1. Alberta Agriculture Field Branch. (1985). Canola production in Alberta. Agdex# 149/20-1.
2. Alva A.K., Collins H.P., Boydston R.A. (2002) Corn, wheat, and potato crop residue decomposition and nitrogen mineralization in sandy soils under an irrigated potato rotation. Communications in Soil Science and Plant Analysis. 33: 2643–2651
3. Anderson D.W. (1988) The effect of parent material and soil development on nutrient cycling in temperate ecosystems. Biogeochemistry. 5: 71–97
4. Arnold, J. G., Weltz, M. A., Alberts, E. E., & Flanagan, D. C. (1995). Chapter 8: Plant growth component. In D. C. Flanagan & M. A. Nearing (Eds.), USDA—water erosion prediction project Hillslope profile and watershed model documentation. NSERL Report No. 10.
5. Bauder, T., Waskom, R., Schneekloth, J., & Alldredge, J. (2003). Best management practices for Colorado corn. Retrieved from Colorado State University Cooperative Extension website (Bulletin XCM574A): http://www.coloradocorn.com/resources/bmp/59P.pdf .