Publication Date:
1986-08-01
Description:
Leaching trials were conducted for 2 yr on two irrigated saline-sodic soils with subsurface drains installed at depths of 0.76, 1.22 and 1.68 m. At one site, after 2 yr of leaching, average salinity levels in the 0- to 2.0-m soil depth were reduced to 91, 88 and 74% of original levels with drain depths of 0.76, 1.22 and 1.68 m, respectively. At the other site, where less water was applied, respective salinity levels were 114, 86 and 99% of original levels. Resalinization and resodification of the surface 0.2 m of soil occurred at both sites in the second year, which was a drought year, and were most pronounced with a drain depth of 0.76 m. Relative reductions in salinity, and efficiency of leaching, were lowest for the 0.76-m-depth drains at both sites. Key words: Subsurface drainage, reclamation, soil salinity, leaching
Print ISSN:
0008-4271
Electronic ISSN:
1918-1841
Topics:
Geosciences
,
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Permalink