The interpretation of DRIS index is the identification of nutrients that are limiting the crop yield from the presenting in nutritionally balanced or non-limiting. DRIS index can provide all null values or null values, positive and negative. However, the probability of having all zero values is small, therefore, it is necessary that all dual ratios show the same mean value of the standards. What happens under the conditions of analysis with the DRIS system is the presence of null values, positive and negative (Beaufils, 1973).

nutrient is in a state of nutritional balance (Walworth & Sumner, 1984). After determination of DRIS index is necessary to interpretate these positive and negative values of a particular nutrient, it would be a situation in which the nutrient would be in excess (+) or deficiency (-).