Ashburn, GA, (very close to Heaven!) | I am going to talk from a south Georgia, coastal plains, sandy soil perspective on cotton, corn, soybeans, peanuts, and wheat. What works in your part of the country on your crops will differ.
Calcium and Magnesium preferred sources are lime, second choices, depending on pH and availability, 0-0-022-22S-11Mg K-Mag for magnesium and gypsum for calcium. Gypsum also supplies sulfur.
Sulfur is usually preferred as 12-0-0-26S Ammonium Thiosulfate, blended with either 32% or 19% liquid nitrogen. We also use K-Mag in some blends to balance out some sulfur and magnesium, somewhere between 50 and 100 pounds per acre.
As for micros, zinc, either 21% or 36% is about the only thing I like to include in blends. Sometimes we may add manganese. Our preferred delivery means of manganese is through adding to starter fertilizer, as some of our soils get a little high in pH (>6.5) and we may see a response. We use a lot of boron, but the most efficient way of getting it out is through foliar applications, either adding it to an early fungicide application on peanuts, similar timing on soybeans, or to Pix on cotton.
Molybdenum is something we add to soybean innoculant. Where pH is 6.5, it's optional.
Our soils naturally have sufficient levels of iron. Some vegetable guys add copper, but foliar is probably a better delivery method. |
Macronutrients & Micronutrients
