Carbon And Nitrogen Dynamics In Flooded Soils
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Carbon And Nitrogen Dynamics In Flooded Soils
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Author : G. J. D. Kirk
language : en
Publisher: Int. Rice Res. Inst.
Release Date : 2000
Carbon And Nitrogen Dynamics In Flooded Soils written by G. J. D. Kirk and has been published by Int. Rice Res. Inst. this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Rice categories.
Climatic Controls On Deep Soil Carbon And Nitrogen Dynamics
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Author : Kimber Candice Moreland
language : en
Publisher:
Release Date : 2020
Climatic Controls On Deep Soil Carbon And Nitrogen Dynamics written by Kimber Candice Moreland and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
The soil system stores more carbon than the atmosphere and biosphere combined. However, until recently, most studies on soil organic matter dynamics had focused on near surface soil organic carbon (C) dynamics with relatively little attention devoted to determining how much C and nitrogen (N) is stored in deep soil layers, and how climate influences deep soil organic C and N dynamics. Hence, our understanding of how climate influences the mechanisms that regulate the magnitude and direction of changes in deep soil organic matter remain incomplete. In my dissertation research, I studied soils that developed under four different climatic regimes along an elevation gradient on the western slopes of the Sierra Nevada in California (site of the Southern Sierra Critical Zone Observatory). Using soil samples that were collected from the surface down to bedrock contact (that extended to more than 10 m below the surface), I determined how climate regulates deep soil organic carbon and nitrogen stocks, chemical composition of organic matter, mean residence times of soil carbon and nitrogen at depth; and conducted statistical analyses to determine how variability of climate along the SSCZO bio-climosequence is related to a range of climatic variables. In the first chapter, I found that up to 78% of soil C is stored below a 0.3-m depth, with up to 29% of total C stored in saprock below 1.5 m. A conservative global scaling of these results illustrates that deep regolith stores over 200 Pg of organic carbon quantifying a previously unrealized organic carbon pool in the Earth system. In the second chapter, I dug deeper into C stabilization mechanisms and how climate impacts distribution of C in free and mineral protected pools of soil C.I discovered that the radiocarbon concentration of C in the topsoil and subsoil free particulate and subsoil mineral associated fractions had a statistically significant relationship with climate. However, the aggregate protected pool of C was not influenced by climate, suggesting that the free particulate and subsoil mineral associated fractions of subsoil C are vulnerable to changes in climate. The third chapter focused on dynamics of soil N in topsoil compared to subsoils and shows that climate imposes important controls on N in topsoil and subsoil free particulate and occluded fractions. The mineral associated N was not found to be sensitive to changes in climate. Overall, my dissertation research demonstrated both indirect and direct mechanisms through which climate can impact soil C and N dynamics from the topsoil to bedrock contact. I presented substantial evidence to refute the long-held assumption that subsoil organic matter does not respond to changes in atmospheric climate.
The Ecology And Management Of Wetlands
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Author : Donal D. Hook
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
The Ecology And Management Of Wetlands written by Donal D. Hook 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 Science categories.
This book contains the proceedings of a symposium held at the College of Charleston, Charleston, South Carolina, USA, 16-20 June 1986. The seed for this symposium arose from a group of physiologists , soU scientists and biochemists that met in Leningrad, USSR in July 1975 at the 12th Botanical Conference in a Session organized by Professor B.B. Vartepetian. This group and others later conspired to contribute to a book entitled Plant Life in Anaerobic Environments (eds. D. D. Hook and R. M. M. Crawford, Ann Arbor Science, 1978). Several contributors to the book suggested in 1983 that a broad-scoped symposium on wetlands would be useful (a) in facilitating communication among the diverse research groups involved in wetlands research (b) in bringing researchers and managers together and (c) in presenting a com prehensive and balanced coverage on the status of ecology ami management of wetlands from a global perspective. With this encouragement, the senior editor organized a Plan ning Committee that encompassed expertise from many disciplines of wetland scientists and managers. This Committee, with input from their colleagues around the world, organized a symposium that addressed almost every aspect of wetland ecology and management.
