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A laboratory study of the effects of water dissolved gypsum application on hydraulic conductivity of saline-sodic soil under intermittent ponding conditions
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2005
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IJAFR 44p297.pdf
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U. Sahin and O. Anapali. A laboratory study of the effects of water dissolved gypsum application on hydraulic conductivity of saline-sodic soil under intermittent ponding conditions. Irish Journal of Agricultural and Food Research, 2005, 44, 297–303
Abstract
Reclamation of saline-sodic soils has great importance in agricultural management.
The objective of this study was to evaluate the effectiveness of the methods used to
apply water and gypsum on hydraulic conductivity of a saline-sodic soil with an electrical
conductivity of 28 dS/m and exchangeable sodium percentage of 46%. The experiment
was conducted under laboratory conditions using disturbed and non-cropped
soil columns. A total of 45 cm of water was applied to each column with 3, 6, or 9 separate
water applications. Finely ground gypsum (< 0.5 mm maximum particle diameter)
was either incorporated into the surface 2 to 3 cm of soil or was dissolved into
the leaching water at a rate corresponding to 3.82 t/ha. Six or nine separate water
applications of gypsum dissolved into leaching water significantly increased hydraulic
conductivity (P < 0.01). Soil hydraulic conductivity increased (P < 0.01) with depth
at separate applications of gypsum.