REGULATORY AND LEGISLATIVE ASPECTS OF THE ECOLOGICAL EVALUATION AND CONTROL OF SOIL DEGRADATION IN RUSSIA ON THE BASIS OF THE ASSESSMENT OF SOIL ECOLOGICAL FUNCTIONS Article Yakovlev A.S., Makarov O.A., Krasilnikov P.V., Evdokimova M.V., Molchanov E.N., Savin I.Y., Chukov S.N. Eurasian Soil Science. Vol. 48. 2016. P. 991-996