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A Test Of The Nutrient Non Substitution Hypothesis In Crop Response And Fertilizer Carryover Analysis
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Book Synopsis A Test of the Nutrient Non-substitution Hypothesis in Crop Response and Fertilizer Carryover Analysis by : Ackello-Ogutu
Download or read book A Test of the Nutrient Non-substitution Hypothesis in Crop Response and Fertilizer Carryover Analysis written by Ackello-Ogutu and published by . This book was released on 1982 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Estimation of Water and Nitrogen Crop Response Functions by : Sadi Sergio Grimm
Download or read book Estimation of Water and Nitrogen Crop Response Functions written by Sadi Sergio Grimm and published by . This book was released on 1986 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the 1950's the use of polynomial production functions has become almost a standard approach to describe crop response to fertilizers and irrigation water, particularly among agricultural economists. The appropriateness of the polynomial forms is supported on basis of their good predictive ability, since high R2s are usually obtained. They have been used, however, as an approximation tool rather than based on some justification from a theoretical standpoint and, in fact, they contradict the principle of nonsubstitution among essential elements in physiological processes. This study submits to a rigorous hypothesis test the polynomial forms against a factor nonsubstitution model specification in terms of their appropriateness in describing crop response toirrigation water and nitrogen. The polynomial forms used are the quadratic, the three halves and the square root, which are estimated by using conventional multiple linear regression procedures. The basic specification for the factor nonsubstitution model consisted in assuming a linear response with a sharp transition to a plateau type maximum. This linear-plateau specification incorporates the principles of the "law of the minimum", proposed by von Liebig circa 1840. However, several other alternative formulations, assuming nonlinear output increases, are also studied. ...
Author :Giannini Foundation of Agricultural Economics Publisher :Giannini Foundation of Agricultural Economics University of California ISBN 13 : Total Pages :422 pages Book Rating :4.:/5 (31 download)
Book Synopsis A.P. Giannini and the Giannini Foundation of Agricultural Economics by : Giannini Foundation of Agricultural Economics
Download or read book A.P. Giannini and the Giannini Foundation of Agricultural Economics written by Giannini Foundation of Agricultural Economics and published by Giannini Foundation of Agricultural Economics University of California. This book was released on 2009 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Annals of the Giannini Foundation of Agricultural Economics by : Giannini Foundation of Agricultural Economics
Download or read book Annals of the Giannini Foundation of Agricultural Economics written by Giannini Foundation of Agricultural Economics and published by . This book was released on 2006 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis African Crop Science Conference Proceedings by :
Download or read book African Crop Science Conference Proceedings written by and published by . This book was released on 1997 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis East African Agricultural Journal of Kenya, Tanganyika, Uganda and Zanzibar by :
Download or read book East African Agricultural Journal of Kenya, Tanganyika, Uganda and Zanzibar written by and published by . This book was released on 1983 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis World Agricultural Economics and Rural Sociology Abstracts by :
Download or read book World Agricultural Economics and Rural Sociology Abstracts written by and published by . This book was released on 1984 with total page 1588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pollution Abstracts written by and published by . This book was released on 1983 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt: Indexes material from conference proceedings and hard-to-find documents, in addition to journal articles. Over 1,000 journals are indexed and literature published from 1981 to the present is covered. Topics in pollution and its management are extensively covered from the standpoints of atmosphere, emissions, mathematical models, effects on people and animals, and environmental action. Major areas of coverage include: air pollution, marine pollution, freshwater pollution, sewage and wastewater treatment, waste management, land pollution, toxicology and health, noise, and radiation.
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1982 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Food and Agriculture Organization of the United Nations Publisher :Food & Agriculture Org. ISBN 13 :9251068712 Total Pages :116 pages Book Rating :4.2/5 (51 download)
Book Synopsis Save and Grow by : Food and Agriculture Organization of the United Nations
Download or read book Save and Grow written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2018-06-22 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book offers a rich toolkit of relevant, adoptable ecosystem-based practices that can help the world's 500 million smallholder farm families achieve higher productivity, profitability and resource-use efficiency while enhancing natural capital.
