Effects of the Application of Charred Bark of Acacia Mangium on the Yield of Maize, Cowpea and Peanut, and Soil Chemical Properties in South Sumatra, Indonesia,
Yamato, M., Okimori Y., Wibowo I. F., Anshori S., and Ogawa M.
, Soil Science and Plant Nutrition , Volume 52(4), p.489-495, (2006)