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Phosphorus Management In The Agroecosystem
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Book Synopsis Phosphorus in Agriculture: 100 % Zero by : Ewald Schnug
Download or read book Phosphorus in Agriculture: 100 % Zero written by Ewald Schnug and published by Springer. This book was released on 2016-06-14 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: The title ‘Phosphorus in Agriculture: 100 % Zero’ is synonymous for make-or-break. And it stands up to the promise. This book sends an important message as it delivers background information, intrinsic hypotheses, validation approaches and legal frameworks, all for balanced phosphorus fertilization in agriculture. This implies firstly that the phosphorus requirement of crop is fully satisfied by applying exclusively fertilizers which contain the nutrient in completely available form. Secondly, environmental demands through eutrophication and hazardous contaminants must not be compromised. The book identifies equally knowledge gaps and deficits in the transformation and implementation of research into practice. Bottom line is that research delivers the tools for a sustainable phosphorus management while legal frameworks are insufficient.
Book Synopsis Phosphorus Management in the Agroecosystem by : Joshua David Ferry
Download or read book Phosphorus Management in the Agroecosystem written by Joshua David Ferry and published by . This book was released on 2011 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Increasing evidence of phosphorus (P) contamination of surface water has precipitated numerous research efforts, both in government agencies and at academic institutions. These efforts have been overwhelmingly committed to characterizing this problem from a biophysical perspective, through fields such as limnology, aquatic ecology, soil science and agronomy---and have yielded great results. In many watersheds, particularly in the Eastern Cornbelt, phosphorus loading comes largely from row-crop agriculture. As a non-point source, phosphorus transport from individual agricultural operations cannot be directly monitored or regulated. Consequently, it behooves those interested in improving water quality to couple biophysical research with research devoted to understanding what social variables are animating the land management decisions ultimately responsible for contamination. Given this need, the objectives of this research were twofold. The first objective of this research was to characterize the current phosphorus risk assessment information available to farmers, in light of the emerging problem of soluble P. The second objective was to assess farmers' understanding of phosphorus management, which includes transport, fate and the risks associated with nutrient loss. Twenty-three farmers participated in in-depth interviews where they were asked questions pertaining to phosphorus management. Results were then coded and mapped onto the expert influence diagram illustrating key knowledge strengths and weaknesses. Individual farmers were assigned a knowledge score based on concept recognition. Knowledge scores were then correlated to self-reported risk perception measures. The results indicate that farmers are thoroughly versed in the transport of P via direct soil loss, but have a much lower understanding of the transport of soluble P via surface runoff. Overall, risk perception is positively correlated to knowledge with risk perception levels relatively high. The risk perception results suggest that farmers are well positioned to receive and process a risk communication effort designed to address knowledge deficiencies specific to soluble P mitigation behavior.
Book Synopsis Resources Use Efficiency in Agriculture by : Sandeep Kumar
Download or read book Resources Use Efficiency in Agriculture written by Sandeep Kumar and published by Springer Nature. This book was released on 2020-09-18 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt: Achieving zero hunger and food security is a top priority in the United Nations Development Goals (UNDGs). In an era characterized by high population growth and increasing pressure on agricultural systems, efficiency in the use of natural resources has become central to sustainable agricultural practices. Fundamentally speaking, eco-efficiency is about maximizing agricultural outputs, in terms of quantity and quality, using less land, water, nutrients, energy, labor, or capital. The concept of eco-efficiency involves both the ecological and economic aspects of sustainable agriculture. It is therefore essential to understand the interaction of ecosystem constituents within the extensive agricultural landscape, as well as farmers’ economic needs. This book examines the latest eco-efficient practices used in agro-systems. Drawing upon research and examples from around the world, it offers an up-to-date overview, together with insights into directly applicable approaches for poly-cropping systems and landscape-scale management to improve the stability of agricultural production systems, helping achieve food security. The book will be of interest to educators, researchers, climate change scientists, capacity builders and policymakers alike. It can also be used as additional reading material for undergraduate and graduate courses on agriculture, forestry, soil science, and the environmental sciences.
