps in the form of challenges that one needs to know while thinking of futuristic plans. Chapter 2nd enumerates technologies that changed the scenario of Indian agriculture and brought green revolution and sustainability in food production. Third chapter is devoted to new innovations and technologies that deserve priority if transformation in agriculture is desired. Small holdings are the characteristic feature of Indian agriculture and how contract farming is relevant and important is described in chapter 4. Due to increased preferences for vets and pets in our daily life zoonotic diseases have gained socio-economic significance, chapter 5 highlights it. Chapter 6 elaborates the role and relevance of ICTs (information and communication technologies) in agricultural transformation. Climate smart agriculture is essential part of agro-transformation and is described in chapter 7. Parasites in dairy cattle can reduce productivity upto 30% and chapter 8 focuses on their strategic management. Chapter 9 focuses on marketing interventions while chapter 10 discusses relevance of seed priming in climate resilience. Chapters 11 and 12 provide judicious coverage on horticultural technologies and their strategic implementation to boost productivity. Importance of biochar and organic agriculture in context of sustainable transformation is highlighted in chapter 13 and 14 respectively. Chapter 15 signifies the role of dairy farming. Weather forecasting and agro-advisory have become indispensable component of modern agriculture find place in chapter 16. Chapter 17 reveals avenue in agriculture through integrated farming system while chapter 18 discusses importance of remote sensing in integrated transformation of agriculture. Role of KVKs and biotechnological approaches is appropriately dealt in chapter 19 and 20 respectively. Chapter 21 places due emphasis on effect of climate change on parasitic diseases of animal and human. Scope of high cropping intensity in agricultural transformation is dealt in chapter 22. Last chapter 23 but not the least, is on organic agriculture as an entrepreneurship for women empowerment and socio-economic transformation which discusses the compatibility and suitability of organic agriculture to women entrepreneurs.

  • - Volume 6: Advance Techniques
    af Sachin Tyagi
    1.828,95 kr.

    Horticulture plays an important part in today's agriculture and there are new avenues that are being achieved by horticulture.

  • af Sachin Tyagi
    828,95 - 2.073,95 kr.

  • - An Illustrated Handbook on Amputations, Prosthetic Fittings & Rehabilitation
    af S. & Nayak
    1.281,95 kr.

  • - Volume 03: Improved Production Techniques
    af Sachin Tyagi
    2.878,95 kr.

    Horticulture plays an important part in today's agriculture and there are new avenues that are being achieved by horticulture. The subject has transformed from only being about vegetables, fruits, flowers and postharvest technology and has moved towards disease, breeding, pathology, physiology, greenhouse technologies and other areas which were never heard for.The book series: Hi-Tech Horticulture has been worked out keeping the above mentioned issues in mind with contribution by eminent professors and scientists.

  • - An Emerging Avenue of Seed Science and Applied Biotechnology
    af Bidhan Roy
    2.878,95 kr.

    Nowadays, artificial seed technology is one of the most important tools to breeders and scientists of plant tissue culture. It has offered powerful advantages for large scale mass propagation of elite plant species and conservation of plants. The artificial seed technology is a rousing and fast growing area of research in plant tissue culture. The information in the areas of synthetic seed preparation technology, its implications, achievements and limitations are lying unorganized in different articles of journals and edited books. This information was presented in this monograph in organized way with up-to-date citations, which will provide comprehensive literatures of recent advances. To be an expert in artificial seeds, one should have enough practical hand in plant tissue culture. The main aim of artificial seeds is to obtain true-to-type plants; consequently the different methods of testing clonal.

  • af Alok Kumar Patra
    1.058,95 kr.

    The origin of agroforestry practices, i.e. growing trees and shrubs with food and fruit crops and grasses is traditional and very old; but the science of agroforestry is new. Years of experience and experiments have shown that agroforestry as a land-use system is capable of yielding both food and wood and at the same time helps in conserving and rehabilitating the ecosystems. It has the capability to increase the overall productivity of land, maintain the nutrient balance in the soil and above all protect the nature. In the recent years, agroforestry has been recommended as a core subject in the curriculum of B. Sc. (Forestry) and B. Sc. (Agriculture) courses of the state agricultural universities. The book has been divided into ten chapters covering very comprehensive information on all aspects of agroforestry including history, concepts, systems classification, tree-crop interactions, planning and management, diagnosis and design, policy and projects, and propagation and management practices of multipurpose trees. 2020, 192pages, figures, tables, index, 25cmDr. Alok Kumar Patra has about 25 years of experience in research and teaching at UG and PG level on agroforestry and agrometeorology. Presently he is working as Professor (Agronomy) in the All India Coordinated Research Project on Integrated Farming Systems, Odisha University of Agriculture & Technology, Bhubaneswar- 751003, Odisha.

