Leaf and soil nutrient status in relation to yield of mango

In the surveyed mango orchards year-wise and orchard to orchard variations in soil and leaf nutrients were observed. Leaf N varied significantly between the high and low yielding orchards. Leaf N, P and K contents were above the critical limits in both high and low yielding orchards. However, high yielding orchards showed higher leaf N, P and K contents. Fruit yield had significant correlation with leaf N before and during flowering, leaf P after harvest, leaf K before flowering, soil N at pea stage, and soil K before flowering, during flowering and at pea stage of fruits. The results indicated the importance of nitrogen and potassium nutrition in enhancing the productivity of mango orchards. Linear and multi-linear regression equations specified the fruit yield variations accounted for by the leaf and soil nutrients. Leaf nutrient status explained the yield variations better than soil nutrient content.