calciorgan and the calcium in the soil
Ca2 + is a cation larger than K + and with a double positive charge, which is why it is more strongly retained in the clay-humic complex. This further immobilizes the calcium and prevents it from entering the soil solution to be absorbed by the roots. In addition, when the soil pH is alkaline, the clay-humic complex attracts Ca2 + cations more strongly. calciorgan provides calcium complexed by organic substances of an acid nature, so that:
→ as the soil pH acidifies, the Ca2 + is no longer so strongly retained in the clay-humic complex
→ this produces an increase in the pH gradient, favoring the passage of calcium to the soil solution, where it is absorbed by the roots.