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Phosphorus
Deficiency Symptoms
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Reduction in growth and a fading of green in the leaves.
Leaves assume an ash-geen colour, with some yellow appearing before they became necrotic at the margins and tips. Leaves shrivel, turn light brown, dry out and remain on the plant. The root systems are very sparse and show considerable dying. The roots, stems and leaves closely resemble vanilla plants dying of root rot
Corrective Measure:
Apply organic manure during May-June on surface layer of soil. Apply 120 g of N in the form of leaf mould or FYM (at least 12 kg) in two split doses in June-July and September-October. application of 40-60 g of nitrogen, 20-30 g of phosphorus and 60-100 g of potashto each vine per year besides organic manures such as vermicompost, oil cakes, poultry manure, wood ash, etc.
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