Using manure

In farm crop production, you can use raw animal manure to enrich soil fertility — i.e., fresh manure not added to a compost process — under specific conditions and restrictions.

What restrictions apply for using manure with crops not destined for human consumption?

There are no restrictions for using manure with crops not for humans.

What restrictions apply for using manure with crops for human consumption?

Manure must be applied at least 120 days before the harvest date if the crop is for human consumption and the edible part touches soil surfaces or particles.

What restrictions apply for using manure with crops for human consumption that do not touch soil surfaces?

Manure must be applied at least 90 days before the harvest date if the crop is for human consumption but the edible part does not touch soil surfaces or particles.

Is livestock grazing near crops for harvest allowed?

Livestock grazing is allowed on certified organic land and follows the same rules for raw manure. Animals must be removed either 90 or 120 days prior to harvest depending on if the edible part of the crop comes into contact with soil or not.

Are there special requirements, besides crop contact (or not) with soil when using off-farm sourced manure?

For off-farm manure, you will need a statement from the supplier for all ingredients — including any additives, bedding, inoculants, anti-caking/flow agents, etc. — to show it doesn’t contain prohibited materials per the National List.