Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Temporal And Cropping System Effects On Labile Soil Carbon And Nitrogen Pools In Long Term Agroecosystems
Download Temporal And Cropping System Effects On Labile Soil Carbon And Nitrogen Pools In Long Term Agroecosystems full books in PDF, epub, and Kindle. Read online Temporal And Cropping System Effects On Labile Soil Carbon And Nitrogen Pools In Long Term Agroecosystems ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Temporal and Cropping System Effects on Labile Soil Carbon and Nitrogen Pools in Long-term Agroecosystems by : Kalyn M. Diederich
Download or read book Temporal and Cropping System Effects on Labile Soil Carbon and Nitrogen Pools in Long-term Agroecosystems written by Kalyn M. Diederich and published by . This book was released on 2017 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Management Effects on Labile Organic Carbon Pools in a Texas Cotton-cropping System by : Scott Michael Kolodziej
Download or read book Management Effects on Labile Organic Carbon Pools in a Texas Cotton-cropping System written by Scott Michael Kolodziej and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: It is well documented that increases in soil organic matter (SOM) improve soil physical properties and increase the overall fertility and sustainability of the soil. Research in SOM storage has recently amplified following the proposal that agricultural soils may provide a significant carbon (C) sink that may aid in the mitigation of increasing atmospheric carbon dioxide. Observed differences in lint yield and nitrogen response from a cotton performance study at the Texas A & M University Experimental Farm near College Station, TX prompted us to examine the effects of tillage and rotation on soil organic C (SOC), soil microbial biomass C (SMBC), 38-day cumulative C mineralization (38-day CMIN), hot-water extractable organic C (hot-WEOC), carbohydrate C, and total glomalin. The treatments examined included conventional-till continuous cotton (CT), reduced-till continuous cotton (RT), and conventional-till cotton after corn rotation (CC) treatments. In pre-plant soil samples, SOC, SMBC, and 38-day CMIN in the top 5 cm were 33, 58, and 79 % greater in RT and 29, 32, and 36 % greater in CC vs. CT. Comparable differences were observed for hot-WEOC and carbohydrate C. Little seasonal variation was observed for labile-C pools throughout the growing season, suggesting minimal C input from cotton roots. Water-stable aggregation was not significantly affected by management, and did not correlate with labile-C pools or total glomalin. Labile-C pools were generally more responsive to management vs. SOC and were strongly correlated with one another. Carbohydrate C of hot-water extracts exhibited the strongest relationships with SMBC and 38-day CMIN, even though it comprised only 3 and 5 % of these pools, respectively. Our data suggest that increasing SOC in Texas cotton-cropping systems through conservation management is possible. Long-term data are still needed to fully address SOC storage potentials in Texas, but increases in labile-C pools resulting from conservation management are attainable and have the potential to positively impact soil fertility.
Book Synopsis Linking Carbon and Nitrogen Cycling to Plant-soil-microbial Interactions at the Field-, Soil Pedon-, and Micro-scales Within Long-term Conventional, Low-input, and Organic Cropping Systems by :
Download or read book Linking Carbon and Nitrogen Cycling to Plant-soil-microbial Interactions at the Field-, Soil Pedon-, and Micro-scales Within Long-term Conventional, Low-input, and Organic Cropping Systems written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite the greatly increased productive capacity of current-day cropping systems, the shortcomings associated with conventional, high-intensity cropping systems and the growing threat of global climate change, warrant the identification of crop management practices that promote long-term agricultural sustainability and productivity. Unlike conventional cropping practices, which include synthetic nitrogen and pesticide use, alternative crop management practices, e.g., cover cropping, tillage reduction, organic amendment additions, and reducing or eliminating synthetic fertilizer use, have emerged as integrated and ecologically sound approaches to enhance agroecosystem functioning and services. Yet, mechanisms governing the differences in soil quality and crop yields among alternative cropping systems and conventional systems remain unclear. The aim of this dissertation study was to understand and quantify the mechanisms governing the relationship between carbon and nitrogen cycling and the interactions between plants, soil, and microorganisms within long-term conventional (annual synthetic fertilizer), low-input (alternating synthetic fertilizer and cover crop additions), and organic (annual manure- and cover crop additions) cropping systems, at the field-, soil pedon-, and micro-scales. A multi-scaled approach, including agronomic experiments, stable isotopes (13C and 15N), soil fractionation techniques, and microbiological analyses (e.g., functional gene quantification and phospholipid fatty acid assays), was employed to study mechanisms of soil carbon and nitrogen stabilization and loss and to draw links between microbial populations and carbon and nitrogen processing across different agroecosystems. Data from this research only partly corroborated the global hypothesis: the effects of long-term, low-input crop management enhance microbial-mediated carbon and nitrogen turnover in different soil microenvironments and optimize the balance between carbon and nitrogen stabilization and loss compared to the conventional and organic cropping systems. Only a weak relationship between short-term microbial community structure and long-term carbon and nitrogen sequestration was found across the three cropping systems. The conclusion drawn is that the effects of long-term crop management are dictated by complex trade-offs between soil carbon and nitrogen stabilization, microbial abundance and activity, nitrogen losses, crop productivity, and the quantity and quality of carbon and nitrogen inputs in alternative cropping systems.
