Effects of Season and Phenology-based Changes on Soil Erodibility and Other Dynamic RUSLE Factors for Semi-arid Winter Wheat Fields

Time-dependent and phenology-based erodibility assessments in agricultural areas are extremely important for a more accurate evaluation of erosion. This paper aims to investigate soil factor (RUSLE-K) the “Revised Universal Soil Loss Equation (RUSLE)” model terms phenological seasonal variations 50 different winter wheat growing parcels with interactions other dynamic RUSLE factors (RUSLE-R, RUSLE-C). For that, parcel-based erosion were performed help Dynamic Erosion Model Monitoring System, digital elevation model, satellite images Polatlı, Ankara. Findings showed that RUSLE-K varied from 0.0150 0.0357 t ha h ha-1 MJ-1 mm-1 during period seeding germination end tillering autumn spring, lowest was obtained when plant three-leaf stage. After frost-free period, corresponding flowering fertilization stages plant, values changed between 0.0786 0.0976 mm-1. reveals can vary up nine times due seasonality. However, not taken into consideration. Considering all on losses, change coefficients highest RUSLE-R, RUSLE-C, respectively. These changes caused losses by 82% year. So, this study is expected shed new light studies or commonly cultivated crops accurately assess water risk as significant land degradation problem.