2Laird D A,Fleming P,Davis D D,et al. Impact of biochar amendments on the quality of a typical midwestern agricultural soil[J]. Geoderma, 2010,158(3/4) : 443-449.
3Aranon N Q, Edwards C A, Bierman P. Influences of ver- min composts on field strawberries: Part 2. Effects on soil microbiological and chemical properties[J]. Bioresource Technology, 2006,97: 831-840.