Book Synopsis Soil Management and Climate Change by : Maria Angeles Munoz
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
Book Synopsis Microbial Ecology in Sustainable Agroecosystems by : Tanya E. Cheeke
Download or read book Microbial Ecology in Sustainable Agroecosystems written by Tanya E. Cheeke and published by CRC Press. This book was released on 2012-07-17 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: While soil ecologists continue to be on the forefront of research on biodiversity and ecosystem function, there are few interdisciplinary studies that incorporate ecological knowledge into sustainable land management practices. Conventional, high fossil-fuel input-based agricultural systems can reduce soil biodiversity, alter soil community structu
Book Synopsis Soil Health Analysis, Set by : Douglas L. Karlen
Download or read book Soil Health Analysis, Set written by Douglas L. Karlen and published by John Wiley & Sons. This book was released on 2021-08-13 with total page 527 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 1 briefly reviews selected “Approaches to Soil Health Analysis” including a brief history of the concept, challenges and opportunities, meta-data and assessment, applications to forestry and urban land reclamation, and future soil health monitoring and evaluation approaches. Volume 2 focuses on “Laboratory Methods for Soil Health Analysis” including an overview and suggested analytical approaches intended to provide meaningful, comparable data so that soil health can be used to guide restoration and protection of our global soil resources.
Book Synopsis Soil Management and Greenhouse Effect by : John M. Kimble
Download or read book Soil Management and Greenhouse Effect written by John M. Kimble and published by CRC Press. This book was released on 2018-02-06 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil Management and Greenhouse Effect focuses on proper management of soils and its effects on global change, specifically, the greenhouse effect. It contains up-to-date information on a broad range of important soil management topics, emphasizing the critical role of soil for carbon storage. Sequestration and emission of carbon and other gases are examined in various ecosystems, in both natural and managed environments, to provide a comprehensive overview. This useful reference includes chapters that address policy issues, as well as research and development priorities. The material in this volume is valuable not only to soil scientists but to the entire environmental science community.
Book Synopsis Effect of Cropping Systems on Microbial Biomass Carbon and Nitrogen, Dehydrogenase Activity, and Fixed Ammonium in Soils by : Jennifer Marie Moore
Download or read book Effect of Cropping Systems on Microbial Biomass Carbon and Nitrogen, Dehydrogenase Activity, and Fixed Ammonium in Soils written by Jennifer Marie Moore and published by . This book was released on 1998 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable agriculture, including cropping systems, has received considerable attention in recent years. Soil management practices may affect the physical, chemical, and biological properties of soils, including microbial biomass C (C[subscript mic]), microbial biomass N (N[subscript mic]), enzyme activities, especially dehydrogenase activity, and (possibly) fixed NH4+. In this work, soil samples were collected in 1996 and 1997 from two long-term cropping systems at the Northeast Research Center (NERC) in Nashua and the Clarion-Webster Research Center (CWRC) in Kanawha, Iowa.
Book Synopsis Sustainable Cropping Systems by : Jeffrey A. Coulter
Download or read book Sustainable Cropping Systems written by Jeffrey A. Coulter and published by MDPI. This book was released on 2020-05-21 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global crop production must substantially increase to meet the needs of a rapidly growing population. This is constrained by the availability of nutrients, water, and land. There is also an urgent need to reduce the negative environmental impacts of crop production. Collectively, these issues represent one of the greatest challenges of the twenty-first century. Sustainable cropping systems based on ecological principles are the core of integrated approaches to solve this critical challenge. This special issue provides an international basis for revealing the underlying mechanisms of sustainable cropping systems to drive agronomic innovations. It includes review and original research articles that report novel scientific findings on improvement in cropping systems related to crop yields and their resistance to biotic and abiotic stressors, resource use efficiency, environmental impact, sustainability, and ecosystem services.
