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| Authors: | O.A. El-Hady, M.Y. Tayel, F.M. Abed |
Abstract:
The effect of application rates of bituminous emulsion, PVAc and PAM on water evaporation from sandy, sandy loam and calcareous soils was studied.
Results reveal the following facts:
- The effect of conditioners on the rate of evaporation, cumulative evaporation, and water retention varies with conditioner type, rate of application and the conditioned soil.
- The rate of evaporation from the conditioned sandy soil decreased with increasing the amount of conditioners used.
Therefore, a correspondence decrease in cumulative evaporation and an increase in water retained in the soil were noticed.
The effect of soil conditioners could be arranged in the following order: PVAc ≥ bitumen > PAM.
- Sandy loam soil is highly responsible to small additions of bituminous emulsion and PVAc regarding the decrease in the evaporation rate and the increase in water retention.
PAM is not a practical mean for reducing evaporation in sandy loam soil.
- The calcareous soil was the least affected with the addition of bituminous emulsion and PVAc, but it was more effected with PAM than the sandy loam soil.
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