Purwantono, A. S. D., Indradewa, D., Sudira, P. and Kertonegoro, B. D. (2013) “Effect of Poultry Manure and Vertisols Matter on Availability and Leaching of Macronutrients in Coastal Sandy Soil”, JOURNAL OF TROPICAL SOILS, 16(1), pp. 17–24. doi: 10.5400/jts.2011.v16i1.17-24.