Polymers as Soil Conditioners Under Consecutive Irrigations and Rainfall

摘要: Low water infiltration caused by crust formation during rain or sprinkler irrigation is a significant problem in some arid and semiarid regions. Polymers may be applied through system, but must directly to the soil under rainfall conditions. The objectives of this simulator study were to: (i) determine effect drying crusted vermiculitic on subsequent properties rate (IR) values, (ii) polymers at low concentration two qualities IR consecutive applications, (iii) effectiveness polymer application as would required Two cationic polysaccharide guar derivatives having higher (HCCP) lower (LCCP) charge density polyacrylamide (PAM) with negative used study. Applications maintain order HCCP > LCCP PAM untreated. Except for PAM, applications relatively ineffective plain impact energy. beneficial effects preserved without Spraying concentrated solutions surface was not effective preventing following events except case when sprayed CaCl₂ solution. results are explained basis adsorption penetration into layer aggregates.