抄録
Experiments were made with the soils, alluvial, volcanic ashy and mineral acidic. Conditioner, applied in 0.1% of the soil, caused the soil to aggregate 4〜5% of its amount (see Table 1). Soli aggregate (0.25 mm<), by conditioner, had somewhat higher absorptive power for phosphoric acid (see Table 2). Conditioner became more effective with an increase of applied amount (see Table 3). By the addition of Krilium (0.15% of soil) soil was somewhat protected from its being washed down (see Table 1).
