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Fluid Journal : Fluid Journal 2005-2007
12 Fluid Journal SPRING 2007 !∀#∃%&∀∋( )∀∗ +∀∃∗ -∗./∋&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 also influenced specific gravity in two site-years. In 2005, a higher specific gravity was obtained where N was applied as a 2x split at preplant and at hilling, than where it was applied either all preplant or at four times during the growing season. In contrast, a higher specific gravity was obtained in 2004 where N was either applied all preplant, as a 2x split application at preplant or at hilling, than where N was applied at four times throughout the growing season. Preliminary results suggest that N fertilizer treatments had little measurable effect on fry color. However, in 2005 and 2006, N application reduced or tended to reduce the percentage of tubers with sugar ends and/or dark ends. Preliminary analysis indicates that, in most cases, the occurrence of hollow heart and brown center was greater in the control treatment than in N fertilized treatments, and that increasing N rate sometimes reduced the occurrence of hollow heart and brown center. However, N treatment did not consistently reduce actual losses in marketable yield due to hollow heart. Dr. Mohr is sustainable systems agronomist at Agriculture and Agri- Food Canada, Brandon Research Centre, Manitoba, and Dr. Tomasiewicz is manager at the Canada-Manitoba Crop Diversification Centre at Carberry, Manitoba. Now on the Internet and Cataloged Click on and pass on valuable information to your customers! www.fluidfertilizer.com All articles published in the Fluid Journal.
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