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Lentz, R.D., USDA-ARS Soil and Water Management Res Unit, 3793 N.3600 E., Kimberly, ID 83341, USA
Shainberg, I., USDA-ARS Soil and Water Management Res Unit, 3793 N.3600 E., Kimberly, ID 83341, USA
Sojka, R.E., USDA-ARS Soil and Water Management Res Unit, 3793 N.3600 E., Kimberly, ID 83341, USA
Carter, D.L., USDA-ARS Soil and Water Management Res Unit, 3793 N.3600 E., Kimberly, ID 83341, USA
Soil erosion is a serious problem threatening sustainability of agriculture globally and contaminating surface waters. The objective of this study was to determine whether low concentrations of anionic polymers in irrigation water would appreciably reduce irrigation furrow erosion on Portneuf silt loam (coarse-silty, mixed, mesic Durixerollic Calciorthid), a highly erodible soil. The PAM provided better erosion control than the starch copolymer. Efficacy of PAM treatments varied depending on its concentration, duration of furrow exposure, and water flow rate. In the initial (treated) irrigation and at low flow rates, 10 g m-3 PAM reduced mean sediment load by 87% compared with untreated furrows. Residual erosion abatement in a subsequent irrigation, without further addition of PAM, was approximately 50%. The PAM increased net infiltration and promoted greater lateral infiltration. Effective erosion control was achievable for a material cost below $3 ha-1 irrigation-1. -from Authors
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Preventing irrigation furrow erosion with small applications of polymers
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Lentz, R.D., USDA-ARS Soil and Water Management Res Unit, 3793 N.3600 E., Kimberly, ID 83341, USA
Shainberg, I., USDA-ARS Soil and Water Management Res Unit, 3793 N.3600 E., Kimberly, ID 83341, USA
Sojka, R.E., USDA-ARS Soil and Water Management Res Unit, 3793 N.3600 E., Kimberly, ID 83341, USA
Carter, D.L., USDA-ARS Soil and Water Management Res Unit, 3793 N.3600 E., Kimberly, ID 83341, USA
Preventing irrigation furrow erosion with small applications of polymers
Soil erosion is a serious problem threatening sustainability of agriculture globally and contaminating surface waters. The objective of this study was to determine whether low concentrations of anionic polymers in irrigation water would appreciably reduce irrigation furrow erosion on Portneuf silt loam (coarse-silty, mixed, mesic Durixerollic Calciorthid), a highly erodible soil. The PAM provided better erosion control than the starch copolymer. Efficacy of PAM treatments varied depending on its concentration, duration of furrow exposure, and water flow rate. In the initial (treated) irrigation and at low flow rates, 10 g m-3 PAM reduced mean sediment load by 87% compared with untreated furrows. Residual erosion abatement in a subsequent irrigation, without further addition of PAM, was approximately 50%. The PAM increased net infiltration and promoted greater lateral infiltration. Effective erosion control was achievable for a material cost below $3 ha-1 irrigation-1. -from Authors
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