5 ml = 1 teaspoon.
15 ml = 1 tablespoon (3 teaspoons).
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Potassium Nitrate (Nitrate of Potash)
All of the N is in the nitrate form.
Micronutrient values may show a zero value for missing data. Over time the dataset will improve, but keep in mind that in some instances; especially with natural materials, the listed values given are rough estimates and will vary with samples from different sources.