TY JOUR TI ASSESSMENT OF OPTIMUM SOIL FEATURES AND PLANT FOOD COMPOUND DEFICIENCY USING THE METHODS BASED ON FEEDBACK PRINCIPLES KW soil fertility KW need for food compounds KW photosynthesis KW complex compounds KW sorption properties of roots JO INTERNATIONAL AGRICULTURAL JOURNAL AU Savich, V.. AU Borisov, B.. AU Gukalov, V.. PY 2018 IS 1 PB Electronic science