Journal Article10.4141/CJSS82-013
Quantitative relationship between net nitrogen mineralization and moisture content of soils
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TL;DR: In this article, the 0-to 15-and 15-to 30-cm depths of five cultivated Queensland soils and 32 virgin and cultivated western Canadian soils were incubated at a range of moisture contents for 14 days at 35 °C.
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Abstract: The 0- to 15- and 15- to 30-cm depths of five cultivated Queensland soils and 32 virgin and cultivated western Canadian soils were incubated at a range of moisture contents for 14 days at 35 °C. In most soils, net nitrogen mineralization was linearly related to moisture content in the available range (−0.03 to −4.0 MPa). Optimum moisture for net nitrogen mineralization corresponded to a soil pore water potential of between −0.01 and −0.03 MPa, while that at which no net nitrogen mineralization occurred was close to −4.0 MPa. Initially, the regression for each soil was normalized by the method of Stanford and co-workers, but this technique proved unsatisfactory. However, by normalizing against available moisture (between −0.03 and −4.0 MPa) we succeeded in grouping the soils. The response of all soils could be described by a model of the form: y = bx + (1 − b)x2 constrained to pass through x0, y0 and x1, y1when both axes were scaled between 0 and 1. In the equation, y is net nitrogen mineralized expressed ...
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References
Relationships between soil respiration and soil moisture
TL;DR: This paper is re-evaluated in the light of subsequent studies that allow the principle of separation of variables to be tested and lends further credence to the linear relationship proposed between soil respiration and water content.
940
The Effect of Soil Moisture Tension on Carbon Dioxide Evolution, Nitrification, and Nitrogen Mineralization
TL;DR: In this paper, four soils were incubated at 30°C. for 14 days under soil moisture conditions varying from zero tension to airdry soil after which NO₃-N and NH₄-N were measured.
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Nitrogen transformations in an incubated soil as affected by combinations of moisture content and temperature and adsorption-fixation of ammonium
C. G. Kowalenko,D. R. Cameron +1 more
TL;DR: In this paper, an incubation experiment was conducted on a clay loam soil using a factorial design to study the effects of temperature, water content, and NH4+-N on the change of NO 3−-N and NH 4++N concent
99
The critical relationship between soil moisture content in the region of wilting point and the mineralization of natural soil nitrogen
TL;DR: Lab incubation studies with topsoil samples of the Kikuyu red loam coffee soil have shown that active nitrification of the natural soil nitrogen stops at a soil moisture level just below the permanent wilting percentage, and ammonia nitrogen accumulates substantially.
72
Effect of Soil Mositure on Ammonification and Nitrification in Two Northern Plains Soils1
TL;DR: In this article, Chestnut and Chernozem soil was incubated at constant water contents ranging from suctions of 0.2 to about 100 bars, and the exchangeable NH₄- and soluble NO₂-N measured periodically.
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