  • af G. Vijayalakshmy Sangeetha
    2.143,95 kr.

    The scope of the book makes it an useful reference for different courses in Agricultural Science and Horticultural Science, Agricultural Engineering, Environmental science. The coverage in 17 chapters brings out different aspects of Irrigation including different systems/ methods of irrigations in the world, rainfall, evaporation, water wealth, measurement of soil water and progressive development of irrigation in India. The book focuses on the importance of water where, water becomes a limited resource due to the multi-various demands from different sectors like agriculture, livestock, industries, power generation, increased urban and rural domestic use.

  • af Raman Rao
    1.653,95 kr.

    Nutrition remained largely an art until the scientists entered the field and chemists described feeds in terms of chemical entities. The physiologists, endocrinologists and bacteriologists joined the team and this paved the way for demonstrating that the feeds are heterogeneous combination of nutrients. It was shown that most single feed is unbalanced in terms of an animal's requirements. The field of nutrition has moved forward at an accelerated pace, year by year, as the new knowledge accumulated. In preparing this manuscript, the general framework and character of the book established by seniors, have been preserved. The text presents the principles of nutrition and their applications to feeding practice. It not only presents facts but shows how many of these have been obtained, illustrating experimental methods which will continue to develop new facts in the future. Like other rapidly advancing fields, new discoveries in the science of nutrition, which add to our knowledge, inevitably cause some modification in ideas previously held. The literature citations have been made on the basis of their usefulness to those students who are the principal users of the text. Such a compilation has resulted in an unbalanced representation of nutrition research on a worldwide basis.

  • - Plants for Fun and Game: Plants for Fun and Game
    af Sidhanta Sekhar Bisoi & Mahendra K. Satapath
    2.443,95 kr.

    However with shrinkage of open spaces and play grounds, present day children are often seen putting their leisure hours with electronic gadgets such as computers, mobile phones and video games and consequently the indigenous knowledge associated with playing in nature is being lost and their social attitude is disturbed. From a wide survey of rural and tribal pockets, the authors have gathered the vanishing indigenous knowledge and have described 90 plant species with their fruits, flowers, leaves, seeds, stems etc. which are used for fun and games besides as learning materials supplemented with pictures, diagrams and photographs for the benefit of the readers, especially the plant lovers and Environmentalists.

  • af A Zaman
    648,95 kr.

    The book is organized into sixteen chapters. A brief description of each of the chapters follows: Chapter 1 identifies the concept of importance and definition as basic requirement to know the challenges in the management of information security in the new millennium; Chapter 2 identifies the types of farming system and factors affecting farming system; Chapter 3 envisages sustainable agriculture, its problems and its impact in cropping system; Chapter 4 takes historical background of agriculture, its changing scenario and its resilience over the years. Chapter 5 delineated sustainable agriculture, its importance and its impact in cropping system; Chapter 6 describes the agro-climatic and agro-ecological zones that need for model of integrated farming system to be developed as a policy perspective to ensure the crop cultivation the highest level of protection against all sorts of threats. Chapter 7 takes history of agriculture, its changing scenario and its resilience over the years. Chapter 8 reviews the rejuvenation, modernization and mechanization of agriculture, its present bottlenecks on ethical elements of security such that trust could be promoted to outburst the explosive population; Chapter 9 reviews the information on soil resource in the context of problematic security threat; Chapter 10 reviews issues on external input based sustainable agriculture surrounding low land utilization as existing resource mobilization and utilization. Chapter 11 presents the importance of organic farming well as organic agriculture to get the best results in sustainable agriculture; Chapter 12 addresses the issue of water management and planning, with particular reference to irrigation management and judicious water application in crop cultivation. Chapter 13 presents gaps and problems in each of the current approaches in rainfed agriculture, rainwater harvesting as well as rainwater management in growing crops in best possible manner; Chapter 14 discusses management of lowland areas towards sustainable agriculture; Chapter 15 refers the land degradation and land treatments in the way of effective utilization of land resources through tillage, conservational tillage and other suitable measures; and Chapter 16 concludes the present principle of remedies, the economic equity, social security along the future task and presents pragmatic, formal, informal and technical principles necessary for managing food security in the new millennium.