Soil Carbon Dynamics
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Author : Werner L. Kutsch
language : en
Publisher: Cambridge University Press
Release Date : 2010-01-07
Soil Carbon Dynamics written by Werner L. Kutsch and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-01-07 with Technology & Engineering categories.
Carbon stored in soils represents the largest terrestrial carbon pool and factors affecting this will be vital in the understanding of future atmospheric CO2 concentrations. This book provides an integrated view on measuring and modeling soil carbon dynamics. Based on a broad range of in-depth contributions by leading scientists it gives an overview of current research concepts, developments and outlooks and introduces cutting-edge methodologies, ranging from questions of appropriate measurement design to the potential application of stable isotopes and molecular tools. It includes a standardised soil CO2 efflux protocol, aimed at data consistency and inter-site comparability and thus underpins a regional and global understanding of soil carbon dynamics. This book provides an important reference work for students and scientists interested in many aspects of soil ecology and biogeochemical cycles, policy makers, carbon traders and others concerned with the global carbon cycle.
Increasing Productivity Of Intensive Rice Systems Through Site Specific Nutrient Management
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Author : A. Dobermann (Ed)
language : en
Publisher: Int. Rice Res. Inst.
Release Date : 2004
Increasing Productivity Of Intensive Rice Systems Through Site Specific Nutrient Management written by A. Dobermann (Ed) and has been published by Int. Rice Res. Inst. this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Rice categories.
Organic Agricultural Practices
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Author : Kimberly Etingoff
language : en
Publisher: CRC Press
Release Date : 2014-09-06
Organic Agricultural Practices written by Kimberly Etingoff and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-09-06 with Science categories.
This title includes a number of Open Access chapters.Organic practices are quickly redefining how agriculture is done around the world, as we come to realize how detrimental conventional agriculture is to local and global environments and economies. This book serves as an overview of some of the important topics in organic agriculture. The vol
Sustainable Management Of Soil Organic Matter
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Author : R. M. Rees
language : en
Publisher: CABI
Release Date : 2000-12-11
Sustainable Management Of Soil Organic Matter written by R. M. Rees and has been published by CABI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000-12-11 with Technology & Engineering categories.
Includes some fifty edited and revised papers from an international conference on Sustainable Management of Soil Organic Matter, held by the British Society of Soil Science in Edinburgh in September 1999. The book explores the results of recent research studies examining how organic matter functions in soils, factors affecting organic matter quality and quantity and how management of organic matter can be optimised in order to achieve sustainable farming practices.
The Biogeochemistry Of Submerged Soils
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Author : Guy Kirk
language : en
Publisher: John Wiley & Sons
Release Date : 2004-06-25
The Biogeochemistry Of Submerged Soils written by Guy Kirk 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 2004-06-25 with Science categories.
Submerged soils and the wetlands they support are of huge practical importance: in global element cycles, as centres of biodiversity, in global food production. They are also uniquely interesting scientifically because of their peculiar biogeochemistry and the adaptations of plants and microbes to it. This book describes the physical, chemical and biological processes operating in submerged soils and governing their properties. It describes the transport processes controlling the fluxes of gases and solutes through the soil; the interchange of solutes between solid, liquid and gas phases; reduction and oxidation processes; biological processes in the soil and overlying water; and processes in the roots and rhizospheres of wetland plants. The dynamics of nutrients, toxins, pollutants and trace gases are then discussed in terms of these processes and in relation to wetland productivity and global element cycles. Written by a renowned expert in the field, this work will be invaluable to earth, environmental and agricultural scientists concerned with natural or man-made wetlands, and to advanced undergraduate and graduate studen ts of these topics.
Blessings From Nature And Science For The Future
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Author :
language : en
Publisher: Int. Rice Res. Inst.
Release Date :
Blessings From Nature And Science For The Future written by and has been published by Int. Rice Res. Inst. this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
The Quest For Connections Developing A Research Agenda For Integrated Pest And Nutrient Management
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Author :
language : en
Publisher: Int. Rice Res. Inst.
Release Date :
The Quest For Connections Developing A Research Agenda For Integrated Pest And Nutrient Management written by and has been published by Int. Rice Res. Inst. this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.