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Bronick, C., & Lal, R. (2005). Soil Structure and Management : a review. Geoderma, 124, 3-22.

Cahill, J. F. (2003). Lack of Relationship Between Belowground Competition and Allocation to Roots in 10 Grassland Species. Journal of Ecology , 91, 532-540.

Canada Department of Agriculture, Research Branch,Glossary of Terms in Soil Science, revised 1976.

Casper, B. B., & Jackson, R. B. (1997). Plant Competition Underground. Annual Review of Ecology Systematic, 28, 545-570.

McKinney, M. L. (2002). Urbanization, Biodiversity, and Conservation. BioScience, 52, 883-890.

Passioura, J. B. (1991). Soil Structure and Plant Growth. Australian Journal of Soil Research, 29, 717-728.

" This is a class exercise based on modified or randomly generated datasets. "