Here is a real problem with incorrect fertilizer use wrt identifying the correct limiting factor. If P is the limiting factor but you add lots of N it will build up and when you finally add (or the water gets by whatever means) the P , thus removing the limiting factor , the water will have the mother of all blooms (way to much) with all its problems. It is critical to know what the limiting factor is prior to adding stuff. No guessing on this topic.