SampurnoYunianti, RahmiSyukur, Muhamad2014-06-022014-06-022014-06-020853-7674wahyu sari yenihttp://repository.unri.ac.id/xmlui/handle/123456789/6365The objective of this experiment was to obtain manure substitution levels with decomposed sago waste which suitable to sweet corn production. The experiment was carried out at experimental field of Faculty of Agriculture, Riau University, from August 1998 to January 1999. The experiment was arranged in randomized block design with single factor and three replications. Thirteen levels of sago waste substituted were treated : 100% manure as the control (P0), substituted 25% with sago waste that decomposed 4 weeks (P t), substituted 25% with sago waste that decomposed 6 weeks (P2), substituted 25% with sago waste that decomposed 8 weeks (P3), substituted 50% with sago waste that decomposed 4 weeks (P4), substituted 50% with sago waste that decomposed 6 weeks (P5), substituted 50% with sago waste that decomposed 8 weeks (P6), sibstituted 75% with sago waste that decomposed 4 week (P7), substituted 75% with sago waste that decomposed 6 weeks (P8), substituted 70% with sago waste that decomposed 8 weeks (P9), substituted 100% with sago waste that decomposed 4 weeks (P10), substituted 100% with sago waste that decomposed 6 weeks (P11), substituted 100% with sago waste that decomposed 8 weeks (P12). The result showed untill 50% substituted with suitable duration of decomposition, production of sweet corn not significantly different with the control. Qualitatively, sago waste increased diameter of corn untill 75% substituted, and increased weight of 100 grains and length of corn until 100% substitutedenSago wastemanure substitutionUR-Scientific Work Lecturer