Aprillia, PristianaZul, DelitaFibriarti, Bernadeta Leni2014-03-282014-03-282014-03-28Rangga Dwijunanda Putrahttp://repository.unri.ac.id/xmlui/handle/123456789/5979Phosphate solubilizing bacteria (PSB) is beneficial bacteria which are not only capable in solubilizing organic phosphate into inorganic phosphate, but also producing cyanide acid (HCN). HCN plays a role in controling weed growth. The objective of this research was to screen the potency of indigenous PSB isolated from peat soil in producting HCN. The collections of PSB were subcultured in King’B broth. The ability of 152 isolates on HCN production were tested qualitatively using filter paper soaked with picric acid and Na2CO3 . The result indicated that as many as 26 isolates (17.1%) were able to release various levels of HCN production based on the appearing of brown, dark brown, or reddish brown colour on the filter paperotherCyanide acidPhosphate Solubilizing Bacteria (PSB)weedOther