ISHS Acta Horticulturae 119: III International Symposium on Water supply and Irrigation in the open and under Protected Cultivation
ECONOMIZING SANDY SOIL STRUCTURIZATION |
| Authors: | M.Y. Tayel, O.A. El-Hady |
| Abstract:
Sandy soil samples from the Southern Sector of Tahrir Province were wetted to different moisture contents and the formed aggregates were air dried. The optimal moisture content for aggregate formation corresponded to about 60% of the soil water holding capacity, being 14% (on dry soil weight). Although, the above mentioned moisture level increased soil aggregates, they were unstable. When sandy soil was prewetted (initial moisture content is 5 – 10%) and then mixed with Polyvinyl acetate butyl acrylate emulsion (Curasol AH) so that the final amount of moisture added to the soil also corresponded to 60% of the soil water holding capacity, the highest aggregate stability was obtained. The relations between anyone of aggregate size distribution and aggregate stability (as indicated by the SI and MWD) from one side and the application rate and both the initial and final soil moisture content, from the other side, were statistically significant. Conditioning the soil at its optimal initial and final moisture content can cut down the amount of Curasol AH required. | |
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