Download or read book Patterns of Soil Phosphorus written by Elena Michele Bennett and published by . This book was released on 2002 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nutrient Cycling in Terrestrial Ecosystems written by Petra Marschner and published by Springer Science & Business Media. This book was released on 2007-05-01 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive overview of nutrient cycling processes and their importance for plant growth and ecosystem sustainability. The book combines fundamental scientific studies and devised practical approaches. It contains contributions of leading international authorities from various disciplines resulting in multidisciplinary approaches, and all chapters have been carefully reviewed. This volume will support scientists and practitioners alike.
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 Chemical Processes in Soils written by M. A. Tabatabai and published by . This book was released on 2005 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Standard Soil Methods for Long Term Ecological Research written by G. Philip Robertson and published by Oxford University Press. This book was released on 1999-10-28 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: Standardized methods and measurements are crucial for ecological research, particularly in long-term ecological studies where the projects are by nature collaborative and where it can be difficult to distinguish signs of environmental change from the effects of differing methodologies. This second volume in the Long-Term Ecological Research (LTER) Network Series addresses these issues directly by providing a comprehensive standardized set of protocols for measuring soil properties. The goal of the volume is to facilitate cross-site synthesis and evaluation of ecosystem processes. Chapters cover methods for studying physical and chemical properties of soils, soil biological properties, and soil organisms, and they include work from many leaders in the field. The book is the first broadly based compendium of standardized soil measurement methods and will be an invaluable resource for ecologists, agronomists, and soil scientists.
Download or read book Controls on catchment scale patterns of phosphorus in soil streambed sediment and stream water written by M. Van der Perk and published by . This book was released on 2007 with total page 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 359 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.
Download or read book Organic Phosphorus in the Environment written by Benjamin L. Turner and published by Cabi. This book was released on 2005 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phosphorus is essential for life, yet is often the element most limiting for biological productivity. Although most organisms take up phosphorus in an inorganic form, organic forms frequently dominate in soils and aquatic systems. Up to this point, the role of organic phosphorus and mechanisms for its dynamics have been poorly understood. However, recent advances in research have shed new light on the subject and this book brings together these advances. It covers the transformation and characterization of organic phosphorus in both terrestrial and aquatic systems. It will attract a broad range of scientists from several disciplines.
Download or read book Estimation of Available Phosphorus in Soils by Extraction with Sodium Bicarbonate written by Sterling Robertson Olsen and published by . This book was released on 1954 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phosphorus in Soils and Plants written by Naser A. Anjum and published by BoD – Books on Demand. This book was released on 2024-01-31 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phosphorus (P) stands second to nitrogen in terms of its essentiality as a plant macronutrient, as well as due to its involvement in almost all plant developmental stages, primary and secondary plant metabolisms, maintenance of membrane structures, and in the structural skeleton of major biomolecules. An optimum P-supply also helps plants combat abiotic stress impacts. Most P in soil remains unavailable for uptake by plants. P-containing fertilizers are being added to agricultural lands to sustain high yields. Only the least amount of the applied P (20%–30%) is used by most cultivated plants, and the rest remains as legacy P (P surpluses), which eventually causes eutrophication. This book, Phosphorus in Soils and Plants, reviews P in soils and plants, P dynamics in the soil–water–sediment environment, the major roles of P in the photosynthetic dark phase-biochemical pathways, major approaches for the sustainable management of P in agriculture, main mechanisms underlying the role of P in the regulation of plant–microbe interactions in the rhizosphere, literature on the role of microbial phosphate solubilization in management of soil and plant nutrients, and insights into P recovery through waste transformation. This volume is an important resource for plant biologists involved in teaching or research who wish to advance their knowledge of P in soils and plants.
