00547naa#a2200181#i#450# EN\\bibl\1126 20260224223358.2 2073-0462 20140113b2014####ek#y0engy0150####ca RUS RU Balance of nitrogen in the agriculture of baltasi municipal region of the republic of Tatarstan Journal article Kazan Kazan state agrarian University 2014 6 с. Journal article local Muratov Marsel Gilyazov Minnegali zh-szf.ru