aggregate stability as affected by polyacrylamide at monaco

aggregate stability as affected by polyacrylamide at monaco
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  • Does adding anionic polyacrylamide improve soil aggregation?
  • Adding anionic polyacrylamide (PAM) to soils stabilizes existing aggregates and improves bonding between and aggregation of soil particles. However, the dependence of PAM efficacy as an aggregate stabilizing agent with soils having different clay mineralogy has not been studied.
  • Can polyacrylamide be used as a soil conditioner?
  • The favorable effects of the environmentally friendly, nontoxic, anionic polyacrylamide (PAM) as a soil conditioner have long been established. Some uncertainties exist, however, regarding the effects of PAM molecular weight (MW) on its performance as a soil amendment and its ability to penetrate into aggregates and stabilize interior surfaces.
  • Does Pam improve structure and aggregate stability?
  • The effectiveness of PAM in improving structure and aggregate stability was directly related to clay activity and to soil conditions affecting PAM adsorption (e.g., electrolyte resources, pH, and exchangeable cations) to the soil particles and inversely to the inherent aggregate stability.
  • Do anionic polymers affect smectitic soil stability?
  • We studied the effects of two anionic polymers, a high-MW (12 × 10 6 Da) and a medium-MW (2 × 10 5 Da) PAM, using deionized water (electrical conductivity of 0.004 dS m −1) or a 15 mmol L −1 gypsum solution, on the stability of aggregates from four smectitic soils varying in clay content.