Download or read book The Relation of Carbon to Nitrogen in Various Types of Soils written by Roy Eugene Smith and published by . This book was released on 1909 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Carbon Nitrogen Ratio in Soils written by Stirling Waterman and published by . This book was released on 1925 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Color of Soils in Relation to Organic Matter Content written by Percy Edgar Brown and published by . This book was released on 1923 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling Carbon and Nitrogen Dynamics for Soil Management written by M J Shaffer and published by CRC Press. This book was released on 2019-08-30 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: Good management practices for carbon and nitrogen are vital to crop productivity and soil sustainability, as well as to the reduction of global greenhouse gases and environmental pollution. Since the 1950's, mathematical models have advanced our understanding of carbon and nitrogen cycling at both the micro- and macro-scales. However, many of the models are scattered in the literature, undergo constant modification, and similar models can have different names. Modeling Carbon and Nitrogen Dynamics for Soil Management clarifies the confusion by presenting a systematic summary of the various models available. It provides information about strengths and weaknesses, level of complexity, easiness of use, and application range of each model. In nineteen chapters, internationally known model developers and users update you on the current status and future direction of carbon and nitrogen modeling. The book's coverage ranges from theoretical comparison of models to application of models to soil management problems, from laboratory applications to field and watershed scale applications, from short-term simulation to long-term prediction, and from DOS-based computer programs to Object-Oriented and Graphical Interface designs. With this broad scope, Modeling Carbon and Nitrogen Dynamics for Soil Management provides the tools to manage complex carbon/nitrogen processes effectively.
Download or read book Carbon Nitrogen and Phosphorus Cycling in Forest Soils written by Robert G. Qualls and published by MDPI. This book was released on 2019-06-21 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: The majority of carbon stored in the soils of the world is stored in forests. The refractory nature of some portions of forest soil organic matter also provides the slow, gradual release of organic nitrogen and phosphorus to sustain long term forest productivity. Contemporary and future disturbances, such as climatic warming, deforestation, short rotation sylviculture, the invasion of exotic species, and fire, all place strains on the integrity of this homeostatic system of C, N, and P cycling. On the other hand, the CO2 fertilization effect may partially offset losses of soil organic matter, but many have questioned the ability of N and P stocks to sustain the CO2 fertilization effect. Despite many advances in the understanding of C, N, and P cycling in forest soils, many questions remain. For example, no complete inventory of the myriad structural formulae of soil organic N and P has ever been made. The factors that cause the resistance of soil organic matter to mineralization are still hotly debated. Is it possible to “engineer” forest soil organic matter so that it sequesters even more C? The role of microbial species diversity in forest C, N, and P cycling is poorly understood. The difficulty in measuring the contribution of roots to soil organic C, N, and P makes its contribution uncertain. Finally, global differences in climate, soils, and species make the extrapolation of any one important study difficult to extrapolate to forest soils worldwide.
Download or read book Nitrogen and Carbon Changes in Great Plains Soils as Influenced by Cropping and Soil Treatments written by Howard J. Haas and published by . This book was released on 1957 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Carbon and Nitrogen Cycling in Soil written by Rahul Datta and published by Springer Nature. This book was released on 2019-08-24 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several textbooks and edited volumes are currently available on general soil fertility but‚ to date‚ none have been dedicated to the study of “Sustainable Carbon and Nitrogen Cycling in Soil.” Yet this aspect is extremely important, considering the fact that the soil, as the ‘epidermis of the Earth’ (geodermis)‚ is a major component of the terrestrial biosphere. This book addresses virtually every aspect of C and N cycling, including: general concepts on the diversity of microorganisms and management practices for soil, the function of soil’s structure-function-ecosystem, the evolving role of C and N, cutting-edge methods used in soil microbial ecological studies, rhizosphere microflora, the role of organic matter (OM) in agricultural productivity, C and N transformation in soil, biological nitrogen fixation (BNF) and its genetics, plant-growth-promoting rhizobacteria (PGPRs), PGPRs and their role in sustainable agriculture, organic agriculture, etc. The book’s main objectives are: (1) to explain in detail the role of C and N cycling in sustaining agricultural productivity and its importance to sustainable soil management; (2) to show readers how to restore soil health with C and N; and (3) to help them understand the matching of C and N cycling rules from a climatic perspective. Given its scope, the book offers a valuable resource for educators, researchers, and policymakers, as well as undergraduate and graduate students of soil science, soil microbiology, agronomy, ecology, and the environmental sciences. Gathering cutting-edge contributions from internationally respected researchers, it offers authoritative content on a broad range of topics, which is supplemented by a wealth of data, tables, figures, and photographs. Moreover, it provides a roadmap for sustainable approaches to food and nutritional security, and to soil sustainability in agricultural systems, based on C and N cycling in soil systems.
Download or read book Worldwide Organic Soil Carbon and Nitrogen Data written by and published by . This book was released on 1986 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods of Soil Analysis Part 3 written by D. L. Sparks and published by John Wiley & Sons. This book was released on 2020-01-22 with total page 1424 pages. Available in PDF, EPUB and Kindle. Book excerpt: A thorough presentation of analytical methods for characterizing soil chemical properties and processes, Methods, Part 3 includes chapters on Fourier transform infrared, Raman, electron spin resonance, x-ray photoelectron, and x-ray absorption fine structure spectroscopies, and more.
