5Rhodes Yepsen. Nuts & Bolts:Windrow turners [J]. Bio Cycle September,2008,49.
6Diaz L,Savage G,Goldstein N. Windrow turner equipment review[J].Bio Cycle March,2005,46.
7Hue N V, Liu J. Predicting compost stability [ J ] . Compost Science and Utilization, 1995,3 ( 2 ) : 8 - 18.
8Veerapan C,Hiroshi K. Carbon/organic nitrogen ratio in water extract as measure of composting degradation [ J ]. Ferment Technol, 1981,59 (3) :215-219.
9Morel J L,Colin F,Germon J C,et al. Methods for the evahuation of the maturity of municipal refuse[ M]//Gasser J K. composting of Agricuhural and other Wastes. London: Elsevier Appled Science publishers, 1985:56 - 72.
10Garcia C, Harnandez T, Costa F. Study on water extract of sewage sludge composts [ J ]. Soil Sci Plant Nutr, 1991 ( 37 ) :399 - 408.