Modeling the Corn Residue Coverage after Harvesting and before Sowing in Northeast China by Random Forest and Soil Texture Zoning

Crop residue cover is vital for reducing soil erosion and improving fertility, which an important way of conserving tillage to protect the black in Northeast China. How much crop covers on cropland significance protection. Landsat-8 Sentinel-2 images were used estimate corn coverage (CRC) China this study. The estimation model CRC was established accuracy by optimal combination spectral indices textural features, based texture zoning, using random forest regression method. Our results revealed that (1) optimization C5 features improves after harvesting before sowing with determination coefficients (R2) 0.78 0.73, respectively; (2) R2 0.81 0.77, (3) considering spatial heterogeneity background usage zoning models increase 0.84 0.81, respectively. In general, better than sowing. most study area 0.3 0.6 mainly distributed Songnen Plain. By estimated results, implementation conservation practices identified, protecting