Book Synopsis The Effects of Cover Cropping on Labile Nitrogen and Carbon Pools in Soil by : Kavya Krishnan
Download or read book The Effects of Cover Cropping on Labile Nitrogen and Carbon Pools in Soil written by Kavya Krishnan and published by . This book was released on 2017 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Long-term Cropping System and Nitrogen Management Effects on Soil Properties by : Clay A. Robinson
Download or read book Long-term Cropping System and Nitrogen Management Effects on Soil Properties written by Clay A. Robinson and published by . This book was released on 1993 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Soil Carbon and Nitrogen Saturation in Crop-pasture Agricultural Systems by : Maria Pravia Nin
Download or read book Soil Carbon and Nitrogen Saturation in Crop-pasture Agricultural Systems written by Maria Pravia Nin and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrated crop-pasture systems can produce high grain yields without large inputs of external nitrogen (N). The extraction of N in grain and animal products, as well as gaseous, leaching and runoff losses should be offset by N fixation during the pasture phase of the integrated crop-pasture systems. The N would be timely delivered in moments of fast crop growth. The design of systems based on these intrinsic synergies offer a pathway for sustainable intensification of agriculture. In this dissertation, I propose that the carbon (C) and N cycling in crop-pasture rotations can be explained by soil C (Cs) saturation theory, and some degree of de-coupling of the C and N cycling. To this end, I developed hypotheses that integrate the concepts of C and N saturation. I tested these hypotheses by combing agroecosystem simulation models and soil incubations using stable isotopes tracing techniques. The systems modeled and the soils for incubations were obtained from long-term crop-pasture rotation experiments at the Instituto Nacional de Investigacin Agropecuaria (INIA), Uruguay. Rotation systems that included perennial species showed greater N mineralization and immobilization when simulated with the Cycles agroecosystem model. Soil C stocks evolution and subsoil Cs distribution were more accurately simulated when the model included an algorithm for Cs saturation than when excluding it, indicating that this mechanism can explain Cs cycling. Soil sampling showed greater Cs saturation levels on the topsoil of systems including perennial species. The incubation of soils with residues enriched in 13C and 15N showed that Cs decomposition increased as Cs saturation increased, and Cs humification and N retention decreased. This accelerated turnover with increased Cs saturation underpins N supply in crop-pasture systems. Despite the link observed between Cs and N saturation mechanisms, some degree of decoupling was revealed by a decreasing C:N ratio of the retained or newly formed organic matter as Cs saturation increased. This lowering of the C:N ratio indicates higher N than C retention, buffering N losses in relatively Cs saturated soils. Overall, this dissertation supports soil C saturation theory and the implied reduction in the retention of C and acceleration of turnover as saturation increases, and suggests that C saturation is a fundamental pillar of the integrated crop-pasture systems function and sustainability.
Book Synopsis Effect of Long-term Cropping Systems on Organic Matter and Nitrogen Contents, Aggregation, Bulk Density and Water-holding Capacity of Soil by : Pir Muhammad Azizi
Download or read book Effect of Long-term Cropping Systems on Organic Matter and Nitrogen Contents, Aggregation, Bulk Density and Water-holding Capacity of Soil written by Pir Muhammad Azizi and published by . This book was released on 1972 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Stephen R. Bowley Publisher :Guelph, Ont. : Any Old Subject Books ISBN 13 :9780968550014 Total Pages :250 pages Book Rating :4.5/5 (5 download)
Book Synopsis A Hitchhiker's Guide to Statistics in Plant Biology by : Stephen R. Bowley
Download or read book A Hitchhiker's Guide to Statistics in Plant Biology written by Stephen R. Bowley and published by Guelph, Ont. : Any Old Subject Books. This book was released on 1999-01-01 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Role of Aggregate Dynamics in the Relationship Between Carbon Stabilization and Carbon Input Within Agroecosystems by : Angela Yin Yee Kong
Download or read book The Role of Aggregate Dynamics in the Relationship Between Carbon Stabilization and Carbon Input Within Agroecosystems written by Angela Yin Yee Kong and published by . This book was released on 2005 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Carbon, Nitrogen and Aggregation Dynamics in Low-input and Reduced Tillage Cropping Systems by : Diana Beth Friedman
Download or read book Carbon, Nitrogen and Aggregation Dynamics in Low-input and Reduced Tillage Cropping Systems written by Diana Beth Friedman and published by . This book was released on 1993 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Australian Journal of Soil Research by :
Download or read book Australian Journal of Soil Research written by and published by . This book was released on 2007 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
