Comparison of some soil total nitrogen determination methods
1995
Karklins, A. (Latvia University of Agriculture, Jelgava (Latvia). Faculty of Agriculture)
The soil total nitrogen (Ntot) determination was made for 37 top-layer soil samples taken from agricultural land in Latvia. The soil tests were carried out simultaneously at the Latvia University of Agriculture (in cooperation with Dr. G.Mezals) and at the Swedish University of Agricultural Sciences (in cooperation with prof. J.Persson and Dr. E.Otabbong) making use of the standard Kjeldahl method and dry combustion procedure. Additional indirect Ntot calculation was made based on soil pH and organic matter content. A new method for indirect Ntot calculation is proposed in the form of equation of regression. The obtained data present high mutual correlation between the applied analytical methods as well as indirect calculations.
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