Download or read book Soil Management and Climate Change written by Maria Angeles Munoz and published by Academic Press. This book was released on 2017-10-16 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil Management and Climate Change: Effects on Organic Carbon, Nitrogen Dynamics, and Greenhouse Gas Emissions provides a state of the art overview of recent findings and future research challenges regarding physical, chemical and biological processes controlling soil carbon, nitrogen dynamic and greenhouse gas emissions from soils. This book is for students and academics in soil science and environmental science, land managers, public administrators and legislators, and will increase understanding of organic matter preservation in soil and mitigation of greenhouse gas emissions. Given the central role soil plays on the global carbon (C) and nitrogen (N) cycles and its impact on greenhouse gas emissions, there is an urgent need to increase our common understanding about sources, mechanisms and processes that regulate organic matter mineralization and stabilization, and to identify those management practices and processes which mitigate greenhouse gas emissions, helping increase organic matter stabilization with suitable supplies of available N. - Provides the latest findings about soil organic matter stabilization and greenhouse gas emissions - Covers the effect of practices and management on soil organic matter stabilization - Includes information for readers to select the most suitable management practices to increase soil organic matter stabilization
Download or read book The Effect of Soil Particle Type Temperature and Aeration on Soil Organic Matter Ond Nitrogen written by Oluwasuyi Odeyemi and published by . This book was released on 1974 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Survey Report written by Iowa Agriculture and Home Economics Experiment Station and published by . This book was released on 1921 with total page 1106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microorganisms in Soils Roles in Genesis and Functions written by Francois Buscot and published by Springer Science & Business Media. This book was released on 2007-01-04 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: For this third volume of the series Soil Biology, internationally renowned scientists shed light on the significant roles of microbes in soil. Key topics covered include: bioerosion, humification, mineralization and soil aggregation; Interactions in the mycorrhizosphere; microbes and plant nutrient cycling; Microbes in soil surface or toxic metal polluted soils; Use of marker genes and isotopes in soil microbiology, and many more.
Download or read book Carbon and Nitrogen Distribution and Processes in Forest and Agricultural Ecosystems written by Karl Jay Dria and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Forest and agricultural ecosystems comprise a large portion of the United States. Soil organic matter (SOM) is viewed as the organic source of C and N for plants and microorganisms as well as an important C and N sink in these soils. To obtain a better understanding of C and N cycling in forest and agricultural ecosystems, one needs to understand humification, transformations, the chemistry of the various inputs and the chemical structural changes that these materials are subjected to on their path towards soil formation. For the forest study, a vertical transect of samples was collected from the forest canopy to the subsoil in the Harvard Forest before and after ten years of chronic N fertilization to determine compositional changes caused by ten years of fertilization and assess the effects of N loading. Currently, little is known about carbon structural types, quantity or quality preserved as a result of agricultural management practices. Soil samples and various OM inputs (before and after degradation) were collected from agricultural soils under conventional and organic management practices. Samples from both ecosystems were characterized using elemental analysis, solid-state 13C and 15N NMR, and pyrolysis GC/MS. 13C NMR spectra from all samples contain signals associated with paraffinic, carbohydrate, aromatic and carboxyl structures. NMR spectra of soil inputs are dominated by carbohydrate carbons, while these intensities are severely diminished in the soil. An important observation is that the dominant persistent structures are paraffinic-type carbons in forest and agricultural ecosystems and, to a lesser extent, lignin structures in the agricultural system. However, comparison of the paraffinic signatures of the major OM inputs to the soils suggests that these are not the primary source of persistent paraffinic structures. In the forest system, N fertilization caused an increase in lipid-extractable paraffinic structures in oak leaves, an increase in N content in leaves, and slower litter decomposition in O and A soil horizons under pine and hardwood trees. In the agricultural system, minimal differences were observed between organic and conventionally managed soil, while crop residue lignin-to-nitrogen ratio differences were observed between management practices.
Download or read book Carbon and Nitrogen Dynamics in Flooded Soils written by G. J. D. Kirk and published by Int. Rice Res. Inst.. This book was released on 2000 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Survey Reports written by Iowa Agriculture and Home Economics Experiment Station and published by . This book was released on 1917 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The European Nitrogen Assessment written by Mark A. Sutton and published by Cambridge University Press. This book was released on 2011-04-14 with total page 665 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting the first continental-scale assessment of reactive nitrogen in the environment, this book sets the related environmental problems in context by providing a multidisciplinary introduction to the nitrogen cycle processes. Issues of upscaling from farm plot and city to national and continental scales are addressed in detail with emphasis on opportunities for better management at local to global levels. The five key societal threats posed by reactive nitrogen are assessed, providing a framework for joined-up management of the nitrogen cycle in Europe, including the first cost-benefit analysis for different reactive nitrogen forms and future scenarios. Incorporating comprehensive maps, a handy technical synopsis and a summary for policy makers, this landmark volume is an essential reference for academic researchers across a wide range of disciplines, as well as stakeholders and policy makers. It is also a valuable tool in communicating the key environmental issues and future challenges to the wider public.
