Download or read book The mechanism of potassium fixation in soils and the availability of written by Leo Kolodny and published by . This book was released on 1938 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of a Potassium Fixation Mechanism in Soils written by J. P. Gaultier and published by . This book was released on 1981 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Improving Potassium Recommendations for Agricultural Crops written by T. Scott Murrell and published by Springer. This book was released on 2022 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book highlights concepts discussed at two international conferences that brought together world-renowned scientists to advance the science of potassium (K) recommendations for crops. There was general agreement that the potassium recommendations currently in general use are oversimplified, outdated, and jeopardize soil, plant, and human health. Accordingly, this book puts forward a significantly expanded K cycle that more accurately depicts K inputs, losses and transformations in soils. This new cycle serves as both the conceptual basis for the scientific discussions in this book and a framework upon which to build future improvements. Previously used approaches are critically reviewed and assessed, not only for their relevance to future enhancements, but also for their use as metrics of sustainability. An initial effort is made to link K nutrition in crops and K nutrition in humans. The book offers an invaluable asset for graduate students, educators, industry scientists, data scientists, and advanced agronomists.
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 Potassium Fixation and Availability written by Lawrence O. Fine and published by . This book was released on 1941 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relationships of Potassium Fixation and Release to the Clay Mineral Composition of Some Michigan Soils written by Samuel Lewis Cummings and published by . This book was released on 1959 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Potassium in Agriculture written by Robert D. Munson and published by . This book was released on 1985 with total page 1223 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Availability and Fixation of Potassium in Pasture Soils written by Louis Salvatore Marcello and published by . This book was released on 1940 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Iron in Soils and Clay Minerals written by J.W. Stucki and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 903 pages. Available in PDF, EPUB and Kindle. Book excerpt: Probably more than any other element, iron markedly influences the chemical and physical properties of soils and sediments in the earth. Considering its transition metal status, with potential variation in electronic configuration, ionic radius, and magnetic moment, combined with its abundance and relatively large mass, little wonder that one sees its unique influence on every hand. Pre sentations at the NATO Advanced Study Institute (NATO AS!) on Iron in Soils and Clay Minerals reviewed and discussed the occurrence, behavior, and properties of Fe-bearing minerals found in soils and in the clay mineral groups kaolinite, smectite, and mica. Also discussed at the NATO AS! were the basic chemical properties of Fe, methods for separating and identifying Fe in minerals, and the role of Fe minerals in weathering and other soil-forming processes. The present publication is the reviewed and edited proceedings of that Advanced Study Institute. The sequence of chapters follows the general pattern beginning with introductory chapters which overview the general occurrence of Fe in the earth and its chemistry, both generally and in mineral environments, followed by identification and characterization methods for Fe and Fe phases in minerals. The properties and behavior of Fe oxides, Fe-bearing clay minerals, and other Fe minerals in soils are then described, and the text ends with a summary of the role of Fe in soil-forming processes. A Table of Contents and subject index are provided to assist the reader in finding specific topics within the text.
Download or read book Potassium Fixation in Soils Derived from Granitic and Non granitic Alluvium of the San Joaquin Valley California written by Maria Alexandrovna Murashkina and published by . This book was released on 2006 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Factors Affecting the Availability of Potassium Through Fixation and Release in Soils of Diverse Mineralogical Composition written by Gordon Lawrence Rees and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The management of soil potassium is complicated by sorption and release of K by soil minerals, with fixation of K by vermiculite removing it from the pool of readily-available exchangeable K. Several laboratory methods have been developed to characterize different pools of soil potassium, including ammonium acetate extraction of exchangeable K (XK), sodium tetraphenylboron extraction of exchangeable and some nonexchangeable K (TPB-K), and a method to estimate the potential of soils to fix K (Kfix). In order to understand the relationship of these methods to each other and to K uptake by plants, we undertook a series of experiments to evaluate the effect of K concentration, incubation time, soil moisture content, and mineralogy on soil K pools. Additions of K equal to initially measured Kfix values only partially reduced K fixation, and increased XK and TPB-K by less than the amount of K added, indicating that some K was fixed strongly enough to be removed from the nominally plant-available pool. Duration of incubation with K from 1 to 16 days did not significantly impact K fixation or availability as measured by these methods, indicating that fixation reactions took place within the first 24 hours. Incremental additions of potassium up to an amount equal to the cation exchange capacity resulted in increasing amounts of K fixed. For some soils, a plateau was reached indicating a maximum level of K fixation, but for other soils it is unclear if a maximum was achieved. Recovery of K by the TPB-K method was roughly twice as efficient as by the XK method. Approximately 50% of fixed K was plant-available nonexchangeable K (PANK), meaning it was recovered by the TPB-K method but not by the XK method. A single air-drying event, relative to soils maintained at field-moist water content, resulted in an increase in Kfix for all K-fixing soils by an average of 55 mg kg−1, but the change in Kfix for non-K-fixing soils was not consistent. The change in Kfix was not correlated with XK values. Changes in XK with drying were less than 20 mg kg−1 for most samples, with XK increasing for most K-fixing and low-XK soils, with less consistency for high-XK soils. Multiple cycles of wetting and drying did not result in further changes in soil K measurements. In a greenhouse pot study, K uptake by annual ryegrass (Lolium multiflorum) was best correlated with TPB-K (r=0.8966), and yield was best correlated with total K by aqua regia digestion (r=0.7465) followed by TPB-K (r=0.6692). The critical value for yield response determined by the TPB-K method was most successful in predicting significant responses to increased K rates. The XK method also performed well in this respect. K fixation by one soil resulted in reduced uptake of K, and in yield responses to higher K rates than predicted by critical values for all methods. For other soils, the effect of K fixation potential was unclear. Atomic force microscopy of clay grains from selected K-fixing soils and standard clays revealed complex surface morphology for most soils which made it impossible to delineate changes in layer spacing with K sorption or release. Nearly-flat surfaces and stacks of relatively few layers in smectite clays were more conducive to this analysis. For both montmorillonite and beidellite standards, layers collapsed with displacement of Na+ by K+, and re-expanded after extraction with a TPB solution. No zones of preferential K fixation or release were observed.
Download or read book Potassium Fixation and Release in Several Agricultural Soils of Georgia written by Marcus Michael Eichhorn and published by . This book was released on 1963 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanism of Potassium Fixation by Various Clays I written by Thell Arthur Bailey and published by . This book was released on 1942 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Potassium Fixation and Supply by Soils with Mixed Clay Minerals written by Billy W. Hipp and published by . This book was released on 1969 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanism of Potassium Fixation by Various Clays I written by Charles Frederick Bailey and published by . This book was released on 1921 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Soil Type on Potassium Fixation written by Maurice L. Horton and published by . This book was released on 1959 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Potassium Fixation in Soils as Affected by Type of Clay Mineral Moisture Conditions and Concentration of Other Ions written by George Stanford and published by . This book was released on 1947 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
