volume 25 issue 2 (june 2004) : 152-156
MINERALIZATION OF SOIL ORGANIC NITROGEN - A REVIEW
1Department of Soil Science,
°Ambro5 Alii University, Ekpoma - Nigeria
ABSTRACT
Three models viz., single exponential, double exponential and hyperbolic have been used extensively by researchers to describe net mineralization of nitrogen in the soils. Many authors have opined that the double exponential model is better than the single exponential model for describing organic nitrogen mineralization in the disturbed soil samples. Researchers have also indicated that the single exponential model as well as the hyperbolic model can be used to estimate reliable No (Nitrogen mineralization potential) and K (rate constant) values in soils if a non linear square fitting techniques is used. However, it is imperative to note that organic nitrogen mineralization rate is affected by factors such as soil moisture, temperature, nature of organic matter, texture, cultivation and type of amendment added to the soils etc. Relevant literature pertaining to factors influencing mineralization of soil organic nitrogen, indicators of net nitrogen release and predictive models have been documented here.
KEYWORDS
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