Leaching model (soil)

The model may describe the process (1) in time and (2) as a function of amount of water applied.

The salinity of the deeper soil first increases due to the salts leached from the top-soil, but later it also decreases.

In the Tagus delta, Portugal, the leaching efficiency of the dense clay soil was found as low as 0.10 to 0.15.

[4] The soil could not be developed for intensive agriculture and was used for rearing of bulls in coarse natural pasture.

[6] The figure illustrates the calibration process of leaching efficiency, which parameter is difficult to measure directly.

Figure 1. Experimental data of Chacupe pilot area
Figure 2. Principle of leaching efficiency
Figure 3. Leaching curves and calibration of leaching efficiency