How much compost should be added to soils with less than six percent organic matter in the top six inches?

In improving soils with less than six percent organic matter, adding compost is essential for enhancing soil structure, nutrient availability, and microbial activity. The correct amount of compost to add is four cubic yards per 1,000 square feet. This quantity is based on the recommended practice for significantly increasing organic matter content in the soil while ensuring that it does not overwhelm the existing soil composition.

Adding this specific amount enables sufficient microbial and earthworm activity to facilitate the breakdown of the compost over time while contributing to the overall health of the soil ecosystem. It helps improve moisture retention and aeration, both of which are critical for plant health.

Other amounts imply either under-representation or over-application of compost, which might not yield optimal soil improvement. Thus, using four cubic yards strikes a balance, providing a substantial organic matter boost without the risk of nutrient leaching or imbalances that could arise from excessive application.