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Effect of fertilizer nitrogen management and phosphorus placement on canola production under varied conditions in Saskatchewan

Lemke, R.L., Mooleki, S.P., Malhi, S.S., Lafond, G., Brandt, S., Schoenau, J.J., Wang, H., Thavarajah, D., Hultgreen, G., May, W.E. (2009). Effect of fertilizer nitrogen management and phosphorus placement on canola production under varied conditions in Saskatchewan, 89(1), 29-48. http://dx.doi.org/10.4141/CJPS08025

Abstract

No-till (NT) requires all fertilizer nutrients to be applied during planting, but high rates of fertilizer nitrogen (N) in close proximity to the seed can negatively affect seedling development; therefore, different placement technologies have been developed to place seed and N in a single operation while maintaining an adequate separation between them. We conducted a 3-yr field study (2000 to 2002) at four sites in Saskatchewan. The objective was to determine the effects of N fertilizer form [urea (U) and anhydrous ammonia (AA)], placement [broadcast, side-band (SB) and mid-row band (MRB)], timing (fall vs. spring), rate (0 to 90 or 120 kg N ha-1), and P fertilizer placement on yield, seed protein content and N uptake in canola. The N fertilizer managements had no significant effect on crop emergence. Yield, seed protein concentration and N uptake increased with increasing N fertilizer rate. Seed protein was significantly higher on SB compared with MRB and on U compared with AA. Seed yield and seed and straw N uptake were higher when U was SB compared with broadcast. Plant density was higher when P was placed in SB rather than with the seed, but the reverse was true for seed yield and seed N uptake.

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