Nitrogen, soil

NO Soil nitrogen, soil temperature, soil water (soil physical properties) approximately empirical... 

Binkley, D., Sollins, P. and McGill, W.B. 1985 Natural abundance ofnitrogen-15 as a tool fortracing alder-fixed nitrogen. Soil Science Society of America Journal 49 444-447. 

J. H. Qian, J. W. Doran, and D. T. Walters, Maize plant contributions to root zone available carbon and microbial transformations of nitrogen. Soil Biol. Biochem. 29 1451 (1997). 

M. Clarholm, Interactions of bacteria, protozoa and plants leading to mineralisation of soil nitrogen. Soil Biology and Biochemistiy / 7 181 (1985). 

Berry, P.M., Sylvester-Bradley, R., Philipps, L., Hatch, D.J., Cuttle, S.P., Rayns, F.W. and Gosling, P. 2002. Is the productivity of organic farms restricted by the supply of available nitrogen Soil Use and Management 18 248-255. 

Tests to determine the competition for nitrogen soil tests in... 

In the natural ecosystem, the nitrogen content in the soil is kept at a fairly steady level which depends on the climate, vegetation type, physicochemical characteristics of the soil, nature of the terrain, and microflora and microfauna activity [23]. The nitrogen-soil relationship is, however, simultaneously dynamic, and any change of characteristics of the environment can result in a change of the soil nitrogen level. As a result of this, there are different nitrogen contents in different soils, not only in the topsoil, but also in the profile. 

Merriam J., McDowell W.H., and Currie W.S. 1996. A high-temperature catalytic oxidation technique for determining total dissolved nitrogen. /. Soil Sci. Soc. Am. 60 1050-1055. 

Comparisons of nitrogen Soil Science Society America... 

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