Potassium

Deficiency Symptoms :

Yellowish spots in the margins of new leaves which later spread over the leaf surface and subsequently turned brown, starting with the older leaves. Plants were stunted, hard and chlorotic. Leaves first become grey at the margin and later interveinally. The tips and margins underwent scorching and turned upwards K deficiency symptoms appeared first in the oldest leaves. Leaves remained small and plant growth restricted. Chlorosis and necrosis then spread to younger leaves with defoliation of yellowed and curled older leaves.

Foliar spray of K₂SO₄ 1% thrice at weekly interval.