Download or read book Mapping the Chemical Environment of Urban Areas written by Christopher C. Johnson and published by John Wiley & Sons. This book was released on 2011-02-11 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive text focuses on the increasingly important issues of urban geochemical mapping with key coverage of the distribution and behaviour of chemicals and compounds in the urban environment. Clearly structured throughout, the first part of the book covers general aspects of urban chemical mapping with an overview of current practice and reviews of different aspects of the component methodologies. The second part includes case histories from different urban areas around Europe authored by those national or academic institutions tasked with investigating the chemical environments of their major urban centers.
Download or read book The Soils of Nepal written by Roshan Babu Ojha and published by Springer. This book was released on 2022-10-29 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book publishes consolidated information on the soils of Nepal from all possible sources. The Survey Department, Government of Nepal, conducted two national scale soil survey projects to classify soils of Nepal (Land Resource Mapping Project ended in 1985, and National Land Use Planning Project ended in 2021). Both projects adopted the United States Department of Agriculture system of soil classification. Besides, National Soil Science Research Center (previously known as Soil Science Division) of Nepal Agricultural Research Council and Soil Management Directorate, Department of Agriculture, also worked on soils of Nepal. To date, the information on the soils of Nepal is not published in well-documented form but has been reported widely as gray literature (project report or government report) or peer-review articles. 'The Soils of Nepal’ is a part of ‘World Soils Book Series’ which constitutes twelve chapters—covering broad aspects such as soil research history, climate, geology, soil classification and mapping, and soil fertility. Furthermore, information about soil properties and relation between soil constituents of the dominant soil types of Nepal and their scope of use in the context of land use are described. This book also tries to simplify the intricate relationship among soil, culture, and people. Each chapter contains a comprehensive, richly illustrated, and up-to-date overview of the soils of Nepal. We believe it fulfils a quest for a global audience including students, educators, extension workers, and soil scientists, who are interested to know the young soils of Nepal.
Download or read book Phosphorus Transformations in Soils During Semi arid Ecosystem Development written by Chunhao Gu and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Phosphorus (P) is an important element that often limits terrestrial ecosystem functions, and influences carbon and nitrogen cycling in soils. Soil P is derived ultimately from rock weathering, thus pedogenesis strongly determines P stock, speciation and bioavailability. Phosphorus transformations during pedogenesis in humid ecosystems can be well described with the conceptual model proposed by Walker and Syers (1976). However, the application of the model in semi-arid ecosystems has been contentious. In addition to rock weathering, aeolian dust deposition is another important P input to soils, but its influence on P transformations during pedogenesis remains poorly understood. Moreover, sequential chemical extractions (SCEs) are used to quantify P pools in the model. However, these pools are operationally defined, thereby affecting the model accuracy. Organic P transformations during pedogenesis in humid ecosystems are relatively well known; however, the transformations in semi-arid ecosystems and whether and how vegetation affects the transformations during pedogenesis remain unclear. The objectives of this dissertation were to determine the impacts of aeolian dust input and vegetation on P transformations during semi-arid ecosystem development and to evaluate the accuracy of the SCEs and how it affects the use of SCEs for testing the Walker and Syers model. Soil samples were collected from two 3-million-year old semi-arid soil chronosequences located in Arizona (substrate age gradient of Arizona, SAGA) and California (Merced chronosequence) as well as dust samples were collected from the SAGA sites. Phosphorus K-edge X-ray absorption near edge structure (XANES) spectroscopy was used to directly characterize soil P speciation, and solution 31P nuclear magnetic resonance (NMR) spectroscopy was used for detailed characterization of P0 composition.Results showed that aeolian dust deposition strongly altered soil P speciation by increasing calcium-bound P (Ca-P) fraction and decreasing Fe/Al-bound P fraction in older soils of SAGA, resulting in a P transformation pattern inconsistent with the Walker and Syers model. The effects of aeolian dust deposition on soil P transformations are functions of the relative magnitude of the net dust flux and weathering intensity of the ecosystem. The perturbation