00500naa#a2200169#i#450# EN\\bibl\3290 20241202064054.1 2073-0462 20141010b2014####ek#y0engy0150####ca RUS RU Influence of predecessors on productivity of a spring-sown field on gray forest soils Journal article Kazan Kazan state agrarian University 2014 4 с. Journal article local Borisova Elena naukaru.ru