Norton, L.D.
Shainberg, I.
King, K.W.

In this study, three soils representing major land-use resource areas were studied to determine their infiltration behavior with time during rainfall and interrill erosion. Small erosion pans in the laboratory were used under rainfall simulation at slopes of 5 and 30%. Phosphogypsum treatments improved rain infiltration and reduced interrill erosion. Two sulfitic materials from coal desulfurization were less effective than phosphogypsum in reducing runoff and erosion. One by-product consisting of almost pure gypsum was even more effective. The beneficial effect of gypsiferous materials on reducing erosion was less pronounced at the 30% slope. It was concluded that the increased electrolyte content of the eroding water from gypsiferous materials was responsible for the decrease in erosion and surface sealing in these humid region soils. -from Authors