TY JOUR TI PHOTOMETRIC PARAMETERS OF PLANTS AND WHEAT YIELD, CULTIVATED OF SEEDS ON DIFFERENT NUTRITION BACKGROUND IN THE CONDITIONS OF GRAY FOREST SOILS OF KAMA KW leaf area KW dry matter collection KW nutrition background KW productivity. JO Vestnik of Kazan State Agrarian University AU Serzhanov, I.. AU Shaykhutdinov, F.. AU Ganiev , A.. PY 2018 IS 12 PB Kazan state agrarian University