polyacrylamide effects on infiltration in irrigated agriculture

polyacrylamide effects on infiltration in irrigated agriculture
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  • Does polyacrylamide reduce sediment in irrigation?
  • PAM, used following NRCS guidelines (Interim conservation practice standard—irrigation erosion control (polyacrylamide), 1995, Anionic polyacrylamide (PAM) erosion control (Acre)‐code 450 USDA‐NRCS, NHCP, 2001), reduced sediment in runoff 94% in 3 years of furrow irrigation studies in Idaho (Lentz and Sojka, 1994).
  • What is ionic polyacrylamide (PAM)?
  • Anionic polyacrylamide (PAM) has been sold since 1995 to reduce irrigation‐induced erosion and enhance infiltration.
  • Can polymer irrigation reduce soil erosion?
  • Treating only the furrow bottoms in a light preirrigation with 15–20 kg ha −1 polymer per irrigation, Paganyas (1975) found that soil was stabilized against erosion, reducing losses about 90% across polymer treatments. Net infiltration increased and the infiltrated water moved farther laterally.
  • How effective is PAM treatment in irrigated soil?
  • In surface irrigated situations PAM treatment was equally effective as conservation tillage for controlling soil loss and endosulfan loss in runoff, on the order of 70%. Part of the benefit in both instances was recognized to be the infiltration enhancement of either practice.