Abstract
This study examined the leaching requirement of three saline-sodic soils in polyvinyl chloride (PVC) columns of 50 cm long and 11 cm internal diameter. Air-dried soils were packed in PVC lysimeters receiving different pore volume (PV) of water (EC 0.89 dS m-1 , SAR 1.55, RSC 1.02 mmolc L -1 ). Leaching with 2.5 PV of water removed 94 % of soluble salts and decreased ECe from 33.9 to 5.9 dS m-1 in 0-25 cm layer of sandy clay loam soil. For lowering ECe to < 4 dS m-1 in loamy sand up to 0-25 cm soil layer, 2.0 PV water removed 67 % soluble salts. In silty clay loam soil, 2.5 PV water lowered ECe to < 4 dS m-1 only up to 0-10 cm depth with 83 % removal of salts. Relationships between EC/EC0 and Dw/Ds established were for the soils as EC/EC0 = 0.329 (Dw/Ds) -2.12 with r= 0.87 for loamy sand; EC/EC0 = 0.167 (Dw/Ds) -0.60 with r=0.89 for silty clay loam and EC/EC0 = 0.06 (Dw/Ds) 0.78 with r=0.98 for sandy clay loam soil. These relationships leads to conclude that reduction in salinity of loamy sand, silty clay loam and sandy clay loam soil was 67, 83 and 94 % when leached with 1.88, 2.72 and 2.67 cm of water, respectively.

Umad Zafar Kahlon, Ghulam Murtaza, Behzad Murtaza, Amjad Hussain. (2013) Differential Response Of Soil Texture For Leaching Of Salts Receiving Different Pore Volumes Of Water In Saline-sodic Soil Column, , Volume-50, Issue-2.
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