OICC Press International Journal of Recycling of Organic Waste in Agriculture 2251-7715 15 3 2026 09 30 Rabbit Manure and Burnt Rice Husk Boosts Shallot Growth, Yield, and Soil Chemical Properties Over NPK Fertilizers 10.57647/ijrowa.2026.1503.30 EN Wan Asfa Farwizah Wan Muhamad Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia,UPM, Serdang, Selangor, Malaysia Nur Shahirah Mohd Sarwan Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia,UPM, Serdang, Selangor, Malaysia Muhammad Aqil Azham Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia,UPM, Serdang, Selangor, Malaysia Elisa Azura Azman Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia,UPM, Serdang, Selangor, Malaysia Munirah Mohamad Horticulture Research Centre, Malaysian Agricultural Research and Development Institute, Serdang Selangor, Malaysia Muhammad Rahman Djuwansah Research Center for Environmental and Clean Technology, National Research and Innovation Agency, Bandung, Indonesia Ania Citraresmini Faculty of Agriculture, Padjadjaran University, Jatinangor, Sumedang, Indonesia Sarah Baharudin Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia,UPM, Serdang, Selangor, Malaysia Nor Elliza Tajidin Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia,UPM, Serdang, Selangor, Malaysia Journal Article 2026 09 30 Purpose: Dependency on chemical fertilizers in shallot production has increased farmers’ production expenses and resulted in several environmental issues. Using organic fertilizers and soil amendments can help reduce reliance on chemical fertilizers. Method: The three shallot cultivars utilized in this study were Bawang BAW1 (MARDI) (BM), Bawang India (BI), and Bawang Siam (BS). The experiment was arranged in three different randomized complete block designs according to the other cultivars with four replications and treated with five fertilizer treatments which were (a) control, (b) NPK fertilizer (NPK) of 15:15:15 at 450 kg/ha (CF), (c) Rabbit manure (RM) + burnt rice husk (BRH) (organic fertilizer (OF)), (d) 225 kg/ha NPK + OF (OCF1), and (e) 112.5 kg/ha NPK + OF (OCF2). Growth performance, yield and soil properties after harvest were recorded. Results: OF treatment resulted in the best outcomes in terms of total weight, bulb diameter, bulb weight, marketable yield, and macronutrient content across the three shallot cultivars, compared to the other treatments. The combination of OF with NPK fertilizer (OCF1 and OCF2) consistently ranked second in growth, yield and macronutrient content while also leading to notable improvements in various soil chemical properties, particularly the availability of essential nutrients and cation exchange capacity (CEC). Conclusion: The application of OF showed great promise as an organic alternative for shallot production, as it gave the highest yield and macronutrient content across the three cultivars.