Results 211 to 220 of about 17,595 (257)
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Proton Sinks in Soil Controlling Soil Acidification
1991This presentation concerns the reaction of the soil and its various constituents with added protons and the ensuing changes induced in the systems’s properties. As these properties largely manifest themselves via the “carrier” agent, the soil solution, it seems logical to use the proton activity in the soil solution, or soil pH value, as the principal ...
Bruggenwert, M.G.M. +2 more
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Acidification and alkalinization of soils
Plant and Soil, 1983Acidification or alkalinization of soils occurs through H+ transfer processes involving vegetation, soil solution and soil minerals. A permanent change in the acid neutralizing capacity of the inorganic soil fraction (ANC(s)),i.e. soil acidification (ΔANC 0), results from an irreversible H+ flux. This irreversible H+ flux can be caused either by direct
van Breemen, N. +2 more
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Acidification of soils by trees and forests
Soil Use and Management, 1985Abstract. The impact of isolated trees and natural forest vegetation on soil acidity is discussed. There is a considerable variation in impact between species on similar soils and between sites for any given species. The effect of coniferous plantations on soil acidity is reviewed and the causes of any increased
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Effect of soil acidification on the soil microflora
Water, Air, and Soil Pollution, 1979The effects of short and long term acidification on a few Alberta soils were studied with respect to bacterial numbers and total soil respiration. Significant reductions in bacterial numbers were observed in both short and long term acidified soils. Total soil activity was severely affected in an acid soil (pH 3.0, longterm) adjacent to a S block.
R.D. Bryant, E.A. Gordy, E.J. Laishley
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Soil Acidification and Alkalinization
1991In this chapter I briefly discuss the nature of soil acidification and alkalinization, and define these processes in terms of changes in the relevant capacity factors. Next, the contribution of various sources of soil acidification and their quantitative importance is treated in some detail: (1) effects of addition of acids or bases by irrigation and ...
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Effect of soil acidification on nitrification in soil
Canadian Journal of Soil Science, 2015Zebarth, B. J., Forge, T. A., Goyer, C. and Brin, L. D. 2015. Effect of soil acidification on nitrification in soil. Can. J. Soil Sci. 95: 359–363. This laboratory experiment examined the effect of elemental S-induced variation in soil pH (3.97–5.29) on nitrification enzyme activity and conversion of [Formula: see text] to [Formula: see text ...
Bernie J. Zebarth +3 more
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A critique of models for freshwater and soil acidification
Water, Air, and Soil Pollution, 1986Four types of models quantifying effects of acid deposition on freshwaters are reviewed. These include Henriksen’s empirical model, an adsorption isotherm model, soil-oriented charge balance models (Reuss-Johnson, Birkenes, MAGIC, ILWAS), and the Trickle Down model.
John O. Reuss +2 more
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1980
Acidification is a natural process that occurs continuously in soils through which water percolates. Precipitation acidified by industrial pollutants does not constitute a special case but is a source of acidity additional to a number of natural ones. Its effects must therefore be assessed in the context of soil acidification in general.
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Acidification is a natural process that occurs continuously in soils through which water percolates. Precipitation acidified by industrial pollutants does not constitute a special case but is a source of acidity additional to a number of natural ones. Its effects must therefore be assessed in the context of soil acidification in general.
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Acidification of a solonetzic soil by nitrogenous fertilizers
Journal of Environmental Science and Health, Part B, 1982Annual applications of (NH4)2SO4, NH4NO3 and urea on a Solonetzic soil at 112 kg N/ha for 10 consecutive years reduced pH levels from 5.6 for the check to 4.4, 4.9 and 5.3, respectively for (NH4)2SO4, NH4NO3 and urea. (NH4)2SO4 generated twice as much exchange acidity as NH4NO3 and four times as much as urea. Net extractable cations leached from the Ap
K J, Perl, G R, Webster, R R, Cairns
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Dynamics of soil acidification: an economic analysis
Ecological Economics, 1999Abstract This paper studies the dynamic aspects related to the problem of acidification. It shows how accumulation of acidification in ecosystems can be studied in economic modelling by incorporating dynamic aspects of soil acidification. In contrast to the often applied critical loads approach which only focuses on the final state of a soil, the ...
Schmieman, E.C., van Ierland, E.C.
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