Linking Soil Properties to Grain Quality: Individual and Combined Effects of Rice Husk Biochar and Potassium Humate in Paddy Rice Systems
The integrated effects of biochar and humate on soil nutrient status, shoot nutrient accumulation, and grain composition and quality remain underexplored. This field study evaluated four treatments—control, rice husk biochar (RHB; 15 t/ha), potassium humate (KH; 6.3 kg/ha), and RHB + KH—on soil properties, shoot nutrie...