%0 Journal Article %T PRODUCTIVITY OF WHEAT (POLBA) OF RUNO VARIETY AT VARIOUS LEVELS OF MINERAL NUTRITION, SOWING NORMS AND DEPTH OF SEEDS FINISHING IN THE KAMA PRECKALM ZONE OF THE REPUBLIC OF TATARSTAN %A Shaykhutdinov, F.. %A Serzhanov, I.. %A Ibyatov, R.. %A Zinnatullin, D.H. %A Valiev , A.. %K sowing rate, seeding depth, productivity, wheat polba. %J Vestnik of Kazan State Agrarian University %D 2018 %N 12 %P 4 %I Kazan state agrarian University