PREDICTION HUMUS LEVEL OF BLACK SOILS OF FOREST-STEPPE UKRAINE DEPENDING ON THE APPLICATION OF CROP ROTATION, FERTILIZATION AND TILLAGE

Abstract

International Journal of Ecosystems and Ecology Science (IJEES) Volume 9, issue 1, 2019 https://doi.org/10.31407/ijees https://doi.org/10.31407/ijees91 _____________________________________________________________________________________________ 18 Vol. 9 (1): 155-162 (2019) PREDICTION HUMUS LEVEL OF BLACK SOILS OF FOREST-STEPPE UKRAINE DEPENDING ON THE APPLICATION OF CROP ROTATION, FERTILIZATION AND TILLAGE Petro Boyko, Dmitry Litvinov, Olexander Demidenko, Mikhailo Blashchuk, Volodymyr Rasevich NRC Institute of Agriculture NAAS , Ukraine; National university of life and environmental sciences of Ukraine, Ukraine; The Cherkassy state agricultural scientific research station of NRC «Institute of agriculture NAAS , Ukraine; Corresponding Author Dmitry Litvinov, e-mail: [email protected]; [email protected]; Received January 2018; Accepted January 2018; Published February 2019; DOI: https://doi.org/10.31407/ijees9118 UOI license: http://u-o-i.org/1.01/ijees/85534566