Influences of Polyalkyl-allylsulfonate (Clemol) on the Phosphorous Fixation in the Soil

Repressing effect of polyalkyl-allysulfonate (clemol) on the phosphorous fixation in the soil was investigated in comparison with the similar effect of humate. 2. In this experiment, sodium salt, ammonium salt and calcium salt of clemol as well as Na-humate and NH_4-humate were used. Higashiiwanaga red soil, Aso volcaic-ash soil, Ichijoji yellow soil and Nogihama sandy soil were put to use as material soils to be treated. 3. Phosphorous fixation activity of the treated soils to which were added 1% clemol and humate in aqueous solution were measured at five stages of pH. 4. Each Sample repressed the phosphorous fization of soil. However the most effective sample was not always fixed, and varied according to the hind of soil and pH. 5. On the whole Na-humate and Na-clemol were generally effective, but ammonium humate and NH_4-clemol were effective in a certain soil. It may be hardly expected that Ca-clemol represses the phosphorous fixation in the soil. ....