The importance of calcium (Ca): Fundamental in maintaining the structural integrity of membranes and cell walls, in the process of cell division, in ionic absorption, in pollen grain germination and in pollen tube growth.
The presence in the soil solution is essential for the correct development of cotton roots. Calcium (Ca) deficiency is not common in the field.
Normally, the effects of soil acidity and the deficiency of other nutrients overcome or are expressed faster than the deficiency of this nutrient in the crops. Deficiency is characterized by reduced growth, curvature of leaf margins, petiole collapse, reduced flowering and fruiting, and falling apples.