Onion cultivation in pots is a solution of limited land in urban areas. Nevertheless, the onion productivity is constrained by the quality of planting media. The utilization of rabbit manure is an alternative to improve the quality of planting media. This study was aimed to determine the effect of rabbit manure level in the planting media on the growth and yield of onion, as well as the effect of rabbit manure on planting media quality. The method used was a completely randomized design with one factor and 12 replications. The treatment was rabbit manure level on growth media i.e. 0%; 25%; 50%; 75%; and 100%. Parameters measured were leaf lenght, number of leafss, diameter and weight of bulbs, pH of planting media, Cation exchange capacity (CEC), Sodium, Phosphor and Potassium. The results showed that 25%-50% rabbit manure in planting media produced the best on leaf lenght, number of leafs, diameter of bulbs, and weight of bulbs. The application of rabbit manure on ultisol soil media was able to increase pH, nitrogen, phosphorus, and cation exchange capacity, vice versa decreased the content Potassium.

This study aims to test several organic fertilizer production technologies from household waste, and to have the authority to support the growth of vegetable plants cultivated in Kepulauan Seribu. Participatory assessment involving 10 selected cooperators. The assessment activity is carried out in two stages, namely: (1) testing of fertilizer production technology, and (2) testing of having fertilizers produced in crop system plants. Fertilizer production technologies studied include: (a) production technology using a mini composter, (b) production technology using a vermicompost system, and (c) production technology using a burial system. The variables observed included the speed of the production process based on the C/N ratio and fertilizer chemistry, including pH, macro and micro nutrient content. The plant treatment tests included: (a) selected solid fertilizer (compost) and (b) comparative compost (cow manure). The tested plants used included leaf vegetables (mustard greens, lettuce, kale and spinach), fruit vegetables (tomatoes and chilies), and root vegetables (shallots). The observation variables included the growth and yield variables. Observation data were analyzed using descriptive analysis. Based on the results of the study described above, it can be ignored that: (1) fertilizer production technology from organic waste using the vermicompost technology system produces organic fertilizer that is faster to produce, although not according to quality standards of organic fertilizers yet; (2) each of leaf vegetables (mustard greens, lettuce, spinach, and water spinach), and fruit vegetables (tomatoes and chilies), gave a good response to vermicompost, but had not to root vegetables (shallots)