5[1]Augustsson KA, Rundgren S. 1998. The advantages and disadvantages of Cognettia sphagnetorum in risk evaluation. Ambio, 27(1):61~68
6[2]Baer SG, Rice CW, Blair JM. 2000. Assessment of soil quality in fields with short and long term enrollment in the CRP. J Soil Water Conser,(2): 142~146
7[15]Jordan D, Kremer RJ, Bergfield WA,et al. 1995. Evaluation of microbial methods as potential indicators of soil quality in historical agricultural fields.Biol Ferti Soils, 19(4):297~302
8[16]Karlen DL, Mausbach MJ, Doran JW,et al. 1997. Soil quality: a concept, definition, and framework for evaluation (a guest editorial).J Soil Sci Soc Amer,61:4~10
9[17]Karlen DL, Gardner JC, Rosek MJ. 1998. A soil quality framework for evaluating the impact of CRP.J Produc Agric,11(1): 56~60
10[18]Kinako PDS. 1983. Assessment of relative soil quality by ecological bioassay.Afric J Ecol,21(4):291~295