What is the definition of green manure in the context of soil health?

• A. A cover crop grown to enhance fertility and organic matter levels
• B. A fertilizer derived from animal waste
• C. A type of soil amendment made from minerals
• D. A technique for eroding excess nutrients

Answer: (A)

Green manure refers to a type of cover crop that is specifically grown to improve soil fertility and increase organic matter levels. When these crops are tilled back into the soil, they decompose and enrich the soil with nutrients, enhancing its structure, moisture retention, and biological activity. This practice is essential in sustainable agriculture as it not only boosts soil health but also helps prevent erosion and suppress weeds.

The other options, while related to soil amendments, do not capture the essence of green manure as effectively as the correct answer. For instance, fertilizers derived from animal waste and mineral amendments serve different purposes and are not defined as green manure. Additionally, a technique for eroding excess nutrients contradicts the goal of maintaining and improving soil health. The proper use of green manure, therefore, significantly contributes to the sustainability and productivity of agricultural practices by focusing on enhancing the natural soil ecosystem.