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Author: N. Ahmad Publisher: Springer Science & Business Media ISBN: 9400917066 Category : Science Languages : en Pages : 430
Book Description
Nitrogen Economy in Tropical Soils presents an authoritative and comprehensive state-of-the-art review on soil/plant nitrogen inter-relationships, with special reference to tropical soils and crops in aerobic and anaerobic environments. Use of isotopically labelled nitrogen in experimentation, especially in tropical environments, and recently developed analytical techniques for soil and plant materials are presented. An important aspect is the emphasis placed on the impact of the tropical environment on nitrogen transformations in the soil environment. This book should be an excellent source of information for senior undergraduate and graduate students with interest in soil/plant nitrogen inter-relationships, and for all levels of research workers in these fields.
Author: N. Ahmad Publisher: Springer Science & Business Media ISBN: 9400917066 Category : Science Languages : en Pages : 430
Book Description
Nitrogen Economy in Tropical Soils presents an authoritative and comprehensive state-of-the-art review on soil/plant nitrogen inter-relationships, with special reference to tropical soils and crops in aerobic and anaerobic environments. Use of isotopically labelled nitrogen in experimentation, especially in tropical environments, and recently developed analytical techniques for soil and plant materials are presented. An important aspect is the emphasis placed on the impact of the tropical environment on nitrogen transformations in the soil environment. This book should be an excellent source of information for senior undergraduate and graduate students with interest in soil/plant nitrogen inter-relationships, and for all levels of research workers in these fields.
Author: Pedro A. Sanchez Publisher: Cambridge University Press ISBN: 1107176050 Category : Business & Economics Languages : en Pages : 685
Book Description
Long-awaited second edition of classic textbook, brought completely up to date, for courses on tropical soils, and reference for scientists and professionals.
Author: N Ahmad Publisher: ISBN: 9789400917071 Category : Languages : en Pages : 456
Book Description
Nitrogen Economy in Tropical Soils presents an authoritative and comprehensive state-of-the-art review on soil/plant nitrogen inter-relationships, with special reference to tropical soils and crops in aerobic and anaerobic environments. Use of isotopically labelled nitrogen in experimentation, especially in tropical environments, and recently developed analytical techniques for soil and plant materials are presented. An important aspect is the emphasis placed on the impact of the tropical environment on nitrogen transformations in the soil environment. This book should be an excellent source of information for senior undergraduate and graduate students with interest in soil/plant nitrogen inter-relationships, and for all levels of research workers in these fields.
Author: S.K. de Datta Publisher: Springer Science & Business Media ISBN: 9400944284 Category : Nature Languages : en Pages : 191
Book Description
The steadily increasing cost of nitrogen fertilizer has resulted in more emphasis on basic and applied studies to improve nitrogen use efficiency in lowland rice. The efficiency of fertilizer nitrogen in farmers' fields is shockingly low ~ a luxury resource-scarce farmers in tropical Asia can ill afford. We believe it is critical to quantify the basic transformation processes and develop management practices for higher N use efficiency for two reasons. They are: 1. Nitrogen fertilizer together with water management is a key factor for achieving the yield potentials of modern rices. 2. Fertilizer nitrogen prices are high and most Asian rice farmers are poor. The International Rice Research Institute (IRRI), Philippines; Internation al Fertilizer Development Center (IFDC), USA; Commonwealth Scientific and Industrial Research Organization (CSIRO), Australia; U.S. Universities (Louisiana, Cornell, California, Arkansas and others); and Dr Justus Leibig University in West Germany are actively engaged in individual or collaborative research that addresses basic transformation processes on N gains and losses and management practices to maximize N use efficiency in rice. It is appropriate to update and summarize, in a double issue of Fertilizer Research, the 10 papers presented at the special symposium organized by the American Society of Agronomy (ASA) at the 75th Annual Meeting in Washington, D.C. in 1983. S.K. De Datta, Head of Agronomy Department, IRRI, was chairman of the International Agronomy Division of ASA (A-6) in 1982 and 1983.
