TY JOUR TI TO THE QUESTION OF TISSUE DIAGNOSIS OF CROPS NUTRITION IN PRECISION FARMING SYSTEM KW space systems of agriculture KW preci-sion agriculture KW differentiated way of fertilizers’ ap-plication KW vegetable diagnostics KW correlation KW the content of nitrates in plants and soil JO Bulletin of KSAU AU Eryomin, D.I. AU Kibuk, Y.P. AU Akhmetova, A.S. PY 2017 IS PB Krasnoyarsk State Agrarian University