Comparison of field and laboratory measured hydraulic properties of selected diagnostic soil horizons
Abstract
109 words
This study characterised the hydraulic properties of two soil
types in South Africa, Bainsvlei and Tukulu using both field
(instantaneous profile method) and laboratory (desorption
techniques). The results showed that the two approaches well
defined water retention, but variation were observed due to
texture differences. Also, the K-θ relationships predicted from
the θ-h relationships of the soil cores corresponded well with
those determined by the instantaneous profile field method for
water contents. Overall, the instantaneous profile method
appeared attractive when applied to relatively homogeneous soil
profile where one-dimensional vertical flow can be expected
after saturation. However, it is not applicable to stratified soil
profiles with slowly permeable layer .
Keywords
- economic resources
- Hydraulic conductivity
- hygroscopicity
- instantaneous profile method
- Irrigation
- land resources
- layering
- manpower
- RUFORUM;Agricultural Higher Education
- soil chemicophysical properties
- soil management
- soil profiles
- soil properties
- South Africa
- South African soils
- water retention
- wells
Subjects
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