Seasonal trends in soil biochemical attributes: effects of crop management on a black chernozem

  • Published source details Campbell C.A., Lafond G.P., Biederbeck V.O., Wen G., Schoenau J. & Hahn D. (1999) Seasonal trends in soil biochemical attributes: effects of crop management on a black chernozem. Canadian Journal of Soil Science, 79, 85-97.


This study is summarised as evidence for the following.

Action Category

Use crop rotation

Action Link
Soil Fertility
  1. Use crop rotation

    A controlled, replicated experiment in 1995-1996 on clay soil in Saskatchewan, Canada (Campbell et al. 1999) found soil organic carbon was 30% higher in the fertilized continuous wheat Triticum aestivum after 39 years, compared to the beginning of the experiment. Soil organic carbon was also 41 % higher under the fallow-wheat-wheat-hay-hay-hay (brome Bromus inermis-alfalfa Medicago sativa) compared to fallow-wheat rotation after 39 years. However soil organic carbon did not differ between rotations over the two years sampled. A long term rotation study was established in 1957, and treatments included: continuous wheat Triticum aestivum unfertilized, continuous wheat fertilized, fallow-wheat unfertilized, fallow-wheat-wheat straw retained, fallow-wheat-wheat straw harvested, green manure (sweet clover Melilotus officinalis or black lentil Lens culinaris)-wheat-wheat unfertilized, and fallow-wheat-wheat-hay-hay-hay unfertilized. Fallow treatments were treated regularly with Roundup, Banvel and Rustler to prevent weeds. There were four replicates. Plot size was not specified. Soils were sampled in 1995-1996, depth not specified. Effects of rotation on microbial biomass were reported but not clear.


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