Potassium is a highly active element in plants. Therefore, deficiency symptoms will first appear in the old and lower leaves. Symptoms begin as white, yellow, or orange chlorotic spots or stripes on older leaves, beginning with leaf tips and margins. In some cases, irregularly distributed chlorotic spots appear, but in all cases, the symptoms begin at the tip of the leaf. The base of the leaf is dark green color. It is followed by the browning of the leaf margins and necrosis.
The maximum availability of potassium is above soil pH 6.0. So, correct the pH of the soil by adding lime/dolomite to the acidic soil. Add organic matter and wood ash to the soil. Apply organic fertilizer containing potash activating bacteria to remove irreplaceable potassium from the soil. Check that the recommended amount of potash fertilizer is applied on time. Go for soil analysis and understand the extent of depletion. Then, apply Muriate of Potash (MOP) as per soil test report. A split application is more beneficial. As an immediate solution, apply sulfate of potash (SOP) with foliar spray (10 grams per liter of water) in the morning with moisturizing agents.
