Technical benefit of incorporation of Palm Oil Clinker (POC) Be, V, Cr, Ni, Cu, Zn, As, Se, Ag, Cd, Ba and Pb with levels of 5.13, 11.02, 2.65, 1.93, 45.43, 11.84, 15.07, 0, 0, 81.97 and 1.76 mg/kg, respectively, in Be, V, Cr, Ni, Cu, Zn, As, Se, Ag, Cd, Ba dan Pb dengan tahap 5.13, 11.02, 2.65, 1.93, 45.43, 11.84, 15.07, 0, 0, 81.97 dan 1.76 mg /kg, Cu (1.05), Be (0.89), Zn (0.51), Ba (0.26), Ni (0.17), V (0.15), Cr (0.001)