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Effect of Liquid and Dry PAM Applications on Sediment Concentration in Surface Runoff from Furrow-irrigated Fields

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  21st Century Watershed Technology: Improving Water Quality and Environment Conference Proceedings, 29 March - 3 April 2008, Concepcion, Chile  701P0208cd.(doi:10.13031/2013.24317)
Authors:   Blaine Hanson, Allan Fulton, Rachael Long, Don Weston
Keywords:   PAM, irrigation, furrow irrigation, infiltration, polyacrylamide

The effect of both liquid (oil-based (37% PAM) and water-based (25% PAM) formulations) and dry PAM (granules and tablets) on sediment concentration of surface runoff during furrow irrigation was investigated on loam and clay loam soils. Liquid PAM was highly effective in reducing the sediment load. Granules/tablets placed 45 m or 90 m from the head of the furrow were also effective, but, dry material placed at the head of the furrow were covered up with sediment and had no effect on sediment concentration. Sediment concentrations at the start of surface runoff were higher for the granules/tablets compared to the liquid PAM applications, but similar sediment concentrations occurred several hours after the start of runoff. PAM had no effect of infiltration.

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