Response of irrigated soft white spring wheat to seeding date, seeding rate and fertilization
Bibliographic record
Abstract
Irrigated production of soft white spring wheat (Triticum aestivum L. Em Thell.) (SWSW) for pastry flour or ethanol production is feasible if the high yield potential of recently released cultivars can be realized. Field studies were conducted at three locations over a 3-yr period to determine the response of irrigated SWSW to seeding date, seeding rate and fertilization (N, P and K) in southern Alberta. The highest yield was obtained for the first seeding date (Apr. 20 to 24). Seeding 2 wk later reduced ave rage grain yield by 3%, while seeding 4 wk later reduced average grain yield by 15%. The optimum seeding rate was 200 to 240 viable seeds m -2 (84 to 101 kg ha -1 ). Maximum yields were achieved when total available N (fertilizer + residual soil NO 3 -N + mineralized N) was greater than 26 kg N Mg -1 of potential yield. Mineralized N ranged from 45 to 183 kg N ha -1 (mean 125 kg N ha -1 ). Grain protein concentration did not exceed the maximum allowed for protein premiums (99 g kg -1 ) when total available N was less than 27 kg N Mg -1 of potential yield. The optimum P fertilizer rate was approximately 13 kg P ha -1 unless extractable soil P was very high. No response to K fertilizer was observed. Maximum grain yields of 7.3 to 10.6 Mg ha -1 were achieved by seeding early with a minimum of 200 viable seeds m -2 and application of sufficient N and P fertilizer. Key words: Triticum aestivum, nitrogen fertilizer, N mineralization, grain protein concentration, phosphorus
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".