METHOD FOR ESTIMATING CONDITION OF HUMUS TYPE SOIL Russian patent published in 2008 - IPC G01N33/24 

FIELD: biotechnology, possible use for estimating changes of qualitative characteristics of tillage, primarily humus type, during cropping.

SUBSTANCE: in accordance to the method, alienable yield is accounted and after harvesting, biological characteristics of fertility in samples of arable layer soil are researched, including total content of microorganisms of microbe cenosis ∑X_mi, content of humus and detritus X_hd, biomass of microorganisms and vegetative remainders X_bv, nitrification ability X_n and fermentative activity X_ai. Further, degree to which soil is plowed out is computed according to formula B=k₀[K₁∑X_mi+K₂X_hd+K₃X_bv+K₄X_n+K₅∑X_ai-375,5], where K₀-K₅ - empiric coefficients: K₀=(1,5...2,1), K₁=(0,85...1,25), K₂=(0,2...0,3), K₃=(0,2...0,9), K₄=(0,7...0,8), K₅=(0,4...0,8), and the quality of soil is estimated in numerical scale from one to fifteen, where: B=0-3 points indicates non-plowed soils, B=3-5 points indicates mildly plowed soils, B=5-10 points indicates averagely plowed soils, and B=10-15 points indicates substantially plowed soils.

EFFECT: increased precision when estimating condition of soil and efficiency of land utilization.

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