1. Aarrestad, P.A., Masunga, G.S., Hytteborn, H., Pitlagano, M.L., Marokane, W., and Skarpe, C., Influence of soil, tree cover and large herbivores on field layer vegetation along a savanna landscape gradient in northern Botswana, J. Arid Environ., 2011, vol. 75, pp. 290–297.
2. Academic Divisions of Chinese Academy of Sciences, Some propositions on advancing the comprehensive control of karst mountain areas in southeast China, Adv. Earth Sci., 2003, vol. 18, pp. 489–492.
3. Bao, S.D., Soil Assay on Properties of Agro-Chemistry, Beijing: China Agric., 2000, 3rd ed.
4. Baskin, Y., Ecosystem function of biodiversity, Biol. Sci., 1995, vol. 44, pp. 657–660.
5. Brookes, P.C., Powlson, D.S., and Jenkinson, D.S., Measurement of microbial biomass phosphorus in soil, Soil Biol. Biochem., 1982, vol. 14, pp. 319–329.