The assessment was conducted in Debowae village, Waeapo sub district, Buru district in planting season 2011 which aimed to determine the effect of three kinds of organic fertilizers on growth and yield of rice on sub-optimal land. The treatments were the use of three kinds of organic fertilizers derived from farmyard manure, organic granules, and petroganic. Each treatment was replicated 3 times (farmers as replicates). Dosage of organic fertilizer used was 3 t farmyard manure, 1 t organic fertilizer granules and 1 t ha-1 of petroganic fertilizer. The variety used was swamp rice var. Indragiri, obtained from the Rice Research Institute Sukamandi. Rice was cultivated with the technology of integrated crop management. Inorganic fertilizer used was 300 kg NPK Phonska and 200 kg urea ha-I , where half of the urea and all of NPK Phonska were given to the plants at the same time at 7 days after planting (dap), and the rest of the urea was given at 24 and 38 dap. Parameters measured were physical and chemical properties of soil, crop growth and yield components. The study results showed that the type of soil at the study site is Endoaquepts and the soil fertility status is low. The kinds of organic fertilizer that gave the best growth average and rice yield are petroganic, followed by organic granules and the lowest was manure. The average productivity of rice obtained by combining the application of the organic and inorganic fertilizers with the use of adaptive varieties for sub-optimal land ranged from 6.58 to 6.75 t ha-1, although generally there were no significant differences.  Oleh: Sirappa Marthen Passang dan Wahid (Balai Pengkajian Teknologi Pertanian Maluku (Indonesia)). Jurnal Budidaya Pertanian. Tahun 2013, Vol. 8(2) p. 95-102