What is the minimum amount of crop residue required on the soil surface for conservation tillage according to NRCS guidelines?

The minimum amount of crop residue required on the soil surface for conservation tillage, as outlined by NRCS (Natural Resources Conservation Service) guidelines, is 30%. This guideline is established to promote soil conservation and enhance ecological health. By maintaining at least 30% of crop residue, the soil is better protected against erosion caused by wind and water. Residue helps to improve soil structure, enhance moisture retention, and foster a habitat for beneficial soil organisms. This practice encourages a more sustainable agricultural system, contributing to long-term soil health and productivity.

Maintaining residue at this level supports better nutrient cycling and can contribute to increased yields over time while reducing the need for chemical inputs.