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Quantitative Prediction of Leaching in Field Soils
Author(s) -
Terry D. L.,
McCants C. B.
Publication year - 1970
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1970.03615995003400020027x
Subject(s) - leaching (pedology) , soil water , porosity , soil science , cation exchange capacity , chemistry , environmental science , organic chemistry
Leaching experiments were conducted under controlled water regime conditions on a variety of soils in the field to study the distribution of certain ions by percolated water. When NH 4 , NO 3 , and K were leached, their movement was generally in the form of a “normal” distribution. The movement of Mg was not as well defined as the other ions. Multiple regression equations for predicting the leaching of these ions were developed which utilize the parameters of a normal distribution as the dependent variables and properties of the soil and quantities of percolated water as the independent variables. The R 2 values for mean movement ranged from 0.92 to 0.97 and those for the standard deviation from 0.56 to 0.91. The principal independent variables were (i) quantity of percolated water, (ii) soil porosity as expressed by the weighted porosity index, (iii) cation exchange capacity, and (iv) the water content at 0.1 bar suction.