Conclusion

Manure is a valuable resource that should be utilized on organic farms. Raw manure, except where dropped naturally by grazing animals, should be composted prior to application, and all imported sources of manure should be composted before incorporation into certified organic land.

Horticultural growers who have used manure over many years should check their soils with an Albrecht-style laboratory report, to ensure that selective crop removal of nutrients has not left them with high levels of residual potassium. Whereas most soils need organic matter, oversupply of nutrients is a problem in established horticulture districts. Otherwise the use of composted manure remains a vital component of sustainable agriculture systems.

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