Gachengo, Catherine N.; Vanlauwe, Bernard; Palm, Cheryl Ann; Cadisch, George. 2004. Chemical characterisation of a standard set of organic materials. In: Delve, Robert J.; Probert, M.E. (eds.). Modelling nutrient management in tropical cropping systems. Australian Centre for International Agricultural Research (ACIAR); Centro Internacional de Agricultura Tropical (CIAT), Canberra, AU. p. 48-53. (ACIAR proceedings no. 114)

soil organic matter; soil testing; materia orgánica del suelo; análisis del suelo