Book Synopsis Phosphorus Management in Crop Production by : Nand Kumar Fageria
Download or read book Phosphorus Management in Crop Production written by Nand Kumar Fageria and published by CRC Press. This book was released on 2017-02-17 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: The world population is projected to reach nine billion by 2050, and in the coming years, global food demand is expected to increase by 50% or more. Higher crop productivity gains in the future will have to be achieved in developing countries through better natural resources management and crop improvement. After nitrogen, phosphorus (P) has more widespread influence on both natural and agricultural ecosystems than any other essential plant element. It has been estimated that 5.7 billion hectares of land worldwide contain insufficient amounts of available P for sustainable crop production, and P deficiency in crop plants is a widespread problem in various parts of the world. However, it has been estimated that worldwide minable P could last less than 40 years. For sustaining future food supplies, it is vital to enhance plant P use efficiency. To bring the latest knowledge and research advances in efficient management of P for economically viable and environmentally beneficial crop production in sustainable agriculture, Phosphorus Management in Crop Production contains chapters covering functions and diagnostic techniques for P requirements in crop plants, P use efficiency and interactions with other nutrients in crop plants, management of P for optimal crop production and environmental quality, and basic principles and methodology regarding P nutrition in crop plants. The majority of research data included are derived from many years of field, greenhouse, and lab work, hence the information is practical in nature and will have a significant impact on efficient management of P-fertilizers to enhance P use efficiency, improve crop production, promote sustainable agriculture, and reduce P losses through eluviations, leaching, and erosion to minimize environmental degradation. A comprehensive book that combines practical and applied information, Phosphorus Management in Crop Production is an excellent reference for students, professors, agricultural research scientists, food scientists, agricultural extension specialists, private consultants, fertilizer companies, and government agencies that deal with agricultural and environmental issues.
Book Synopsis Sustainable Phosphorus Management by : Roland W. Scholz
Download or read book Sustainable Phosphorus Management written by Roland W. Scholz and published by Springer Science & Business Media. This book was released on 2014-03-12 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes a pathway for sustainable phosphorus management via the Global Transdisciplinary Processes for Sustainable Phosphorus Management project (Global TraPs). Global TraPs is a multi-stakeholder forum in which scientists from a variety of disciplines join with key actors in practice to jointly identify critical questions and to articulate what new knowledge, technologies and policy processes are needed to ensure that future phosphorus use is sustainable, improves food security and environmental quality and provides benefits for the poor. The book offers insight into economic scarcity and identifies options to improve efficiency and reduce environmental impacts of anthropogenic phosphorus flows at all stages of the supply and use chain.
Book Synopsis Legacy Phosphorus in Agriculture: Role of Past Management and Perspectives for the Future by : Luke Gatiboni
Download or read book Legacy Phosphorus in Agriculture: Role of Past Management and Perspectives for the Future written by Luke Gatiboni and published by Frontiers Media SA. This book was released on 2021-01-07 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Phosphorus written by Rattan Lal and published by CRC Press. This book was released on 2016-09-19 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phosphorus is an essential plant nutrient, but global population growth has dramatically reduced the availability of phosphorus fertilizer resources. Despite this scarcity, there remain numerous problems associated with the excessive and inappropriate use of phosphorus leading to non-point source pollution and eutrophication of natural waters. Identifying appropriate systems for managing soil phosphorus and reducing the risks of eutrophication are needed to minimize the environmental risks. This book focuses on the availability and recycling of phosphorus; regulatory and policy issues of sustainable phosphorus use; and water quality management in agroecosystems pertaining to phosphorus. Sections are dedicated to global phosphorus reserves; cycling and pathways of phosphorus; phosphorus in agriculture; human dimensions and policy intervention; and research and development priorities. Phosphorus is a finite but crucial resource and is an essential element to all life. Sub-optimal availability and nutrient imbalance in the root zone can adversely impact plant growth, and the quality of food and feed grown on these soils. However, the proven reserves of phosphorus can hardly be adequate for a few centuries only. Yet, its misuse and mismanagement has caused severe problems of eutrophication of water and pollution of the environment. Thus, judicious management of soil phosphorus is essential. This volume is specifically devoted to availability and recycling of phosphorus, regulatory/policy issues of sustainable use of phosphorus, and management in agroecosystems in the context of maximizing the use efficiency and minimizing the environmental risks of water quality.
Book Synopsis Soil Fertility Management in Agroecosystems by : Amitava Chatterjee
Download or read book Soil Fertility Management in Agroecosystems written by Amitava Chatterjee and published by John Wiley & Sons. This book was released on 2020-05-19 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Soil Fertility Management in Agroecosystems, Editors Amitava Chatterjee and David Clay provide a thoughtful survey of important concepts in soil fertility management. For the requirements of our future workforce, it is imperative that we evolve our understanding of soil fertility. Agronomists and soil scientists are increasingly challenged by extreme climatic conditions. Farmers are experimenting with integrating cover crops into rotations and reducing the use of chemical fertilizers. In other words, there is no such a thing as a simple fertilizer recommendation in today's agriculture. Topics covered include crop-specific nutrient management, program assessment, crop models for decision making, optimization of fertilizer use, cover crops, reducing nitrous oxide emissions, natural abundance techniques, tile-drained conditions, and soil biological fertility.
