Studies of the effect of sewage sludge field application on the porosity and organic matter content of field soil
1992
Hasegawa, K. (Ishikawa Prefecture Coll. of Agriculture, Nonoichi (Japan))
1) Physical and chemical properties of sand soil and sandyloam soil in coast forest which were applied with sewage sludge were investigated eight months and twenty months after surface application or mixing application. The results are as follows. 2) Soil physical properties-especially porosity were improved better than by surface application. 3) Lime-treated sewage sludge application at 90 kg/4-centiare (255 t/ha) was permissible and was effective in increasing soil fertility and organic matter content in soil. It was considered that maximum application amount was determined by pH value of soil to which sewage sludge has been applied
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