@article{Sabirova2014productivity,
author={Sabirova, R.M. and Shakirov, R..},
title={Productivity of Кazanskaya 560 winter wheat variety,  depending on fertilizers and soil nutrient},
journal={Vestnik of Kazan State Agrarian University},
publisher={Kazan state agrarian University},
year={2014},
pages={134-137},
volume={8},
issue={4},
}