Results 251 to 260 of about 88,720 (301)

Proton Sinks in Soil Controlling Soil Acidification

1991
This 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., Hiemstra, T., Bolt, G.H.   +2 more
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Acidification and alkalinization of soils

Plant and Soil, 1983
Acidification 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., Mulder, J., Driscoll, C.T.   +2 more
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Soil Acidification: Fundamental Concepts

1986
Natural soil acidification processes have been recognized and studied for decades or perhaps centuries. An understanding of these processes is essential to an understanding of soils and of natural and agricultural ecosystems. One of the most important characteristics of soils is the cation-exchange complex.
J. O. Reuss, D. W. Johnson
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Soil Acidification and Alkalinization

1991
In 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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Dynamics of soil acidification: an economic analysis

Ecological Economics, 1999
Abstract 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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Aluminum weathering in soil acidification modelling

Chemical Geology, 1990
Abstract Enhanced dissolution of Aluminum in acidic forest soils is one of the most pronounced soil chemical effects of acidic deposition. Dissolved monomeric Aluminum is toxic to aquatic organisms and has been hypothesized as a major cause of forest die-back in Central Europe (1).
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Nitrogen supply, tree growth and soil acidification

Fertilizer Research, 1991
Nitrogen is absorbed by trees in quantities larger than any of the mineral nutrients. It can be taken up by trees as NH4 and as NO3, but the relative ease with which they are absorbed does not necessarily reflect the degree of preference shown by tree species for either of the N forms.
Arnold, G., van Diest, A.
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Effect of soil acidification on nitrification in soil

Canadian Journal of Soil Science, 2015
Zebarth, 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, Thomas A. Forge, Claudia Goyer, Lindsay D. Brin   +3 more
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Effect of soil acidification on the soil microflora

Water, Air, and Soil Pollution, 1979
The 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 in Loess and Clay Soils in The Netherlands

Water, Air, and Soil Pollution, 2000
To assess the impact of acid deposition on forested loess and clay soils in the Netherlands, changes in base saturation and soil solution concentrations were simulated with the dynamic soil acidification model ReSAM for 38 loess soils and 16 clay soils. The selected locations represent the range in geographical position and diversity in parent material
van der Salm, C., de Vries, W.
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