Tarigan, Niko KristianArmainiElza Zuhry2013-06-212013-06-212013-06-21arnalishttp://repository.unri.ac.id:80/handle/123456789/3741Niko Kristian Taringan. Jur.2013The purpose of this study was to look for supplementary doses of liquid fertilizer and chicken manure and the best combination for growing mustard plants. The study was conducted at the experimental farm of the Faculty of Agriculture, University of Riau. This study was conducted from January to March 2012. The research was done experimentally by using Completely Randomized Design (CRD) factorial consisting of two factors, the first factor consisted of two levels: P = liquid fertilizer supplement (3cc / l, 6cc / l of water). The second factor consists of 3 levels: K = Giving chicken manure (0.5 kg / plot, 10 kg / plot, 1.5 kg / plot) and 3 replication. The data were analyzed by Analysis of Variance (ANOVA). The data obtained were further tested by Duncans New Multiple Range Test (DNMRT) at the level of 5%. Indicators of parameter viewed from Plant Height, Number of leaves, leaf area, root length, and weight Fresh Harvest Crops. The results showed that the concentration of combined with a dose of liquid fertilizer complement and chicken manure applied in the mustard plant can increase the production of mustard plants. The plant height, number of leaves, fresh weight of the plant and harvesting the best there is in the complementary treatment of liquid manure concentration of 6 cc / l of water with chicken manure fertilizer 1.5 kg / plot (P2K3).otherliquid fertilizerchicken manuremustard plantstudent Paper Post Degree