Your search found 6 records
1 Rengasamy, P.; Olsson, K. A. 1993. Irrigation and sodicity. Australian Journal of Soil Research, 31:821-837.
(Location: IWMI-HQ Call no: P 3377 Record No: H014193)
The productivity of irrigated agriculture in Australia is low for most crops and one important factor is the physical and chemical constraints caused by sodicity in the rootzone. Over 80% of the irrigated soils are sodic and have degraded structure limiting water and gas transport and root growth. Irrigation, without appropriate drainage, leads to the buildup of salts in soil solutions with increased sodium absorption ratio (SAR) and can develop perched watertables due to a very low leaching fraction of the soil layers exacerbated by sodicity. Therefore, irrigation management in Australia is closely linked with the management of soil sodicity. The inevitable consequence of continued irrigation of crops and pastures with saline-sodic water without careful management is the further sodification of soil layers and concentration of salt in the rootzone. This will increase the possibility of dissolving toxic elements from soil minerals. The yields of crops can be far below the potential yields determined by climate. The cost of continued use of amendments and fertilizers to maintain normal yields will increase under saline-sodic irrigation. Most of the irrigated soils in Australia need reclamation of sodicity of soil layers at least in the rootzone. The management of these sodic soils involves the application of gypsum, suitable tillage and the maintenance of structure by the buildup of organic matter and biological activity over time. The artificial drainage, an essential component of the management of irrigated sodic soils, is possible. By following these soil management practices, irrigated agriculture in Australia will become sustainable with increased yields and high economic returns.
2 Ragusa, S. R.; de Zoysa, D. S.; Rengasamy, P.. 1994. The effect of microorganisms, salinity and turbidity on hydraulic conductivity of irrigation channel soil. Irrigation Science, 15(4):159-166.
(Location: IWMI-HQ Call no: PER Record No: H015696)
3 Barzegar, A. R.; Oades, J. M.; Rengasamy, P.; Giles, L. 1994. Effect of sodicity and salinity on disaggregation and tensile strength of an Alfisol under different cropping systems. Soil and Tillage Research, 32:329-345.
(Location: IWMI-HQ Call no: P 3807 Record No: H016542)
4 Rengasamy, P.; McLeod, A. J.; Ragusa, S. R. 1996. Effects of dispersible soil clay and algae on seepage prevention from small dams. Agricultural Water Management, 29(2):117-127.
Soil properties ; Clay soils ; Sodic soils ; Dams ; Seepage loss ; Measurement ; Aquatic weeds / Australia
(Location: IWMI-HQ Call no: PER Record No: H017786)
5 Naidu, R.; Sumner, M. E.; Rengasamy, P.. (Eds.) 1995. Australian sodic soils: Distribution, properties and management. East Melbourne, Victoria, Australia: CSIRO. viii, 351p.
Soil properties ; Sodic soils ; Soil classification ; Soil management ; Minerals ; Vertisols ; Soil water ; Wheat ; Environmental effects ; Reservoirs ; Salinity ; Irrigated farming ; Clay soils ; Drainage ; Leaching ; Erosion ; Conferences / Australia
(Location: IWMI-HQ Call no: 631.42 G922 NAI Record No: H017959)
6 Rengasamy, P.; Olsson, K. A. 1995. Irrigation and sodicity: An overview. In Naidu, R.; Sumner, M. E.; Rengasamy, P. (Eds.), Australian sodic soils: Distribution, properties and management. East Melbourne, Victoria, Australia: CSIRO. pp.195-203.
Soil properties ; Sodic soils ; Soil management ; Irrigated farming ; Plant growth ; Crop yield ; Irrigation water ; Groundwater ; Drainage ; Leaching / Australia
(Location: IWMI-HQ Call no: 631.42 G922 NAI Record No: H017962)
Powered by DB/Text WebPublisher, from
