This often occurs in spring when temperatures remain cool. At pH s above 6.5, may have interaction between P and Ca resulting in a Ca induced P deficiency. More mobile in soil than P, but less than nitrate. Leaf margins may turn brown in K deficient plants. Increased lodging may occur in grain crops.
Deficient plants are less drought tolerant.
In pastures with legumes and grasses, legumes can be expected to suffer more than grasses from low K levels. Potassium deficiency may also allow greater incidence of some diseases. Similar to K for most Alabama soils. May exhibit purple color similar to P. Deficiencies occur most readily on sandy, low CEC soils. Similar to Mg.