Adding compost to soil improves its structure by neutralizing pH and increasing cation exchange capacity. Compost also increases the soil's nutrient content as organisms help break down organic matter. Using compost enhances the soil's ability to retain water due to higher organic content, reducing erosion and allowing the soil to hold 16,000 more gallons per 1% organic material. Compost further benefits plants by warding off diseases and producing fewer pest problems while acting as a natural fertilizer.