THE LOSS OF SOLUBLE SALTS IN RUNOFF WATER

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Abstract
The total amount of dry salts lost varied from 166.8 pounds from the plot in wheat and clover to 380.1 pounds per acre from the plot which was spaded 4 in. deep in the spring and fallowed throughout the season. Loss from bluegrass sod was 231.9 pounds per acre or 59.76% as much as the amount of solid material lost by erosion. Ca and S were lost in larger amounts than any of the other elements determined. Loss of K was small, but from several plots it amounted to more than would ordinarily be applied in commercial fertilizer. Losses of Mg, Na, and P are too small to be of much practical importance. Surface runoff water is not a great source of N loss. The soluble salts from the fallow plots showed a higher percentage of inorganic material than did the soluble material coming from land carrying a crop.

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