Issue No. 37 - Winter 2003

Making changes in farming practises requires commitment, time and resources. Producers are interested in knowing the long-term benefits of these changes and especially their economic impact. 

We had the opportunity in 2002 to get some indication of the magnitude of the long-term agronomic and economic benefits of direct seeding. We measured the response of spring wheat to nitrogen fertilizer on two fields with very different direct seeding histories i.e. 20+ years vs 1 year. The test areas were close enough together to eliminate differences in precipitation as a controlling variable. We used one rate of phosphorus fertilizer (20 lbs P2O5/ac). Table 1 provides some general information about the two sites and also some pertinent agronomic information. Both areas were seeded to canola in 2001.

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