The importance of sulfur (S): Components of sulfur amino acids (cystine, cysteine and methionine).
Increases the efficiency of FBN (Biological Nitrogen Fixation). Improves incorporation of fixed N. It acts in the formation of grains. Sulfur (S) deficiency is very similar to nitrogen deficiency.
There is a general chlorosis of the leaves, including the veins, which turn from pale green to yellow. Symptoms start on young leaves, while in N deficiency symptoms start on old leaves. Deficient plants are small and thin-stemmed. The analysis of plant leaves can also be a useful tool in identifying the deficiency.