D-Ieaf is a best indicator of nutrient status of

Answer: Option A

D-Leaf is the best indicator of the nutrient status of pineapple.
Pineapple 'D' leaf. The „D‟ leaf is defined as the most recently matured leaf with maximum physiological activity. The leaf is the principal site of plant metabolism, therefore, changes in the nutrient supply are reflected in the composition of the index.
Leaf nutrient analysis is the best diagnostic tool that recommends nutrient application only in direct economic response of the fruit crop. It seems to be the best method for identifying the need for the use of nutrients.
The study indicates the significance of the D leaf for balancing fertilization in pineapple.