Book Synopsis Modelling Nutrient Management in Tropical Cropping Systems by : R. J. Delve
Download or read book Modelling Nutrient Management in Tropical Cropping Systems written by R. J. Delve and published by . This book was released on 2004 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Prices of Fertilizers by : H. L. Trumbull
Download or read book Prices of Fertilizers written by H. L. Trumbull and published by . This book was released on 1919 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optimal Control Theory and Static Optimization in Economics by : Daniel Léonard
Download or read book Optimal Control Theory and Static Optimization in Economics written by Daniel Léonard and published by Cambridge University Press. This book was released on 1992-01-31 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optimal control theory is a technique being used increasingly by academic economists to study problems involving optimal decisions in a multi-period framework. This textbook is designed to make the difficult subject of optimal control theory easily accessible to economists while at the same time maintaining rigour. Economic intuitions are emphasized, and examples and problem sets covering a wide range of applications in economics are provided to assist in the learning process. Theorems are clearly stated and their proofs are carefully explained. The development of the text is gradual and fully integrated, beginning with simple formulations and progressing to advanced topics such as control parameters, jumps in state variables, and bounded state space. For greater economy and elegance, optimal control theory is introduced directly, without recourse to the calculus of variations. The connection with the latter and with dynamic programming is explained in a separate chapter. A second purpose of the book is to draw the parallel between optimal control theory and static optimization. Chapter 1 provides an extensive treatment of constrained and unconstrained maximization, with emphasis on economic insight and applications. Starting from basic concepts, it derives and explains important results, including the envelope theorem and the method of comparative statics. This chapter may be used for a course in static optimization. The book is largely self-contained. No previous knowledge of differential equations is required.
Book Synopsis Nitrogen in Agricultural Systems by : James Stuart Schepers
Download or read book Nitrogen in Agricultural Systems written by James Stuart Schepers and published by ASA-CSSA-SSSA. This book was released on 2008 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt: Review of the principles and management implications related to nitrogen in the soil-plant-water system.
Book Synopsis Mineral Nutrition of Maize by : I. Arnon
Download or read book Mineral Nutrition of Maize written by I. Arnon and published by . This book was released on 1975 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: Background information; Cropping systems and rotations; Tillage; From sowing to harvest; Nutritional requirements of maize.
Download or read book Quinoa written by Kevin S. Murphy and published by John Wiley & Sons. This book was released on 2015-06-29 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quinoa is an ancient grain that has grown in popularity in recent years. It has been known as a good source of both protein and fiber. As the demand for quinoa increases a comprehensive and up-to-date reference on the biology and production of the crop is essential. Quinoa: Improvement and Sustainable Production brings together authors from around the world to provide a complete assessment of the current state of global quinoa research and production. Topics covered include quinoa history and culture, genomics and breeding, agronomy, nutrition, marketing, and end-uses. The book focuses in particular on the emerging role of quinoa in providing increased food security to smallholder farmers and communities throughout the world. Quinoa will interest quinoa researchers, producers, crop scientists, agronomists, and plant geneticists, as well as advanced students working with this important grain.
Book Synopsis Crop Stress and its Management: Perspectives and Strategies by : B. Venkateswarlu
Download or read book Crop Stress and its Management: Perspectives and Strategies written by B. Venkateswarlu and published by Springer Science & Business Media. This book was released on 2011-11-22 with total page 617 pages. Available in PDF, EPUB and Kindle. Book excerpt: Crops experience an assortment of environmental stresses which include abiotic viz., drought, water logging, salinity, extremes of temperature, high variability in radiation, subtle but perceptible changes in atmospheric gases and biotic viz., insects, birds, other pests, weeds, pathogens (viruses and other microbes). The ability to tolerate or adapt and overwinter by effectively countering these stresses is a very multifaceted phenomenon. In addition, the inability to do so which renders the crops susceptible is again the result of various exogenous and endogenous interactions in the ecosystem. Both biotic and abiotic stresses occur at various stages of plant development and frequently more than one stress concurrently affects the crop. Stresses result in both universal and definite effects on plant growth and development. One of the imposing tasks for the crop researchers globally is to distinguish and to diminish effects of these stress factors on the performance of crop plants, especially with respect to yield and quality of harvested products. This is of special significance in view of the impending climate change, with complex consequences for economically profitable and ecologically and environmentally sound global agriculture. The challenge at the hands of the crop scientist in such a scenario is to promote a competitive and multifunctional agriculture, leading to the production of highly nourishing, healthy and secure food and animal feed as well as raw materials for a wide variety of industrial applications. In order to successfully meet this challenge researchers have to understand the various aspects of these stresses in view of the current development from molecules to ecosystems. The book will focus on broad research areas in relation to these stresses which are in the forefront in contemporary crop stress research.
