TY JOUR TI INVESTIGATION OF SOME PARAMETERS OF DRIP IRRIGATION BY HYDRAULIC EVALUATION OF DROPPERS KW irrigation KW drip irrigation KW assessment KW droppers with pressure compensation KW flow KW uniform distribution KW volume flow JO Vestnik of Kazan State Agrarian University AU Abdelfattah, A.H. AU Ivanov, B.L. AU Ziganshin, B.G. PY 2019 IS 14 PB Kazan state agrarian University