When applied with leafspot sprays, it should be included in the first broadcast application. The most common source of boron is Solubor. Solubor, as its name suggests, is a water-soluble boron solution. It contains 20 percent boron. Zinc Zinc application to peanuts has not been shown to increase yields or grades.
Zinc deficiency is associated with high soil pH and high available phosphorus levels.
These conditions do not generally exist in the peanut belt of Alabama. There may be lesions at the base of the plant, limb splitting, and premature dying of plant tissue. An effective liming program may reduce zinc uptake and stunting but will not change the level of zinc in the soil. Zinc toxicity will more likely be diagnosed on peanuts grown on sandy soils rather than on clayey soils. Chlorine Chlorine is an essential element for plant production, but chlorine deficiency has not been described for peanuts.