Effect of Different Doses of Nitrogen, Phosphorus and Potash Application on Physico-chemical Characteristics of Guava (Psidium guajava L.) cv. Allahabad Safeda

The present experiment entitled effect of different doses of nitrogen, phosphorus and potash application on physico-chemical characteristics of Guava (Psidium guajava L.) cultivar Allahabad Safeda was conducted on 12 year old guava trees at Research Orchard/Farm, Department of Horticulture, Allahabad Agricultural Institute-Deemed University Allahabad. The NPK were applied in the form of ammonium sulphate, single supper phosphate and muriate of potash. Experiment was laid out in a randomized block design with four treatments consisting of T₀-control (no. application of A.S, S.S.P and MOP), T₁ (A.S: S.S.P: MOP @ 860:440:440 g/tree), T₂ (A.S: S.S.P: MOP @ 720:360:360 g/tree) and T₃ (A.S: S.S.P: MOP @ 600:280:280 g/tree). The maximum fruit length (6.4cm), diameter (6.98cm), weight (173.36g), volume (160.0ml), specific gravity (1.085), TSS (12.0%), total sugar (9.20%) and ascorbic acid (206.08 mg/100ml juice) was recorded with treatment T₁ (A.S:S.S.P: MOP @ 860:440:440 g/tree, as far as acidity of guava is concerned, the treatment T0 (Control- no application of NPK) recorded maximum acidity (1.77%).