Book Synopsis Special Issue: Integrating Approaches to Sustainable Phosphorus Management in Agroecosystems by : Thomas Nesme
Download or read book Special Issue: Integrating Approaches to Sustainable Phosphorus Management in Agroecosystems written by Thomas Nesme and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Maize Agroecosystem by : K. R. Krishna
Download or read book Maize Agroecosystem written by K. R. Krishna and published by CRC Press. This book was released on 2012-07-19 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: Maize is among the most widely spread and widely used crops of the world, used for cereals for over 4 billion humans, as food for farm animals, and as a source material for biofuel production. Yet there are relatively few books on the cropping system of this important crop. This book, Maize Agroecosystem, is a concise treatise dealing with agronomy, soil fertility, and productivity of maize. The information is global in nature and considers recent developments in all maize cropping belts. The "global maize agroecosystem" is a conglomerate of several "maize cropping belts" that flourish on different continents. The impact of nutrient management on the productivity of maize agroecosystems is the main focus of this book. The book includes the history of maize growing, the kinds of soil needed, nutrient dynamics, the use of soil organic matter, the physiology and genetics of maize, and integrated nutrient management. It presents comprehensive knowledge regarding the physicochemical dynamics of the three major nutrients: nitrogen, phosphorus, and potassium. Also covered is how fertilizers impinge on soils of maize farms and their impact on soil and groundwater quality. The impact of crop genotype on soil nutrient dynamics and productivity is also highlighted. The information provided here will be highly useful to students at colleges and universities in the fields of agricultural sciences and environmental science and ecology, and the book also functions as valuable resource for researchers and professors in crop science. Several figures and tables are included that describe and summarize the impact of various agronomic/fertilizer management procedures on crop productivity.
Book Synopsis Use of Phosphorus Isotopes for Improving Phosphorus Management in Agricultural Systems by : International Atomic Energy Agency
Download or read book Use of Phosphorus Isotopes for Improving Phosphorus Management in Agricultural Systems written by International Atomic Energy Agency and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication provides comprehensive and up to date information on several topics related to phosphorus in soil-plant systems, in agricultural systems and in the environment.
Book Synopsis The Role of Phosphorus in Agriculture by : F. E. Khasawneh
Download or read book The Role of Phosphorus in Agriculture written by F. E. Khasawneh and published by . This book was released on 1980 with total page 940 pages. Available in PDF, EPUB and Kindle. Book excerpt: World phosphate reserves and resources; The phosphate industry of the United States; Evaluation of phosphatic raw materials; Phosphate raw materials and fertilizers: part I - a look ahead; Phosphate raw materials and fertilizers: part II - a case history of marginal raw materials; Sulfur requirements of the phosphate fertilizer industry; Phosphoric acid technology; Phosphate fertilizers and process technology; World phosphate fertilizer supply-demand outlook; Energy requirements for the production of phosphate fertilizers; Energy of phosphate fertilizer applications and food energy returns; Reactions of phosphate fertilizers in soils; Agronomic effectiveness of phosphate fertilizers; Evaluation and utilization of residual phosphorus in soils; Use and limitations of physical-chemical criteria for assessing the status of phosphorus in soils; Assessing organic phosphorus in soils; Conventional soil and tissue tests for assessing the phosphorus status of soils; Management considerations for acid; Use of waste materials as sources of phosphorus; Agricultural phosphorus in the environment; Phosphate nutrition of plants - a general treatise; Soil-plant interactions in the phosphorus nutrition of plants; Role of rhizosphere microorganisms in phosphorus uptake by plants; Interactions of phosphorus with other elements in soils and in plants; Phosphate nutrition of corn, sorghum, soybeans, and small grains; Phosphorus nutrition of cotton, peanuts, rice, sugarcane, and tobacco; Phosphorus nutrition of vegetable crops and sugar beets; Phosphorus nutrition and fertilization of forest trees; Phosphorus nutrition of forages; Relationship between phosphorus nutrition of plants and the phosphorus nutrition of animals and man.
Book Synopsis Principles of Sustainable Soil Management in Agroecosystems by : Rattan Lal
Download or read book Principles of Sustainable Soil Management in Agroecosystems written by Rattan Lal and published by CRC Press. This book was released on 2013-06-10 with total page 571 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the laws of sustainable soil management to enhance ecosystem services while restoring degraded soils and promoting sustainable use. With chapters contributed by world-class soil scientists, ecologists, and social scientists, the book outlines critical changes in management of agricultural soils necessary to address global issues of food security, climate change, water security, and energy needs. Topics covered include organic farming, soil fertility, crop-symbiotic soil microbiota, human-driven soil degradation, soil degradation and restoration, carbon sink capacity of soils, and soil renewal and sustainability.
