Actually, the application of fertilizers should be followed immediately after the results of the soil health tests where we can be aware of how much to add, this will help to avoid guesswork also to protect the environment from excess fertilizers. In addition to that, is to improve nutrional balance of the soil for optimal crop production. Further more, is to save money and energy by applying only the amount of fertilizer needed to produce the highest yield possible for your farm. Conlusion, we first need to do a soil test so as we can come up with a strong recommendation on how much based on the specific field.