Where the plants that suffer from lack of a specific food component, distinguishing features that enable the person to identify the lack of this element, but the plant may suffer from the lack of several elements at one time mixed these signs and difficult to distinguish, and sometimes show similar signs as a result of the injury of the plant pests or And in this case it is necessary to analyze the plant tissues to clarify these things, and these may appear in the late life of the plant, which makes the benefit of treatment at the time is small.