Generic Materials Search: bark
2 items found.
View the OMRI Generic Materials List Glossary in PDF format here.
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Crop Fertilizers and Soil AmendmentsNonsynthetic
See also PLANTS.
205.203(c)(3) Uncomposted plant materials.
Crop Management Tools and Production AidsNonsynthetic
Includes horn manure spray (500) horn silica (501), yarrow flowers (502), chamomile (503), stinging nettle (504), oak bark (505), dandelion (506), valerian (507), and horsetail (equisetum) spray (508).