Download or read book Rapid Changes in Soil Microbial Biomass and Carbon and Nitrogen Pools in Response to Agricultural Practices written by Erica Joan Lundquist and published by . This book was released on 1997 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soil Nitrogen Transformations in Response to Farming Practices and the Presence of Roots written by Martin Burger and published by . This book was released on 2002 with total page 270 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 Soil Carbon Dynamics written by Werner L. Kutsch and published by Cambridge University Press. This book was released on 2010-01-07 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Techniques in Microbial Ecology written by Robert S. Burlage and published by . This book was released on 1998 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microbial ecology is one of the fastest growing fields of microbiology. This practical volume is the bench and field scientist's guide to well-established techniques for investigating microbial communities. Both for biologists just entering the field and for experienced researchers wishingto explore new areas, this book provides the theoretical background, detailed protocols, and tips from experts for working in this field. Chapters on bacteria with interesting metabolic traits are augmented with chapters on molecular techniques, lipid analysis, and appropriate sampling techniques.The final section includes up-to-date information on biofilm development and study, the science and practice of bioremediation, modeling of biological systems (including the most useful statistical parameters), and the study of phylogenetics.

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 Soil Microbial Community Dynamics in Response to Cover Crop Implementation and P Fertilizer Management written by Catherine Louise Stewart and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil microorganisms facilitate nutrient cycling within soils providing a critical component of soil health and serve a key role in maintaining productive agricultural systems. There are many ways to assess soil health and how soil systems respond to agricultural management practices. Some of these methods target either recalcitrant or labile nutrient pools within soils, while others focus on the microorganisms themselves. This study sought to examine a variety of different assays targeting components of soil health and how they were impacted by agricultural management practices. Objectives of this study were to (i) examine carbon (C) and nitrogen (N) soil health metrics; (ii) to explore the microbial community structure using phospholipid fatty acid analysis, and (iii) to identify key microbial functional gene composition, and soil health metrics relate to key soil microbial functional gene composition in the fall 2019 and spring 2020 seasons in response to management practices that include cover crop usage and P fertilizer treatments at an early transition to no-tillage (less than 5 years) site at the Kansas Agricultural Watershed Field Research Facility. Objective one examined soil samples from the spring and fall of 2018 and 2019 at the 0-5 cm soil depth. Objective two examined soil samples from the spring and fall of 2018 and 2019 at the 0-5, 5-10, and 10-15 cm depths. Objective three examined soil samples from fall 2019 and spring 2020 at the 0-5 cm depth. The experiment has a 2 by 3 factorial treatment structure with two levels of cover crop treatments: with cover crops (CC) and without cover crops (NC) and three levels of P fertilizer managements: no P fertilizer (NP), fall broadcast (FB), and spring injected (SI) in a randomized complete block design with three replicates of each treatment combination. When assessing traditional soil health assays, I found assays that targeted soil C nutrient pools were more consistently able to detect differences with the cover crop implementation as compared to those that examined N pools. Assays using total C, microbial biomass C, active C, dissolved organic C, and enzyme activity were more successful in detecting cover crop implementation as compared to assays that targeted N pools including total N, microbial biomass N, dissolved organic N, and inorganic N. For the second objective I found that PLFA microbial biomass decreases with increasing depth, and that cover crops can significantly increase microbial biomass in several PLFA categories when compared to plots with no cover crop in a no-tillage system with a corn-soybean rotation. The microbial community composition was found to be similar between the CC and NC treatments at the 0-5 cm depth. Bacteria and fungi were not impacted by treatments. The third objective found that genes related to microorganismal nutrient dynamics responded differently based on seasonality with fall samples being more frequently responsive to treatment differences than spring samples. This objective found the greatest gene abundance in the NP*CC treatment in fall within the examined sub-categories of microorganism functional genes.

Download or read book Ecology Environmental Science Conservation written by Singh J.S., Singh S.P. & Gupta S.R. and published by S. Chand Publishing. This book was released on 2014 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the years, the scope of our scientific understanding and technical skills in ecology and environmental science have widened significantly, with increasingly greater emphasis on societal issues. In this book, an attempt has been made to give basic concepts of ecology, environmental science and various aspects of natural resource conservation. The topics covered primarily deal with environmental factors affecting organisms, adaptations, biogeography, ecology of species populations and species interactions, biotic communities and ecosystems, environmental pollution, stresses caused by toxics, global environmental change, exotic species invasion, conservation of biodiversity, ecological restoration, impact assessment, application of remote sensing and geographical information system for analysis and management of natural resources, and approaches of ecological economics. The main issues have been discussed within the framework of sustainability, considering humans as part of ecosystems, and recognising that sustainable development requires integration of ecology with social sciences for policy formulation and implementation.

