Which are essential elements in Coconut nutrition?

Among the basic nutrients, potash (K) is the most important in coconut cultivation, followed by nitrogen. There is a general reaction to the application of K and N; whereas the reaction of phosphorus is observed only in certain limited and local conditions. In secondary nutrients, magnesium and chlorine have beneficial effects, followed by calcium, sulphur and sodium. In micronutrients, Zinc and boron and manganese are required under some limited conditions.