Cation Exchange Modelling

The cation exchange capacity (CEC) is the capacity of the soil to retain, adsorb and exchange cations. This capacity is variable depending on the organic matter content, pHThe intensity of exchange for similar exchange capacities varies according to the composition, texture, etc., and for similar exchange capacities, the intensity of exchange varies according to the composition. water chemistry that passes through the different horizons and the pore water it encounters on its way, because the exchange takes place in order to reach a chemical equilibrium between the soil pore water and the irrigation water. In other words, the greater the difference between the two waters, the greater the exchange. Thus, for similar cation exchange capacities in a soil profileIn the shallower horizons there is a more intense exchange than in the lower horizons because the differences between these waters are greater; in the lower horizon the irrigation water has already begun to equilibrate with the pore water of the upper horizon and therefore the differences between the two waters decrease as the depth increases, and so does the cation exchange.

The intensity of cation exchange of the different soil horizons is a function of the chemical differences between the soil pore water and the irrigation water that penetrates the soil.

The modelling of these phenomena can be done by means of hydrogeological software applied to sports surfacestaking into account the chemical analysis of irrigation water and soil. Thus, Tiloom offers modelling of the cation exchange that can occur in different soils irrigated with different waters, even modelling temperature or CO2 production rates in different seasons of the year.

See figure for an example of modelling two different soil profiles at a temperature of 8 °C (profile A from 0 to 10 cm and profile B from 10 to 20 cm, both with an edaphic atmosphere of 1% in the content of Soil CO2.

It is possible to quantify the exchange that takes place (a total of 10 times more milliequivalents/kg of soil in the upper horizon than in the lower horizon in this particular case), as well as to know which cations are adsorbed or desorbed.

Therefore, depending on the different irrigation waters and the nutritional or saline content of the soil, the exchanges vary and can even be reversed in the different soil profiles.

If you know exactly what is happening on your floor, you will be able to treat it correctly. Leave nothing to improvisation. Call Tiloom now and you'll make your agronomic management notably.