Vol. 11, Issue 10 (2022)

In Karnataka, jackfruit, which was mostly regarded wild and not grown as a crop, has found some takers. Less information was known about the nutrient requirements of jackfruits, and conventional nutrient management is usually based on experience. As a result, an attempt was conducted in this study to standardize the leaf collection procedure and the appropriate range of leaf nutrient contents for determining jackfruit nutrient status. Factors such as canopy height, leaf age and time of sampling were considered while sampling. These factors will have an impact on the results. The results showed that the level of nutrient concentrations was stable from 3-6 months old leaves from central canopy. During April to June, the months was most consistent. It was advised that the stable intra-canopy and stable period of nutrient concentrations could be used as the standards for leaf sampling technique. Based on the leaf sampling technique, the standard of leaf nutrient concentrations was summarized and could be used as the standard for nutrient suitability evaluation.