estores soil structure after natural soil microorganisms have been reduced by the use of chemical fertilizers; compost is a soil innoculant.
Increases earthworm populations in soil.
Provides slow, gradual release of nutrients, reducing loss from contaminated soils.
Reduces water requirements and irrigation.
Provides pportunity for extra income; high quality compost can be sold at a premium price in established markets.
Moves manure to non-traditional markets that do not exist for raw manture.
Brings higher prices for organically grown crops.
Minimizes odors from agricultural areas.
Source: EPA: Compost - New Applications for an Age-Old Technology
Reduces fertilizer requirements.