Visual diagnosis is fast method that can provide an indication of the nutritional status of plants during the growing season. It is especially applicable for profitable plant productions (vegetables, flowers) and permanent crops. Farmers who produce on the same field for many years easier notice symptoms of disorders in plant nutrition status and they can be linked to changes in climate conditions and agrotechnical practices, and promptly take appropriate measures. Due to the security and economy of production, to determine fertilizer requirements in addition to visual diagnosis is necessary use the plant tissue analysis. Samples of plant material for analysis shall be taken depending on the stage of growth, related to younger crops whole plants are taken, and for older/permanent crops individual meture parts are collected. The symptoms are cleary seen only if the acute deficiency or excess exists, and visual diagnostic is only the indicator of disorders. Latent (hidden) nitritional disorders can not be visually noticed or perceived so it is often too late for intervention when they occure. Therefore, it is important to timely notice symptoms and carry out the required analysis. For interpretation of the results of plant tissue analysis in our country foreign literature data is still being used. It would be of great importance to conduct research in our environmental conditions and our cultivars, and form a single database, accessible to all producers. This would help in providing decision making system in the implementation of costly agrotehnical measure- fertilization.