TY JOUR TI Precision farming as a cost reduction factor: cases and calculations KW precision farming KW GNSS/RTK guidance KW variable rate application (VRT) KW variable rate irrigation (VRI) KW NDVI/NDRE KW SAR KW FMS KW COGS KW plant protection products KW fuel and lubricants KW ROI JO JOURNAL OF MONETARY ECONOMICS AND MANAGEMENT AU Litvinov, A.A. PY 2025 IS 0 PB ITBO University