  • af Mahadevappa Patil
    2.428,95 kr.

    The book has covered all mad made and natural disasters and their effect on livestock and how they can be managed better for longer survival and help to the humans. Topics on how animals can sense a disaster in advance and what are the common indications given by them and how humans can benefit from it.Book elucidates the management of feeding, feed resources, production and health so as to make the livestock production economical. It is hoped that the compilation will prove useful for the researchers, planners and policy makers to understand the causes for the loss of productivity and health of livestock in drier regions and help in devising management plans towards sustenance and improvement of production.

  • af A.P. Upadhyay Pandey
    1.433,95 kr.

    The book provides information on the following areas to scientists, resource managers and researchers working with big data to advance more sustainable fisheries practices. Modeling in the areas of Feed Conversion Ratio (FCR), Specific Feeding Ratio (SFR), Key Performance Indicators (KPI) that are needed for efficient management of resources for sustainable production from fisheries sector. Neural Network forecasts that exceeded other traditional forecasting methods such as linear or logistic regression systems. Application of Big Data Analytics in aquaculture that facilitated to bring the techniques of aquaculture to a new level of in depth understanding and unlocking the economic potential of improved management decisions particularly can spot business trends, prevent disease, combat crime, and even revolutionize the health of fisheries. Application of ANN to forecast water quality and temperature that benefits aquaculture process control. Sensor Technology that offers real-time environmental monitoring system for aquaculture in a wide range of areas and visual signal processing system to continuously control the feeding process of fish in aquaculture tanks. Artificial Intelligence Systems that in turn helps in increased process efficiency; reduced energy and water losses; reduced labor costs; reduced stress and disease; better understanding of the process and efficient accounting are also. Data Mining for better control on the food loss and food quality in the aqua farming industry. Analysis of Value Chain of Processed Fish Products Partial Budget Analysis for better understanding of the farm's financial status and more efficient use of the resources available particularly for aquaculture practices. Tips for right type of statistical test to equip the social science researchers capable of performing of Statistical tests for various rating scales mostly used for social sciences research. A holistic, global-scale focus on challenges of IUU and technology initiatives to face the challenge This unique book explores a wide range of analytical issues centered on the aquaculture process management. It is expected that this book will be most useful who aims in achieving FAO's Sustainable Development Goal 14, which calls on the international community to effectively regulate fish harvesting end overfishing, illegal fishing, and destructive fishing practices, and to implement science-based management.

  • af Anil Kumar Chand
    2.288,95 kr.

    Commercial entomology is a specialized field of attraction under entomology. In spite of the fact that insect and their products are known since ages, much literature is not available on commercial entomology. Authors of the chapters of the book have profound knowledge of different aspects of biology and management of insects especially in their field of contribution. So, their inputs are valuable for the development of commercial entomology in India. Importance has been given to Apis spp., silk worm, lack insect etc. while planning the chapters.The chapters of the book start from the honey bees and their management by Dr. Suday Prasad. Production technology for bee products and pests of honeybees and bee poisoning has been explained by Dr. Hari Chand and Mr. Beer Bahadur Singh in the 2nd and 3rd chapter, respectively. These chapters describe different valuable bee hive products, processing, uses and their composition for promotion of beekeeping development. The chapters on sericulture, lac culture, biological control, insect pests of medical importance, insect pests of cattle and poultry etc. have also been included in this book.

  • - Basics and Practicals: Basics and Practicals
    af Nintu Mandal Kumar
    958,95 kr.

    History of Nanotechnology, Basic Concepts, Definitions, Type of nanomaterials and its peculiarities have been described. Synthesis of nanomaterial's through physical, chemical and biological modes have been covered. Characterization of nanomaterial's through microscopic, spectroscopic and other techniques have been elucidated lucid language. This book will be helpful for UG and PG students of Agricultural Sciences including Horticultural, Veterinary, Animal and Fisheries disciplines.

  • af Manjanagouda Sannagoudar, Gurunath Reddy & B.S.Lalitha
    498,95 - 1.458,95 kr.

  • - Processing, Quality Assessment Packaging and Storage Techniques: Processing, Quality Assessment Packaging and Storage Techniques
    af Lakshmi Jagarlamudi
    2.293,95 kr.

