This document discusses the symptoms and correction measures for various physiological disorders in chekko trees caused by deficiencies of different nutrients. It describes the symptoms of deficiencies in nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, boron, copper, iron, manganese, and zinc. The correction measures involve foliar sprays or soil applications of compounds containing the deficient nutrient, such as urea, DAP, KCl, dolomite, CaSO4, borax, CuSO4, FeSO4, MnSO4, and ZnSO4.