Biological Processes And Soil Fertility
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Biological Processes And Soil Fertility
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Author : J. Tinsley
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Biological Processes And Soil Fertility written by J. Tinsley and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Nature categories.
The success of shifting cultivation systems developed by subsistence farmers testifies to the resilience of the "natural" soil-plant ecosystems to recover from the offtake of nutrients in crops and loss of soil struc ture. By contrast, the development of intensive cropping systems requires large inputs especially of nitrogen, together with phosphorus, sulphur and other essential elements in order to maintain the nutrient levels needed for abundant crop yields. As Dr. Cooke ably pointed out in his introductory lecture, the dis coveries and experiments of the 19th century encouraged farmers in temperate zones to rely greatly on chemical fertilizers supplements. However, the work of Charles Da{win on soil mixing by earthworms and the discovery by Hellriegel and Wilfarth in 1886 that the nodules on legume roots contain colonies of symbiotic bacteria able to "capture" atmospheric nitrogen molecules to the benefit of the host plant heralded a growing realization of the importance of soil biota in fertility studies. Biological fixation of nitrogen has been the theme of many meetings and publi~ations hitherto but at this Conference, convened on the delightful campus of Reading University, attention was mainly focussed on other biological processes in soil fertility. These Proceedings record the dominant themes and include six keynote addresses delivered at plenary sessions and seven introductory lectures to paper reading sessions by invited individuals plus 22 of the proferred papers, in six sections as tabled in the contents list.
Soil Biological Fertility
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Author : Lynette K. Abbott
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-10-23
Soil Biological Fertility written by Lynette K. Abbott and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-10-23 with Nature categories.
It is becoming more relevant to explore soil biological processes in terms of their contribution to soil fertility. This book presents a comprehensive scientific overview of the components and processes that underpin the biological characteristics of soil fertility. It highlights the enormous diversity of life in soil and the resulting effects that management of land can have on the contribution of this diverse community to soil fertility in an agricultural context.
Soil Biological Processes And Tropical Soil Fertility
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Author : Michael John Swift
language : en
Publisher:
Release Date : 1984
Soil Biological Processes And Tropical Soil Fertility written by Michael John Swift and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Soil biology categories.
Trees Crops And Soil Fertility
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Author : G. Schroth
language : en
Publisher: CABI
Release Date : 2003-02-19
Trees Crops And Soil Fertility written by G. Schroth and has been published by CABI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-02-19 with Technology & Engineering categories.
Annotation. Successful agroforestry requires an understanding of the complex relationship between trees, crops and soils. This book provides a review of both economic and biophysical aspects of soil use and research in agroforestry, with an emphasis on nutrient-poor forest and savanna soils. Key topics covered include the economics of soil fertility management, cycling of water, nutrients and organic matter, soil structure, and soil biological processes. The book combines synthetic overviews of research results and a review of methods used in research.From the foreword: 2The book is written within a particular context - soil fertility development under agroforestry. At first this may seem very specific and thus limited in appeal and application. But over the last decade or so agroforestry research has been one of the most influential in developing new insights into soil biology and fertility and thus provides a very suitable framework for review of progress. Furthermore the influence of trees on soil is profound and of significance beyond agroforestry systems, so the book is likely to be of interest in the wider spheres of agriculture, forestry and ecological sciences.3 Mike Swift, TSBF, Nairobi, Kenya.
Microbiology Of Tropical Soils And Plant Productivity
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Author : Y.R. Dommergues
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Microbiology Of Tropical Soils And Plant Productivity written by Y.R. Dommergues and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Nature categories.
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.
Soil Fertility
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Author : Roland Nuhu Issaka
language : en
Publisher:
Release Date : 2012
Soil Fertility written by Roland Nuhu Issaka and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Soil Fertility book presents nine chapters written by renowned soil fertility experts from Africa, Asia and South America. The book is divided into two sections. Section 1, Biological Processes and Integration of Inorganic and Organic Fertilizers for Soil Fertility Improvement, examines biological processes that can enhance the soil fertility. It discusses the use of both organic and inorganic fertilizers and their integration in improving soil fertility. The second section, Improving Fertilizer Recommendation and Efficiency, looks at the state-of-the-art in leaf sampling and analysis. Proper leaf sampling and standardized methods of analysis are important steps in providing good recommendations.