Book Synopsis Phosphorus Dynamics in a Changing Agroecosystem Landscape by : Curt McConnell
Download or read book Phosphorus Dynamics in a Changing Agroecosystem Landscape written by Curt McConnell and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The availability of soil phosphorus (P) for plants changes as soil develops, limiting plant growth in early successional stages as P slowly releases from parent material and doing so again in late soil weathering stages as the little remaining P in system is slowly fixed by the soil matrix. Managing P deficiencies in many agricultural systems requires using P fertilizers, as grain and hay harvest export nutrients from the soil-plant systems. However, in the post-Green Revolution world, P excesses from over-fertilization are ubiquitous. Phosphorus removed with grain from one region is sometimes redeposited as manure in a different region, which gradually increases the soil P content and that which is lost from hydrologic transport. Agricultural P pollution is the principal driver of aquatic ecosystem eutrophication; optimizing on farm soil P levels is therefore essential to sustainable food and fuel production. Sustainable production systems are ever-more reliant on precision technology, predicated on analytical procedures that require a strong theoretical framework of the biogeochemical P cycle. Knowing when and where P will be in excess or deficient and how it cycles in varying soils and conditions are integral steps to building the most reliable nutrient models and decision support tools. Gaps in the understanding of P are reflected in poor model conceptualizations and in uncertainties of model results. Research efforts in this work towards filling these gaps (Chapter 2) include increasing the resolution of vertical P distribution measurements (Chapter 3), exploring the controls on the microbial cycling of P using oxygen-18 tracers (Chapter 4), and applying models to test new production systems that will ultimately shape the P cycle (Chapter 5). One example of a gap in understanding soil P dynamics was the failure to predict increased soluble P losses from no-till agricultural systems, despite long knowing the practice stratifies P at the surface. Prior to this research, measurements of stratification were taken in 5-10 cm increments, which may obscure the distribution of P at the surface extremes and thereby underestimate surface P loss potential. I designed a new sampling tool was designed to extract thin cross sections of the surface soil in 1-cm increments. It revealed that most nutrients are more stratified within the top 5-cm, a pattern typically obscured by routine sampling. Understanding the cycling of P has also been slowed by the absence of stable isotope P tracers. To overcome this limitation, using oxygen-18 to trace P dynamics has gained traction over the past decade. As microbes process phosphate labeled with oxygen-18 (18OPO4), the oxygen in the phosphate molecule reaches isotopic equilibrium with soil water; thus, the extent of the microbial P cycling can be tracked by following the oxygen-18 in phosphates. However, based on the research reviewed and conducted in this dissertation to test whether P saturation and P content affected microbial P use, there was no measured equilibration of 18OPO4. This points to either slower turnover of soil P than previously thought, a portion of the Mehlich-3 pool untapped by microbes, a lack of measurement sensitivity, or issues with divergent equilibration depending on the methods of 18O tracer introduction. These limitations have only been vaguely addressed in the literature before. Clarifying such limitations is a necessary step to improving the use of oxygen-18 as a P tracer, our understanding of P biogeochemical cycling, and ultimately the representation of P cycling in models. Systems modeling can represent complex, large scale processes without in-field experimentation that become unfeasible at the scope of watersheds. P losses from erosion, runoff, and through tile drains in agricultural systems are a significant contributor to P pollution. Planting cover crops is an effective means of controlling nutrient losses, but the earlier onset of winter in northern latitudes can hamper establishment of cover crops planted after the cash crop. Interseeding cover crops between the rows of growing cash crops can help improve cover crop establishment and provide ecosystem services. I used the Cycles model to simulate overall crop yields, interspecific competition, and nutrient losses and to determine at what latitude the tradeoffs of interseeding could be minimalized. The model showed this to be around latitude 41°N, where the benefits of interseeding outweigh the potential corn yield drag. The constant feedback between model performance and experimental results is what improves our understanding biogeochemical P cycling in agroecosystems. Knowing how P is distributed, how it is cycled, and how the surrounding landscape is changing due to aggressive human alteration of the P cycle globally, regionally, and within soil profiles, will enable better modeling and implementation of sustainable management practices.
Book Synopsis Phosphorus in the Global Environment by : Holm Tiessen
Download or read book Phosphorus in the Global Environment written by Holm Tiessen and published by . This book was released on 1995-12-05 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: However, the controls on phosphorus transfers through landscapes are complex, and an integrated approach by terrestrial and aquatic scientists is needed to develop such an understanding. The use of waterbodies as sensitive and fragile indicators of phosphorus losses from surrounding watersheds is an important step towards a comprehensive scientific approach.
Book Synopsis Enhancing Agroecosystem Phosphorus Management by : Rebecca Kay McGrail
Download or read book Enhancing Agroecosystem Phosphorus Management written by Rebecca Kay McGrail and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Properties and Management of Soils in the Tropics by : Pedro A. Sanchez
Download or read book Properties and Management of Soils in the Tropics written by Pedro A. Sanchez and published by Cambridge University Press. This book was released on 2019-01-10 with total page 685 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-awaited second edition of classic textbook, brought completely up to date, for courses on tropical soils, and reference for scientists and professionals.
