Every crop or plant require different nutrients and in different quantities at different stages of its life cycle. The farmer needs to take decision on this after carefully carrying out a thoughtful exercise. The soil and water itself have nutrients available and therefore it is cost economic first to have proper soil and water testing done, analyzed and evaluated, and, then only make only the required addition of fertilizers to bring up total content of nutrient up to mark for the particular crop or plant. It is very important to have proper soil and water analysis done.