Download or read book Soil Carbon Stabilization to Mitigate Climate Change written by Rahul Datta and published by Springer Nature. This book was released on 2021-08-25 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon stabilization involves to capturing carbon from the atmosphere and fix it in the forms soil organic carbon stock for a long period of time, it will be present to escape as a greenhouse gas in the form of carbon dioxide. Soil carbon storage is an important ecosystem service, resulting from interactions of several ecological processes. This process is primarily mediated by plants through photosynthesis, with carbon stored in the form of soil organic carbon. Soil carbon levels have reduced over decades of conversion of pristine ecosystems into agriculture landscape, which now offers the opportunity to store carbon from air into the soil. Carbon stabilization into the agricultural soils is a novel approach of research and offers promising reduction in the atmospheric carbon dioxide levels. This book brings together all aspects of soil carbon sequestration and stabilization, with a special focus on diversity of microorganisms and management practices of soil in agricultural systems. It discusses the role of ecosystem functioning, recent and future prospects, soil microbial ecological studies, rhizosphere microflora, and organic matter in soil carbon stabilization. It also explores carbon transformation in soil, biological management and its genetics, microbial transformation of soil carbon, plant growth promoting rhizobacteria (PGPRs), and their role in sustainable agriculture. The book offers a spectrum of ideas of new technological inventions and fundamentals of soil sustainability. It will be suitable for teachers, researchers, and policymakers, undergraduate and graduate students of soil science, soil microbiology, agronomy, ecology, and environmental sciences

Download or read book Conservation Agriculture in India written by A.R. Sharma and published by Taylor & Francis. This book was released on 2022-09-20 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines the current situation, levels of adoption, management practices, and the future outlook of conservation agriculture in India, and also in other tropical and subtropical regions of the world. While conservation agriculture is proposed as an important means to combat climate change, improve crop productivity and food affordability, and to protect the environment, the adoption of conservation agriculture in India, and south-east Asia more broadly, has been slow. This volume reflects on the current status of conservation agriculture in India, asking why adoption has been slow and putting forward strategies to improve its uptake. The chapters cover the various aspects of crop management such as soil, water, nutrients, weeds, crop residues, machinery, and energy, in a range of environments, including irrigated and rainfed regions. The impact of climate change and the economic considerations behind the adoption of conservation agriculture are also discussed. The volume concludes by discussing the future outlook for conservation agriculture in India, in particular drawing out parallels with other tropical and subtropical regions of the world. This book will be of great interest to students and scholars of conservation agriculture, sustainable agriculture, crop and soil management, and environmental and natural resource management.

Download or read book Carbon mediated Ecological and Physiological Controls on Nitrogen Cycling Across Agricultural Landscapes written by Andrew James Curtright and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The sustainable intensification of agriculture relies on the efficient use of ecosystem services, particularly those provided by the microbial community. Managing for these ecosystem services can improve plant yields and reduce off-site impacts. For instance, increasing plant diversity is linked to positive effects on yield, and these beneficial effects are often mediated by the microbial community and the nutrient transformations it carries out. My dissertation has aimed to elucidate the mechanisms by which plant diversity improves agricultural production. In particular, I have focused on how changes to the amount and diversity of carbon (C) inputs affects soil microorganisms involved in the nitrogen (N) cycle. My work spans multiple scales of observation: from a global meta-analysis to mechanistic studies utilizing denitrification as a model system.In a global meta-analysis, I found that increasing plant diversity through intercropping yields a net increase in extracellular enzyme activity. This effect varied by plant species and soil type suggesting that increases in the quality of nutrient inputs mediates these positive effects on microbial activity. Then, I looked at how intercropping cover crops into corn affects soil nutrient pools and microbial activities in a field experiment. No effect of interseeding cover crops into corn was found on soil nutrient pools or microbial activities. However, by analyzing differences in relationships between nutrient pools and microbial activities at two locations throughout Michigan, I was able to describe how the availability of dissolved organic C (DOC) drives differences in microbial N-cycling processes. I then investigated how C availability drives activity in microbial hotspots within the soil by comparing differences in denitrification potential in bulk soil versus the rhizospheres of corn and interseeded cover crops. Here, I found that denitrification rates were increased in the rhizospheres of all plant types, and this effect varied depending on the species of plant. I was able to further differentiate the impact of DOC and microbial biomass C on the rhizosphere effect and found that C availability was the primary driver of differences in denitrification rates between rhizospheres. Since plants provide many different forms of C to soil microbes, it is important to understand how the chemistry of C inputs affects microbial activity. I used a series of C-substrate additions to determine how C chemistry affects denitrifiers. I found that amino acids and organic acids tended to stimulate the most nitrous oxide (N2O) production and reduction. Although management and site affected overall rates of denitrification, C-utilization patterns of microbes were mostly similar between locations. To identify the mechanisms responsible for these effects, I performed a final experiment to track how denitrifiers utilized different C compounds. The C substrates that stimulated the most complete reduce of N2O also were utilized with the lowest C-use efficiency (CUE). This suggests possible trade-offs between N2O reduction and CUE, with important implications for how to manage microbial communities.Overall, my work demonstrates that land management can impact microbial community activity by influencing the identity of soil C inputs. While the importance of increasing soil C inputs has been known, this dissertation supports the notion that the chemical identity of C inputs can exert significant controls on microbial activity. Moreover, by comparing microbial traits I highlight the importance of trade-offs in how microbially mediated C- and N cycling are coupled.

