Determination of criteria to identify saline soils that are not suitable for drip irrigation
Myburgh, P A
Howell, C L
Results showed that high mica content of the clay fraction caused clay dispersion at lower than expected SAR values to such an extent that 3-D infiltration of water was reduced. The problem was aggravated when the electrical conductivity of the soil was below 2 dS/m. The infiltration problem was less serious on sandy soils. High silt content and soil bulk density also tended to reduce water infiltration rate. However, clay mineralogical composition, SAR and ECe will be sufficient criteria to identify and quantify infiltration problems. Gypsum application efficiency should be investigated by means of leaching studies on soil columns in the laboratory.
Myburgh, P A. 2002. Project results were presented to grape growers of the Breede River Valley. Presentation at the Winetech Information Day, 4 September, Robertson, South Africa.
Myburgh, P A, Howell, C L, Brink, D. 2002. A field method to determine three dimensional infiltrability of vineyard soils, South African Journal of Plant and Soil, v. 19 (4) (p. 173-177)