of dust deposition on P transformations was previously concealed by SCEs. A further analysis of the P pools of the model showed that non-occluded P (P[subscript]n-occ) pool was often significantly under-estimated because of the newly formed Ca-P in the NaHCO3 extraction residues, which were subsequently extracted by diluted HCl (DHCl) extraction. Thereby, the Ca P pool was over-estimated. Dissolution of Fe/Al oxides by DHCl and release of the associated P is another important reason for the Ca-P over-estimation. The NMR analysis showed that the P0 in the SAGA soils mainly consisted of phosphate monoesters and diesters. Some of the major P0 species changed in contrasting ways under different vegetation (i.e., under pine and juniper canopy and inter-canopy grass) during pedogenesis. The difference of the P0 composition between under-canopy and inter-canopy soils at each substrate age decreased with increasing substrate age. The decline can be ascribed to increasing exploration of soil P by soil communities and plants, and organic P homogenization due to tree canopy movement at each site during pedogenesis. This dissertation highlights the advantages of P K-edge XANES spectroscopy over SCEs in characterizing soil P dynamics, and SCEs may provide misleading conclusions when testing the Walker and Syers model. The improved understanding of the SCEs has broad implications for studying P dynamics in natural and agricultural ecosystems. Overall, this work provides a foundation for understanding how dust and vegetation influences P cycling during ecosystem development.
Download or read book Movement of Phosphorus in Soils as Influenced by Chelates and Soil Types written by Abd-Elmonem Sayed-Ahmad Mostafa and published by . This book was released on 1966 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Classification of Wetlands and Deepwater Habitats of the United States written by U.S. Fish and Wildlife Service and published by . This book was released on 1979 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatial Analysis written by Paul A. Longley and published by John Wiley & Sons. This book was released on 1997-04-17 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spatial Analysis: Modelling in a GIS Environment Edited by PaulLongley and Michael Batty Digital data and information are usedincreasingly by academics, professionals, local authorities, andgovernment departments. Powerful new technologies, such asgeographic information systems (GIS), are being developed toanalyse such data, and GIS technologies are rapidly becoming partof the emergent world digital infrastructure. This book shows howcomputer methods of analysis and modelling, built around GIS, canbe used to identify ways in which our cities and regions might bebetter planned and understood. The contributors to this book areall actively involved in research using geographic informationsystems. This book will be valuable reading for: * Geographers, researchers, and regional analysts * Population theorists and regional economists with interests inlarge-scale demographic and employment data * Planners and policy-makers who wish to use GIS to improve theirdecision making * Business analysts who wish to explore markets using the mostrecent advances in digital spatial data technology * All those interested in geodemographics Paul Longley is Professor of Geography at the Department ofGeography, University of Bristol, United Kingdom. Michael Batty isProfessor of Spatial Analysis and Planning at the UniversityCollege London. United Kingdom.
Download or read book The Ecophysiology of Plant Phosphorus Interactions written by Philip J. White and published by Springer Science & Business Media. This book was released on 2008-06-03 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phosphorus (P) is an essential macronutrient for plant growth. It is as phosphate that plants take up P from the soil solution. Since little phosphate is available to plants in most soils, plants have evolved a range of mechanisms to acquire and use P efficiently – including the development of symbiotic relationships that help them access sources of phosphorus beyond the plant’s own range. At the same time, in agricultural systems, applications of inorganic phosphate fertilizers aimed at overcoming phosphate limitation are unsustainable and can cause pollution. This latest volume in Springer’s Plant Ecophysiology series takes an in-depth look at these diverse plant-phosphorus interactions in natural and agricultural environments, presenting a series of critical reviews on the current status of research. In particular, the book presents a wealth of information on the genetic and phenotypic variation in natural plant ecosystems adapted to low P availability, which could be of particular relevance to developing new crop varieties with enhanced abilities to grow under P-limiting conditions. The book provides a valuable reference material for graduates and research scientists working in the field of plant-phosphorus interactions, as well as for those working in plant breeding and sustainable agricultural development.
