Soil compaction and corn roots.

McLaughlin, N.B., Lapen, D.R., Kroetsch, D.J., Wang, X., Gregorich, E.G., Ma, B.-L., and Li, Y.X. (2004). "Soil compaction and corn roots.", in Bittman, S. and Kowalenko, C.G. (eds.) - Advanced Silage Corn Management: A production guide for coastal British Columbia and the Pacific Northwest, Pacific Field Corn Association, Agassiz, BC, Canada, Chapter 5, pp. 82-84.