| Abstract: | Abstract Diagnosis and Recommendation Integrated System (DRIS) indices were developed to identify and prioritize the yield‐limiting nutrients in mango orchards (cv. Baneshan) in Andhra Pradesh, India. The forms of expressions selected for computing the DRIS indices varied from the young (<20 years old) to aged (>20 years old) trees. The DRIS indices could reflect the long‐term variations of different doses of nitrogen (N), phosphorus (P), and potassium (K) application in mango, thereby showing the sensitivity of the newly developed DRIS indices to fertilization practices. The nutrients identified as yield limiting by DRIS indices were observed to be not totally independent of the age of sampled tissue. The same nutrient was observed to be most yield limiting in 24.2% of sampled trees after a gap of 3 months. Similarly, the same nutrient was identified as one of the first two yield‐limiting nutrients in 52.2% of sampled trees. The validity of the newly developed DRIS indices was tested by applying two of the most yield‐limiting nutrients in 88 and 46 cases of young and aged trees. The yield‐limitation due to individual nutrients was either totally eliminated or changed in ranking in 96.0 and 93.5% of the young and aged trees, respectively, after the application of yield‐limiting nutrients, as indicated by the newly developed DRIS indices. The increase in the fruit yield with the application of yield‐limiting nutrients identified by the DRIS indices varied from 11.5 to 45.9% in young trees and from 15.2 to 34.0% in aged trees over the control. |
