Generic Materials Search: products, zinc

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View the OMRI Generic Materials List Glossary in PDF format here.
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Iron Products
Allowed with Restrictions
Crop Fertilizers and Soil Amendments
Synthetic
Ferric oxide, ferric sulfate, ferrous sulfate, iron citrate, iron sulfate, or iron tartrate may be used to correct documented deficiencies of iron. See MICRONUTRIENTS – SYNTHETIC listings.
205.601(j)(6)(ii) Micronutrients—not to be used as a defoliant, herbicide, or desiccant. Those made from nitrates or chlorides are not allowed. Soil deficiency must be documented by testing. (ii) sulfates, carbonates, oxides, or silicates of zinc, copper, iron, manganese, molybdenum, selenium, and cobalt.
Micronutrients – synthetic
Allowed with Restrictions
Crop Fertilizers and Soil Amendments
Synthetic
Use restricted to cases where soil/plant nutrient deficiency is documented by soil or tissue testing. Micronutrients include: boron, cobalt, copper, iron, manganese, molybdenum, selenium, and zinc. Carriers, fillers, chelating agents, and complexing agents must either be nonsynthetic, or must be on the list of allowed synthetics. See other MICRONUTRIENTS – SYNTHETIC listings, and TRACE MINERALS – NONSYNTHETIC.
205.601(j)(6) As plant or soil amendments… Micronutrients—not to be used as a defoliant, herbicide, or desiccant. Those made from nitrates or chlorides are not allowed. Soil deficiency must be documented by testing. (i) Soluble boron products (ii) Sulfates, carbonates, oxides, or silicates of zinc, copper, iron, manganese, molybdenum, selenium, and cobalt.
Zinc Products
Allowed with Restrictions
Crop Fertilizers and Soil Amendments
Synthetic
Zinc carbonate, zinc oxide, zinc silicate, and zinc sulfate may be used to correct a documented zinc deficiency. See also MICRONUTRIENTS – SYNTHETIC listings.
205.601(j)(6)(ii) As plant or soil amendments… Micronutrients—not to be used as a defoliant, herbicide, or desiccant. Those made from nitrates or chlorides are not allowed. Soil deficiency must be documented by testing.
Zinc Products
Prohibited
Crop Fertilizers and Soil Amendments
Synthetic
Zinc ammonium sulfate, zinc chloride, and zinc nitrate are prohibited. See also MICRONUTRIENTS – SYNTHETIC listings and ZINC PRODUCTS.
205.105(a)