Optimization of major nutrients for guava yield and quality under east coastal conditions.

The experiment was laid out with three levels each of nitrogen and potassium (300, 600g and 900 g/tree/year) and, two levels of phosphorus (300g and 600 g/tree/year). All together eighteen treatment combinations with three replications were imposed on well established plants of Allahabad Safeda. Simultaneously, a control was also maintained without application of fertilizers. The experimental results revealed that maximum plant height was recorded due to application of 900 g nitrogen/tree but was at par with 600 g nitrogen/tree. Maximum stem diameter, canopy spread, fruit yield and TSS were recorded due to application of 900 g potassium/tree/year which was at par with 600 g potassium/tree. Higher nitrogen, phosphorus and potassium contents in leaves and fruits were recorded due to application of 900 g N, 600 P and 900 g K/tree/year respectively. Vegetative growth, fruit yield and quality were drastically reduced in control plots due to non-application of fertilizers. It is concluded that 600 g N, 300g P and 600 g K per plant per year is the most appropriate and sustainable dose for getting good growth and yield under hot humid conditions of east coastal region.