Download or read book Fate of Carbon in California Rice Systems written by Glenn James Fitzgerald and published by . This book was released on 1998 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soil Microbial Responses to Different Precipitation Regimes Across a Southwestern United States Elevation Gradient written by Brittney Monus and published by . This book was released on 2019 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil organic carbon (SOC) is a critical component of the global carbon (C) cycle, accounting for more C than the biotic and atmospheric pools combined. Microbes play an important role in soil C cycling, with abiotic conditions such as soil moisture and temperature governing microbial activity and subsequent soil C processes. Predictions for future climate include warmer temperatures and altered precipitation regimes, suggesting impacts on future soil C cycling. However, it is uncertain how soil microbial communities and subsequent soil organic carbon pools will respond to these changes, particularly in dryland ecosystems. A knowledge gap exists in soil microbial community responses to short- versus long-term precipitation alteration in dryland systems. Assessing soil C cycle processes and microbial community responses under current and altered precipitation patterns will aid in understanding how C pools and cycling might be altered by climate change. This study investigates how soil microbial communities are influenced by established climate regimes and extreme changes in short-term precipitation patterns across a 1000 m elevation gradient in northern Arizona, where precipitation increases with elevation. Precipitation was manipulated (50% addition and 50% exclusion of ambient rainfall) for two summer rainy seasons at five sites across the elevation gradient. In situ and ex situ soil CO2 flux, microbial biomass C, extracellular enzyme activity, and SOC were measured in precipitation treatments in all sites. Soil CO2 flux, microbial biomass C, extracellular enzyme activity, and SOC were highest at the three highest elevation sites compared to the two lowest elevation sites. Within sites, precipitation treatments did not change microbial biomass C, extracellular enzyme activity, and SOC. Soil CO2 flux was greater under precipitation addition treatments than exclusion treatments at both the highest elevation site and second lowest elevation site. Ex situ respiration differed among the precipitation treatments only at the lowest elevation site, where respiration was enhanced in the precipitation addition plots. These results suggest soil C cycling will respond to long-term changes in precipitation, but pools and fluxes of carbon will likely show site-specific sensitivities to short-term precipitation patterns that are also expected with climate change.

Download or read book Getting down to the mechanism of biochar effects on the functioning of plant soil systems written by Xi-En Long and published by Frontiers Media SA. This book was released on 2023-12-19 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Emerging Frontiers of Microbial Functions in Sustainable Agriculture written by Manoj Kumar Solanki and published by Frontiers Media SA. This book was released on 2023-02-15 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microbiology for Cleaner Production and Environmental Sustainability written by Naga Raju Maddela and published by CRC Press. This book was released on 2023-08-15 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: Growth of populations, increasing urbanization, and rising standards of living due to technological innovations demand not only the meticulous use of shrinking resources but also sustainable ways of producing materials for human welfare. Cleaner production involves preventive and protective initiatives which are intended to minimize waste and emissions and maximize product output. These novel microbiological techniques are a practical option for achieving environmental sustainability. Microbiology for Cleaner Production and Environmental Sustainability serves as a valuable source of information about microbiological advancements for a sustainability in diversified areas such as energy resources, food industries, agricultural production, and environmental remediation of pollution. Features: Covers key issues on the role of microbiology in the low-cost production of bioenergy Provides comprehensive information on microorganisms for maximizing productivity in agriculture Examines green pharmaceutical production Provides the latest research on microbiological advancements in the restoration of contaminated sites

Download or read book Managing Soil Quality written by P. Schjønning and published by CABI. This book was released on 2004 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: In-depth treatments of the soil quality concept, its history, and its applicability in research and in developed and developing societiesAll 18 chapters are written by well-established experts from Europe, North America and AustraliaSoil quality is a concept that allows soil functions to be related to specific purposes. Managing soil quality takes a management oriented approach by identifying key issues in soil quality and management options to enhance the sustainability of modern agriculture. Topics covered include major plant nutrients (N, P, K), soil acidity, soil organic matter, soil biodiversity, soil compaction, erosion, pesticides and urban waste.