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在佐治亚州十五个农业试验区以径流池高强度模拟降雨的研究表明,超过限定时间的渗透和总土壤流失量与土壤结构无关,而与每个土壤有关。渗透和流失都与土壤分散性的几种措施有关。根据时间,摇动36小时后,在水:土壤为8:1和分散粘粒指际测定的粘粒分散情况下,所测定的分散粘粒与土壤流失(r=0.88～0.89)和渗透(r=-0.5～-0.6)有显著相关。从试验小区(未分散粘粒)取得的分散为纵坐标,时间为横坐标,存在着较低的相关系数,正如包括粉砂和粘粒分散变量一样。在这些土壤中,高分散粘粒百分数的出现,决定了水传导孔隙并减少渗透,因此,在侵蚀预报和控制中,分散可能是必须考虑的十分重要的土壤特性。
High-intensity simulated rainfall in runoff ponds in 15 agricultural experimentation areas in Georgia showed that infiltration and total soil loss over a defined period of time were not related to soil structure but to each soil. Penetration and loss are all related to several measures of soil dispersibility. According to the time, after shaking for 36 hours, the scattered clay and soil loss (r = 0.88 ~ 0.89) and infiltration (r = -0.5 ~ -0.6) were significantly correlated. The dispersion obtained from the experimental plot (undispersed clay) is plotted as ordinate and time as abscissa, with a low correlation coefficient, as does the inclusion of silt and clay-dispersed variables. In these soils, the presence of highly dispersed clay particles determines the water-conducting porosity and reduces the infiltration, so dispersion may be a very important soil property that must be considered in erosion prediction and control.