Co-Authors:
Agassi, M., Soil Erosion Research Station, Israel
Shainberg, I., Institute of Soils and Water, ARO, The Volcani Center, Bet Dagan, Israel
Morin, J., Soil Erosion Research Station, Israel
Abstract:
The efficiency of application of different amounts of phosphogypsum (PG) (and the methods of application) in runoff control was tested for 3 years in small field-plots using a portable rainfall simulator and in runoff plots (Wischmeier plots) located in commercial wheat fields. Five t/ha of phosphogypsum spread over the soil surface after sowing the wheat was found to be the most efficient method of application, generally. In loessial soils with ESP's of 3-4 the amounts of runoff in the PG-treated plots were only 15-30% of that of the control. The wheat yield was increased by 25% in the two low-precipitation years. The marginal return for each m3 of water was 2 kg of wheat grain. In the high-precipitation year (150% of the average) the wheat yields in the control and PG-treated plots were the same although runoff was reduced considerably. © 1985.
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