This experimental study was carried out to examine the utilization of the anthracite ash as a fertizer. It was found that the ash had very small amount of the soluble matters in 2% citric acid solution therefore it is proved ineffective as a fertilizer. When the small amount of calcinated dolomite was added to the anthracite, it was observed that the resulting ash showed much increased solubility of magnesium, calcium, sulfur and silica etc in the citric acid solution. So it is concluded that the ash of the mixture of anthracite and calcinated dolomite would be one of the useful soil-conditioner and supplyer of nutrients.
無煙炭 炭分을 肥料로서 利用하기 爲하여 硏究를 하였다. 無煙炭 炭粉은 2% 시트르산 溶液中에서는 可溶物質이 大端히 적으나 ?燒된 dolomite를 添加한 無煙炭炭粉은 마그네슘, 칼슘, 황, 無水珪酸 等의 拘溶性 可溶分이 많아 지므로 肥料로서의 效果가 있음을 알았다.