What is a common method for ensuring soil's organic matter content is improved?

Limiting tillage is a common method for improving the organic matter content of soil. This practice helps to preserve soil structure and promote the activity of soil organisms, which play a crucial role in the decomposition of organic material and the formation of humus. By reducing the amount of disturbance caused by tillage, more organic residues from previous crops can be left on the soil surface, leading to increased organic matter as these residues break down over time. Additionally, limiting tillage can help retain moisture in the soil and reduce erosion, both of which further contribute to a healthy soil ecosystem that supports organic matter accumulation.

In contrast, using more pesticides can negatively impact soil health by harming beneficial organisms that contribute to organic matter formation. Increasing chemical fertilizer use can provide nutrients, but it does not directly improve organic matter content and can lead to nutrient imbalances in the long term. Foregoing crop rotation can lead to decreased soil fertility and structure, as different crops contribute various forms of organic matter and promote diverse microbial communities. Overall, limiting tillage focuses on enhancing the natural processes that build soil organic matter.