6Dogliotti S, Giller K E, Van Ittersum M K. Achieving global food security whilst reconciling demands on the environment: report of the first international conference on global food security[J]. Food Security, 2014, 6: 299-302.
7Doran J W, Coleman D C, Stewart B A et al . Defining soil quality for a sustainable environment[M]. Madison WI: SSSA Special Publication, 1994. 3-21.
8Bone J, Barraclough D, Eggleto P et al . Prioritising soil quality assessment through the screening of site: the use of publicly collected data[J]. Land Degradation and Development, 2014, 25: 251-266.
9Tisdale S L,Nelson W L. Soil Fertility and Fertilizers (4th ed.)[M]. New York: Macmillan Publish Company, 1985.