Author: Y.R. Dommergues Publisher: Springer Science & Business Media ISBN: 9789024726240 Category : Nature Languages : en Pages : 346
Book Description
It is an established fact that we must continually increase and improve agricultural production if we are to meet even the minimum requirements of a growing popu lation for food, shelter, and fuel. In recent years, the introduction of new plant varieties and the extensive use of fertilizers have effectively increased crop yields, but intensifying agricultural methods has often led to depleting soil fertility. Two examples of the harmful consequences of intensive farming practices are the loss of up to 2.5 cm of topsoil every 15 years in the United States through erosion and the alarming rise in environmental pollution through widespread use of pesticides. Countless other processes affecting the activity of soil micro flora and the inter actions between microorganisms and plants may pose an equal danger to soil equilibrium, but their potential hazards are often overlooked because of an insufficient understanding of soil microbiology on the part of scientists. In the first published study of its kind, the authors of this book have attempted to address major aspects of the microbial activity of soil in the tropics. Tropical conditions serve as an ideal context for a discussion of soil microbiology, since biological processes in the soil are particularly active in tropical environments in comparison to other settings and in relation to physical and chemical processes.
Author: William Victor Bartholomew Publisher: ISBN: Category : Science Languages : en Pages : 640
Book Description
Origin and distribution of nitrogen in soil. Soil inorganic nitrogen. Organic nitrogen in soils. Ammonium fixation and other reactions involving a nonenzymatic immobilization of mineral nitrogen in soil. Mineralization and immobilization of nitrogen in the decomposition of plant and animal residues. Nitrification. Denitrification. Symbiotic nitrogen fixation. Environmental factors in the fixation of nitrogen by the legume. Nonsymbiotic nitrogen fixation. The plant's need for and use of nitrogen. Movement of nitrogen in soil. Evaluation of incoming and outgoing processes thar affect soil nitrogen.
Author: Y.R. Dommergues Publisher: Springer Science & Business Media ISBN: 9400975295 Category : Nature Languages : en Pages : 329
Book Description
It is an established fact that we must continually increase and improve agricultural production if we are to meet even the minimum requirements of a growing popu lation for food, shelter, and fuel. In recent years, the introduction of new plant varieties and the extensive use of fertilizers have effectively increased crop yields, but intensifying agricultural methods has often led to depleting soil fertility. Two examples of the harmful consequences of intensive farming practices are the loss of up to 2.5 cm of topsoil every 15 years in the United States through erosion and the alarming rise in environmental pollution through widespread use of pesticides. Countless other processes affecting the activity of soil micro flora and the inter actions between microorganisms and plants may pose an equal danger to soil equilibrium, but their potential hazards are often overlooked because of an insufficient understanding of soil microbiology on the part of scientists. In the first published study of its kind, the authors of this book have attempted to address major aspects of the microbial activity of soil in the tropics. Tropical conditions serve as an ideal context for a discussion of soil microbiology, since biological processes in the soil are particularly active in tropical environments in comparison to other settings and in relation to physical and chemical processes.
Author: John Keith Syers Publisher: Oxford University Press, USA ISBN: Category : Technology & Engineering Languages : en Pages : 310
Book Description
Soil science and sustainable land management. Evaluation of the soil and land resource. Proposals for quantitative criteria in the management of sutainable agricultural systems. Soil erosion and conservation: A place for soil science? Agroforestry practices to control runoff and erosion on steeplands in ilocos norte, Philippines. The qurternary legacy in the tropics. Fundamental Property of the land resource. Effects of soil erosion and sedimentation on land qualy. Defining pedofenetic baselines in the kondoa distric of Tanzania. Sustainable regeneration of surface tilth in Zimbawean vertisols through water management. Agrohydrological modelling. A tool for sustainable development of land resources. Extending the growing season by efficient use of rainfall. The role soil organisms in the sustainability of tropical cropping sustems. Can biological nitrogen fixation sustain agriculture in the tropics? Improving the agriculturakl productivity of the soils of Northeast Thailand through soil organic matter management. Soil organic matter management in Thailand. A diagnostic approach to solving soil fertility problems in the tropics. Physical and chemical constraints to sustainable soil use under raingfed conditions in the himid tripocs of Southar Asia. The use of simplified nutrient balances at farm level to determine boudary conditions for sustainable production. The economic context of soil science. Soil Science research developing contries. Towards a holistic approach. Soil science and better land use in the tropics.
Author: N. Ahmad
Author: N. Ahmad
Author: Pedro A. Sanchez
Author: N Ahmad
Author: S.K. de Datta
Author: Y.R. Dommergues
Author: William Victor Bartholomew
Author: Y.R. Dommergues
Author: 
Author: John Keith Syers
Author: