Agriculture Reference
In-Depth Information
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Liquid fish products. The pH can be adjusted with sulfuric, citric, or phos-
phoric acid. The amount of acid used shall not exceed the minimum
needed to lower the pH to 3.5.
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Vitamins B1, C, and E.
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Sulfurous acid (CAS # 7782-99-2). For on-farm generation of substance
utilizing 99 percent purity elemental sulfur.
NOP-PROHIBITED NONSYNTHETIC MATERIALS
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Ash from manure burning
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Arsenic
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Calcium chloride, natural brine process. Prohibited for use except as a fo-
liar spray to treat a physiological disorder associated with calcium up-
take.
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Lead salts
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Potassium chloride, unless derived from a mined source and applied in a
manner that minimizes chloride accumulation in the soil
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Sodium fluoaluminate (mined)
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Sodium nitrate, unless use is restricted to no more than 20 percent of the
crop's total nitrogen requirement
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Strychnine
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Tobacco dust (nicotine sulfate)
Certification standards allow for the use of many naturally occurring and a
few synthetic materials for crop production. In the following section, we will
cover some common soil amendments and fertilizers used in organic fruit
production. Because organic certification standards vary between Canada
and the United States and some U.S. certifying organizations enforce stricter
rules than the NOP, be sure you know your certifying organization's rules if
