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Charge Characteristics And Ion Exchange Equilibria In Soils From The Humid Tropics Of Brasil
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Book Synopsis Charge Characteristics and Ion Exchange Equilibria in Soils from the Humid Tropics of Brasil by : Francisco Ilton de Oliveira Morais
Download or read book Charge Characteristics and Ion Exchange Equilibria in Soils from the Humid Tropics of Brasil written by Francisco Ilton de Oliveira Morais and published by . This book was released on 1975 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of the distribution of electric charges in the A and B horizons of some Oxisols, Alfisols and a Mollisol from Brasil was made by direct measurement of retention of ions in the presence of varying electrolyte concentration. Sample of an Oxisol, Ultisol, and an Alfisol were also used for ion-exchange studies by means of a saturation-displacement procedure. With the exception of the Mollisol, where the surface potential could be visualized as being of the variable type, the electrochemical behavior of the soils was found to be similar to that of the constant potential systens ub which the surface potential is determined by H+ and oH- ions in the equilibrium solution; hence charge distribution varied substantially with pH and electrolyte concentration. The concentration effect was not as pronounced as the pH effect and in some cases was not statistically significant. Direct measurement of adsorption of ions from MgSO4, MgC12, K2SO4, KC1, and Nac1 showed that the nature and valence of the counter ion also influenced the magnitude of the eletric charges on the soil particles. However, with respect to K the changes in charge were due to anion effects not cation effects, suggesting a strong affinity of K for the soil materials. The ZPC of the soils determined by plotting the net charges against pH varied from 1.2 to 3.4 in the A horizons and from 4.0 to 6.1 in the B horizons. lThe surface horizons of the soils were, in general, net negatively charged at or near their field pH. This fact was found to be ...
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1976 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Charge Characteristics of Soils from the Coastal Region of Pernambuco, Brazil by : Antonio Fernando Magalhães
Download or read book Charge Characteristics of Soils from the Coastal Region of Pernambuco, Brazil written by Antonio Fernando Magalhães and published by . This book was released on 1979 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Science written by David L. Rowell and published by Routledge. This book was released on 2014-06-03 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offers a practical introduction to the various basic methods of assessing the properties of soil. Each method is explained in a concise and accessible manner, providing useful guidance on how each method might be used in a practical situation.
Book Synopsis United States Doctoral Dissertations in Third World Studies, 1869-1978 by : Michael Sims
Download or read book United States Doctoral Dissertations in Third World Studies, 1869-1978 written by Michael Sims and published by [Los Angeles, Calif.] : Crossroads Press. This book was released on 1980 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Agriculture & Agronomy by : University Microfilms International
Download or read book Agriculture & Agronomy written by University Microfilms International and published by . This book was released on 1977 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Index to American Doctoral Dissertations by :
Download or read book Index to American Doctoral Dissertations written by and published by . This book was released on 1974 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comprehensive Dissertation Index by :
Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1984 with total page 1086 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1973- include the following subject areas: Biological sciences, Agriculture, Chemistry, Environmental sciences, Health sciences, Engineering, Mathematics and statistics, Earth sciences, Physics, Education, Psychology, Sociology, Anthropology, History, Law & political science, Business & economics, Geography & regional planning, Language & literature, Fine arts, Library & information science, Mass communications, Music, Philosophy and Religion.
Book Synopsis Surface Charge and Colloidal Properties of Benchmark Brazilian Oxisols by : Jonathan David Chorover
Download or read book Surface Charge and Colloidal Properties of Benchmark Brazilian Oxisols written by Jonathan David Chorover and published by . This book was released on 1993 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agronomy News written by and published by . This book was released on 1975 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sept.-Oct. issue includes list of theses and dissertations for U.S. and Canadian graduate degrees granted in crop science, soil science, and agronomic science during the previous academic year.
Book Synopsis Bibliographic Guide to Latin American Studies by :
Download or read book Bibliographic Guide to Latin American Studies written by and published by . This book was released on 1979 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comprehensive Dissertation Index: Agriculture by :
Download or read book Comprehensive Dissertation Index: Agriculture written by and published by . This book was released on 1984 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Toxicity of A1 (III) to Coffee (Coffea Arabica, L.) in Nutrient Solution Culture and in Oxisols and Ultisols Amended with CaCO3, MgCO3, and CaSO4.2H2O by : Marcos Antonio Pavan
Download or read book Toxicity of A1 (III) to Coffee (Coffea Arabica, L.) in Nutrient Solution Culture and in Oxisols and Ultisols Amended with CaCO3, MgCO3, and CaSO4.2H2O written by Marcos Antonio Pavan and published by . This book was released on 1981 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: Growth and development of coffee plants on acid soil are restricted by high concentrations of soluble Al and low base saturation. Solution culture and soil experiments were conducted to study the effect of Al and Ca nutrition on coffee seedlings and a soil experiment was conducted to measure the neutralization of subsoil acidity by the application of carbonate and sulfate materials to the surface horizon. Specifically, the solution culture experiments were designed to show the influence of (1) low to excessive concentrations of Al, (2) low to high Ca concentrations on the toxicity of Al, and (3) ionic strength of nutrient solution on Al toxicity. Aluminum toxicity was associated with reduced uptake of Ca, Mg, and P; increased uptake of K and Al, and reduced shoot and root growth. Increasing the Ca concentration did not offset the toxicity of the Al treatments. Aluminum toxicity was found to be correlated with the activity of Al 3+ rather than the total Al or Al3+ concentrations. The critical aAl 3+ concentrations. The critical aAl 3+ value was 0.65 x 10-5.
Download or read book Soils and Fertilizers written by and published by . This book was released on 1979-07 with total page 764 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.
Book Synopsis Catalog of OAS technical reports and documents by : Organization of American States. General Secretariat
Download or read book Catalog of OAS technical reports and documents written by Organization of American States. General Secretariat and published by . This book was released on 1974 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agrindex written by and published by . This book was released on 1975 with total page 998 pages. Available in PDF, EPUB and Kindle. Book excerpt:
