Sign up for email alerts of new Fluid Journal issues!
Fluid Journal : Fluid Journal 2005-2007
EARLY SPRING 2007 Fluid Journal 11 !∀#∃%&∀∋( )∀∗ +∀∃∗ -∗./∋&0 1∃(%∀23∗( 4∃% ∀∃∗ 5673∗&3∋03 /∋8 4∗∀8∃0%( %∀ 9∀∗: )∀∗ +∀∃; !∃(%/&∋/<#3 = -∗./∋&0 >/∗2&∋. ?3(3/∗0≅ = >3∗%&#&Α3∗( !ΒΧ15 ΔΕΦΓ ΦΔΗΙΦθΓΙΔΔΕΚ ΛΛΛΜ/.∗&3∋3∗.ΝΜ∋3% TECHNICAL INGREDIENTS applied at seeding versus all or part after crop emergence (Figure 3). However, yields were higher where some starter N was applied at seeding relative to no fertilizer, even if only 33 percent was applied as a starter N application. Scott site, 2005. There was no grain yield response to N and no significant treatment differences. However, there was a small effect on grain protein. Canola Indian Head site, 2004. There was a grain yield response to N. We also observed wheel traffic effects with all timings of post-emergent N applications, with the largest effect occurring at the last two application dates. Similar to spring wheat, applying some N at time of seeding was better overall than applying all the N post-emergent. Adding 33 to 67 percent or more of the fertilizer N requirements at seeding, combined with the two earliest dates of post- emergent application, was capable of protecting grain yields. Scott site, 2004. There was no overall N response, hence no conclusions can be made. Indian Head site, 2005. An overall N response was observed on yield (Figure 4), as well as an effect due to wheel tracks. At all stages of post-emergent N applications, providing that at least 33 percent of the target N was applied, there was no significant reduction in yield. However, if all N was applied after crop emergence, there was a significant drop in grain yield. Scott site, 2005. Providing that at least 50 percent of target N was applied at time of seeding, the post-emergent N application did not cause a reduction in yield. This is different from the results at Indian Head in 2005. The difference is a reflection of the overall drier growing season conditions at this site. Dr. Lafond, Mr. Brandt, Mr. May, and Mr. Holzapfel are research scientists with Agriculture and Agri-Food Canada, and Dr. Johnston is the northern Great Plains director with the Potash and Phosphate Institute of Canada.
Fluid Journal 2002-2004
Fluid Journal 2008-2009