Soil Conditions And Plant Growth
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Author : Peter J. Gregory
language : en
Publisher: John Wiley & Sons
Release Date : 2013-03-04
Soil Conditions And Plant Growth written by Peter J. Gregory and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-04 with Science categories.
Building on the extremely successful and popular Russell’s Soil Conditions and Plant Growth, Wiley-Blackwell is pleased to publish this completely revised and updated edition of the soil science classic. Covering all aspects of the interactions between plant and soil, Peter Gregory and Stephen Nortcliff, along with their team of internationally-known and respected authors, provide essential reading for all students and professionals studying and working in agriculture and soil science. Subject areas covered range from crop science and genetics; soil fertility and organic matter; nitrogen and phosphoros cycles and their management; properties and management of plant nutrients; water and the soil physical environment and its management; plants and change processes in soils; management of the soil/plant system; and new challenges including food, energy and water security in a changing environment. Providing a very timely account on how better to understand and manage the many interactions that occur between soils and plants, Soil Conditions and Plant Growth is sure to become the book of choice - as a recommended text for students and as an invaluable reference for those working or entering into the industry. An essential purchase for all universities and research establishments where agricultural, soil, and environmental sciences are studied and taught.
Soil Microbial Associations
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Author : V. Vancura
language : en
Publisher: Elsevier
Release Date : 2012-12-02
Soil Microbial Associations written by V. Vancura and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-02 with Technology & Engineering categories.
This volume is the first publication of its kind to provide a fully comprehensive and detailed approach to the survey of microbial associations in soil: their structure and function in relation to soil fertility and environment protection. The problems covered by this title are presented on various levels of the ecological system; from subcellular phenomena occurring in the microbial cell (genetic and enzyme regulation), to processes taking place in the flow of mass and energy in the agroecosystem. The aim of this monograph is to contribute to the understanding of the laws of formation and function of microbial associations in natural and agricultural soils, and to build a scientific basis for the control of soil biological processes. Using a contemporary approach to some fields of soil microbiology, the book highlights the possibility of utilizing certain microorganisms and microbial processes to increase soil fertility and protect the environment. These critically evaluated and selected results were obtained at the Institute of Microbiology and the Institute of Experimental Phytotechnics of the Czechoslovak Academy of Sciences, in cooperation with the Institute of Microbiology of the Academy of Sciences of the USSR.
Nitrogen Fixation At The Millennium
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Author : G.J. Leigh
language : en
Publisher: Elsevier
Release Date : 2002-11-22
Nitrogen Fixation At The Millennium written by G.J. Leigh and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-11-22 with Science categories.
The turn of the millennium from the twentieth to the twenty-first century provides an occasion to review our understanding of a biological process, biological nitrogen fixation, that is of prime importance for the continued survival of mankind. This process has provided a basis for maintaining soil fertility since the beginning of organised agriculture, yet its very existence was confirmed only just over a century ago. In the intervening years, an enormous intellectual effort has dispersed much of the mystery surrounding biological nitrogen fixation. Biological fixation is widely exploited in agriculture, as are nitrogen fertilisers prepared for the last hundred years under extreme conditions of temperature and pressure. However, despite all our efforts, the fundamental nature of the reactions involved at the heart of the biological process remain unknown. This book aims to describe what we have learned in the last one hundred years or so about biological nitrogen fixation, about what its chemistry appears to be, and how it is applied in agriculture. This ambitious objective has not been attempted recently. It is aimed at students and those who wish to enter these very challenging areas of research, and who need to learn the state of the art at the turn of the millennium. The authors are all acknowledged world experts in their fields. They have prepared concise, well referenced and authoritative accounts of their subjects. This book provides a unique summary of the current state of knowledge that will be indispensable to all students and researchers, actual and potential, interested in biological nitrogen fixation.
Introduction To Soil Microbiology
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Author : Martin Alexander
language : en
Publisher:
Release Date : 1977-06-23
Introduction To Soil Microbiology written by Martin Alexander and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977-06-23 with Science categories.
Characterizes soil microflora from descriptive and functional viewpoints; considers the biological processes that take place in the soil and their importance to soil fertility, plant growth, and environmental quality. Deals with the biochemical basis for soil processes, including microbial ecology, the carbon and nitrogen cycles, mineral transformation, and ecological interrelationships.