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The Effect of a Synthetic Soil Conditioner (HPAN) on Intake, Runoff, and Erosion¹

ABSTRACT

Five plots were established to determine the effect of a soil conditioner (HPAN)³ at three rates of application on rainfall intake, runoff, and erosion. The plots were on Sharpsburg silty clay loam having a slope of 8.5%. The results obtained over a period of 30 months indicate that HPAN has increased the size of soil aggregates and has increased intake and reduced runoff and erosion as compared with untreated soil. A straw mulch applied at the rate of 2.5 tons per acre was more effective in reducing runoff and erosion than any of the HPAN treatments.

¹ Soil Conservation Service Research Branch, A.R.S., U.S.D.A.; and the University of Nebraska, Lincoln, Nebr., cooperating. Published with the approval of the Director of the Nebraska Agr. Exp. Sta. as Jour. Ser. paper No. 631.

² Project Supervisor of Research.

³ HPAN is an abbreviation for a conditioner known as CRD-189-A. Chemically it is a sodium salt of hydrolyzed polyacrylonitrile. It has been called Krilium-9 by its manufacturers.

Received for publication July 7, 1955.