Effects of temperature and soil pH on effectiveness of four zinc fertilizers

Abstract

Abstract Corn plants were grown in a growth chamber on two soil types that had been treated with one of four zinc forms; ZnO, ZnSO4, ZnEDTA, and Zn‐Reax, and incubated at two temperatures. Two growth temperatures for corn were superimposed on the two soil‐incubation temperatures. Under low soil‐incubation temperature and low growing temperature conditions, organic Zn materials tended to supply more Zn to the plants on the acid soil. Higher growth temperatures reduced that effect. Inorganic Zn sources were more effective at the higher growing temperatures on an acid soil. The organic Zn sources were slightly more effective than inorganic forms on calcareous soils under the same growing conditions.