TITLE:
A Practical Model for Desodification of Saline-Sodic Soils of Central Khuzestan Plains, Khuzestan Province
AUTHORS:
Aslan Egdernezhad, Heydar Ali Kashkuli, Ebrahim Pazira, Hossein Sedghi
KEYWORDS:
Desodification Curve, Saline-Sodic Soils, Salt Leaching, Modeling
JOURNAL NAME:
Open Journal of Geology,
Vol.6 No.8,
August
8,
2016
ABSTRACT: The most important task in leaching practices is assessment of water
quantity required for leaching of saline and saline-sodic soils. Therefore,
reliable estimation of the required leaching water quantity is vital for
reducing soil salinity to a desirable level. The present study aimed to investigate
desodification of saline and sodic soils in central area of Khuzestan Province.
Consequently, a large area of 3216 ha with S4A3 salinity/sodicity class in
Khuzestan, Iran, was selected to obtain the required data. This experiment was
conducted with two treatments and tree replicates. In the first treatment, the
experiment was conducted by applying just 100 cm water depth in four 25 cm
intervals. In the second treatment, 5000 kg/ha Sulfuric Acid was applied prior
to salt leaching together with leaching water. The intermittent ponding method
was conducted with double rings in a rectangular array. The required physical
and chemical analyses were performed on the collected data. The leaching water
was supplied from Shotait River. Four mathematical models were applied to the
collected experimental data to derive a suitable empirical model. The results
for large scale applications indicated that the proposed logarithmic model can
estimate the capital leaching requirement much than the previously proposed
models.