Phosphorus is very much needed for root development. In poor conditions, root development will be affected. It results in a lack of essential nutrients. Symptoms of deficiency will first appear in the old and lower leaves. Older leaves will have brown spots.
Phosphorus is best absorbed from roots in the pH range of 6.5-7.5. So, adjust the pH in acidic soil by adding lime/dolomite. Add biofertilizer’s containing phosphorus-soluble bacteria to organic manure to increase phosphorus availability. Check that the recommended amount of fertilizer is applied on time. Excess iron and zinc can also cause phosphorus deficiency symptoms. Go for soil analysis and understand the extent of depletion. According to the soil test reports, apply single superphosphate for immediate accuracy or bone meal or rock phosphate for long term accuracy.
