The importance of calcium (Ca): it is an integral part of the cell wall, it acts on the permeability of the cell membrane.
It acts on the growth and germination of pollen grains. It acts on the growth of the pollen tube. Essential for the growth and deepening of roots. Calcium (Ca) deficiency causes reduced growth of meristematic tissue in the stem, leaf and root tip.
Deficiency usually appears first on young leaves and growth points, a consequence of calcium immobility in the plant. The emergence of primary leaves of calcium deficient soybeans is slow and when the leaves emerge they already grow deformed (wrinkled leaves).