    The book is a very comprehensive and much practical-oriented for day to day reference and to complete course-work by UG and PG students in discipline of Food Science and Technology. Different topics are treated in such a way as to provide a comprehensive knowledge of the theoretical as well as the applied aspects involved in processing of bakery and confectionery products to gain confidence in any dedicated reader to go for a startup as well in the field. It also covers information on ingredients to bakery and confectionery products, formulae and processes for bakers, equipment for bakers and confectionery units along with quality assessment and standards. Equally well, it helps those personnel connected with industries, who supply ingredients, equipment and packaging materials for bakery and confectionery units. The book is also useful for all the students appearing in any competitive/entrance examinations' in the disciplines of Food Science, Food Science & Nutrition and Food Technology.

  • - Causes, Impacts and Interventations: Causes, Impacts and Interventations
    af GSLHV Prasada Rao Rao
    1.923,95 kr.

    This book deals with climate change impacts and interventions in Agriculture across various regions of the Country based on the research findings emanated from ICAR institutes and State Agricultural Universities as Global warming and climate change is a threat to food security. Impacts of weather extremes viz., droughts, floods, heat wave and cold waves pose immediate threat to Agriculture because of their frequent occurrence due to global warming and climate change rather than the climate change threat directly to crops. More than 60 authors are involved with 29 Chapters to focus on mitigation and adaptation strategies in Agriculture against ill effects of climate change. Research investigations indicate that crop yields are likely to decline with increase in atmospheric CO2 and temperature in ensuing decades and crop losses can be minimized through technologies generated in crop management, crop improvement and crop protection practices. Farmers concern to minimize crop losses against weather extremes rather than climate change as the impacts of climate change (increase in atmospheric CO2 and temperature) on crops at the field level is not clear if water is not a constraint. The publication includes vulnerability assessment, adaptation strategies, crop choices/combinations in different climate scenarios and preparedness to face the exigencies of climate change and emphasis is given on interventions. Of course, there is need to intensify research to generate technologies/location specific farm strategies which can withstand the impact of climate change as a long term strategy and farmers are the best to cope up with suitable strategies against global warming and climate change/climate variability to sustain rural livelihoods is very complex and complicated at the farm level.

  • af Ankit Goyal, Manvesh Kumar Sihag & Karuna Meghwal
    1.438,95 kr.

  • af Basavaraj R
    1.163,95 kr.

    This book is prepared by keeping the ARS-NET syllabus of Farm Power and Machinery discipline in mind and it contains excellent collection of important points on farm machinery, farm power, ergonomics, theory of machines, energy in agriculture, instrumentation and workshop technology to meet requirements of students. The book serve as a useful resource to the agricultural engineering and farm machinery and power engineering students appearing for various competitive exams such as ICAR JRF/SRF, NET,ARS and GATE etc. The book contains a section on key notes related to important terms on farm machinery and power engineering. It is useful for better understanding of this subject.

  • - A Handbook of Dairy Entrepreneurs
    af Pranav Kumar Thakur
    1.328,95 kr.

    The publication provides fundamental information about dairy farming. The book covers the basic knowledge about how to start an entrepreneurial dairy farming covering almost all the basic aspects related to the field. The information provided is scientific and cosmopolitan and will be useful for small scale dairy farming. This book covers all the elements of dairy production with the goal of helping the dairy owners to keep their animals as healthy as possible. It covers areas including breeds and breeding management, housing and feeding management, basics of dairy animal diseases, disease prevention and control measures etc. This book will serve as a complete encyclopaedia of dairy husbandry practices and will help to guide practicing dairy farmers as well as starter (youth entrepreneur) in starting the dairy entrepreneurial venture from the scratch. This book provides the first hand knowledge to the entrepreneurs to start the dairy farming by using the resources present locally. The topics in the book are so designed that even by looking at the pictorial representations one can get the idea of how to start the dairy farming. The book also popularizes the use of non- conventional items present at rural households and their significant use in dairy animal rearing.

  • - Volume 03: Horticulture Science Series: 2nd Fully Revised Edition: Horticulture Science Series: 2nd Fully Revised Edition
    af T. Radha Kumar
    3.698,95 kr.

    This book is a compilation of available knowledge on all aspects of 88 fruits crops covering tropical, sub-tropical, arid and semi-arid major, minor and Under and Un-Utilized Fruits of Tropics and Sub-tropics. NEW TO THE EDITION Details on different aspects of fruit crops including origin, distribution, botany, varieties, crop improvement, propagation, climatic and soil requirement, cultivation methods, flowering, harvesting, post harvest management and crop protection of individual crops coming under tropical, sub-tropical, arid and semi-arid groups Revised and updated data More new information on Under and Un-Utilized Fruits of Tropics and Sub-tropics Updated references

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