Abstract
Al Rawafed Serbia (ARS) company was established in 2015 and is working on 10.500ha, mainly field crops. Each of 25 main selfpropeled machines has Trimble navigation systems installed, with TMX 2050 monitor and modem, which provides data transfer. On combines, crop yield and moisture monitoring sensors were installed. Trimble Ag desktop software enables an ability to create yield maps and histogram with different yield range and an ability to see the size of the yield zone. Using that data, it was found that the average yield masks real information about the yield across the field and regardless of cultivated crop and precipitation, the same zones show the same trend of yield differentials. Operator and machine issues are connected only to one crop year and they are not repeatable, but soil issues require deeper and studious research to determine if there is worth in investing in repairing the condition of the soil or just minimizing the amount of seed and fertilizer.
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