Warranty-K enters the plant through the stomatal opening and is translocatedinto the plant system through the vascular bundles. Helps plants overcomedrought stress; improves winter hardiness; increased disease resistance;improves the rigidity of stalks; leaches from soil; mobile in plant.

Under potassium stress condition, yellowing of leaves starts from the tips ormargins of leaves extending towards the center of leaf base. The yellowing is
interveinal and irregular in the leaves of tomato and blueberry. These yellowparts become necrotic (dead spots) with leaf curling in tobacco; sugar maple;
sapota and sugarcane. There is a sharp difference between green, yellow andnecrotic parts.

In excess; causes N deficiency in plant and may affect the uptake of otherpositive ions such as Mg and Ca.

High N / low K favors vegetative growth; low N / high K promotes reproductivegrowth (flower, fruit); calcium excess impedes uptake of potassium.