Compare two effects of continuous tillage and permanent grassland on the soil organic matter content - Leaving Cert Agricultural Science - Question ii - 2021

Continuous Tillage Effect: Continuous tillage typically leads to decreased organic matter in the soil. The frequent disturbance of the soil structure leads to the oxidation and breakdown of organic materials, thereby reducing the overall organic content.

Permanent Grassland Effect: In contrast, permanent grassland tends to increase the organic matter content in the soil. The presence of grass roots and other vegetation contributes to the accumulation of organic residues, while the deep root system also aids in the formation of stable organic matter through the natural recycling processes in the ecosystem.