METHOD OF DETERMINING EFFECT OF CULTIVATION ON SOIL Russian patent published in 1995 - IPC

FIELD: agriculture. SUBSTANCE: method involves taking soil sample and fractionating it by particle size. Novelty resides in taking additionally at least a 0.5 kg control sample of soil non-cultivated for at least four years, fractionating it through a column of sieves for 30 s and determining the percentage of non-aggreggated elementary soil particles in resulting fractions with relation to initial mass of control sample, and their total content which latter is taken to be a minimum content C_min of non-aggreggated elementary soil particles in this particular soil, then determining their maximum content C_max by the relation C_max= C_min/0,382 and the interval C_max-C_min which is taken for the reference value. Then C_факт is determined in the sample by the method of determining C_min and by comparing it with reference interval a decision is made as to whether the given type of cultivation is acceptable for the given type of soil. EFFECT: higher accuracy and completeness of estimation.