Koltsov S. Change of the humus formation and agrophysical state of soils in rice-lucern rotation and their influence on rice productivity.

Object of researches: solonetz meadow natural and mastered in rice-lucern rotations in Crimea. The purpose of researches: studying of a condition, agroecological, agrophysical properties of solonetz meadow, its change under influence of specific technologies of rice cultivation. Methods of researches: field, laboratory, mathematic-statistical, settlement - comparative. Results of researches: 1) for the theory - the new scientific data on the mechanism of changes soil formation processes and key parameters solonetz meadow virgin soils Prisivashja under influence of long cultivation of rice are received; 2) for practice - the scientifically-grounded recommendations to manufacture on management of soil fertility earlier low soil fertility are developed, that allows to increase considerably potential opportunities of these soils. Sphere of use: substantive provisions of researches can find practical use in ricegrowing economy of the South Ukraine.