Results from cooperative rod-row wheat trials in 1927

Waldron, L.R.

Results from cooperative rod-row wheat trials in 1927

1928

Waldron, L.R.

1. This paper reports 1927 results from 21 cooperative rod-row wheat trials variously located in North Dakota and also furnishes an estimate of 1927 common wheat rust losses in the state. 2. Judged by the size of the probable errors, by the rank in yield of certain wheats in comparison to what was expected of them from their previous behavior, and judged by the general consistency of the results among themselves, the outcome of these rod-row trials is considered satisfactory. 3. From 19 comparisons Garnet outyielded Marquis by a significant amount. 4. In regions I and II, in eastern North Dakota, the rust-resistant hybrid selection 1656.85 significantly outyielded all wheats except that in region I it was outyielded by Mindum (a durum) but not significantly. The excess of yield of 1656.85 over Marquis for 12 localities in the eastern section of the state was 16.0 +/- 0.64 bushels. 5. Six comparisons in eastern North Dakota between the essentially immune variety Hope and other wheats show that it yields significantly more than Marquis, not significantly different from Ceres, and significantly less than 1656.84 and 1656.85. Hope stands nearly midway between Marquis and 1656.85. 6. In western North Dakota, with less rust, 1656.85 showed less advantage over Marquis than it did farther east. 7. Judging by the behavior of 1656.85 from region to region and by Marquis and 1656.85 in the four regions, factors other than rust brought about losses equal to or surpassing losses due to rust. 8. An estimate based on available acreage and yield statistics indicated a loss to common wheat in North Dakota in 1927 of 28.6% which is equal to approximately 26 million bushels.

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