ABSTRACT The research of the effect of dose of farm manure and concentration of dekamon on the yield of horse radish (Rhaphanus sativus L. Hortensjs Backer variety), hgd been carried out since September, 1st until Nopember, 9th , 1992 at Pucanganom village, Srumbung sub distric, Magelang district, Central-Java province, on the altitude 501 m sea level, temperatur 26 c, and regosol vulcan so…