Response of Shallot (Allium ascalonicum L.) Varieties to Plant Waste Organic Fertilizer Doses on Suboptimal Land in Banyuasin Regency, South Sumatra, Indonesia

The cultivation of several varieties of shallots (Allium ascalonicum L.) on suboptimal tidal type D land in Banyuasin Regency has not been explored. The low pH and nutrients on the land are the main obstacles. However, it can be overcome by using organic fertilizer from local organic fertilizer resources, especially plant waste (rice straw, banana tubers, water hyacinth and coconut husks), which are widely available in Banyuasin Regency. This research aims to obtain the correct dose of organic plant fertilizer from local resources for certain shallot varieties on suboptimal land. The study used a factorial randomized block design with two treatment factors and 3 replications. The shallots studied were the Bima Brebes (V1), Tajuk (V2) and Sanren (V3) varieties. Meanwhile, the dose of organic fertilizer for plant waste is 0 kg (D0), 7.5 tons/hectare (D1), 15 tons/hectare (D2), and 22.5 tons/hectare (D3). The variables observed were plant height (cm), number of leaves (strands), number of tillers (fruit), and number of tubers per hill (tubers). The research results showed that a dose of organic fertilizer of 7.5 tons/hectare produced the highest plant height, namely 36.64 cm, and the highest number of leaves is 17.48 strands. Meanwhile, the dose of organic fertilizer from plant waste was 22.5 tons/hectare, producing the highest number of tillers, namely 7.35, and the highest number of tubers per hill, namely 9.08. The Bima Brebes variety is the variety with the highest yields for all parameters compared to the Tajuk variety and the Sanren variety.