Magnesium Recommendation Codes.

Code 1.

If magnesium is low and lime is recommended, both soil acidity and low magnesium can be corrected by applying dolomitic lime at the recommended rate.

If magnesium is low and lime is not recommended, no magnesium is required. (These crops have not been shown to respond to magnesium.)

Code 2.

If magnesium is low and lime is recommended, both soil acidity and low magnesium can be corrected by applying dolomitic lime at the recommended rate.

If magnesium is low and lime is not recommended, low magnesium may be corrected by applying 25 pounds per acre of Mg as magnesium sulfate, magnesium oxide, or sulfate of potash-magnesium; or if the pH is 6.5 or below by applying 1,000 pounds per acre of dolomitic limestone (cotton, vegetable crops, and orchards).

Code 3.

If magnesium is low and lime is recommended, both soil acidity and low magnesium can be corrected by applying dolomitic lime at the recommended rate.

If lime is not recommended and Mg is low, low magnesium may be corrected by applying 25 pounds per acre of Mg as magnesium sulfate, magnesium oxide, or sulfate of potash-magnesium. Potatoes, blueberries, pines, and tobacco have a high Mg requirement but are sensitive to high pH.