Nonstructural Carbohydrate Concentration during Field Wilting of PM‐ and AM‐Cut Alfalfa
Bibliographic record
Abstract
Alfalfa ( Medicago sativa L.) cut in the late afternoon has a greater nonstructural carbohydrate (NSC) concentration than AM‐cut alfalfa but this difference might not be maintained during wilting. We monitored NSC concentration of PM‐ and AM‐cut alfalfa during wilting in narrow and wide swaths. Field‐grown alfalfa was cut either at 1800 h (PM) on days without rain (Day 0) or at 0800 h (AM) the following morning (Day 1) in seven growth cycles over 3 yr. Samples taken during wilting were analyzed for NSC (soluble carbohydrates + starch). At cutting, PM‐cut alfalfa had consistently greater NSC concentration [+6 to 54 g kg − 1 of dry matter (DM)] than AM‐cut alfalfa. The NSC concentration decreased during wilting at rates that depended on growth cycles (0.2–3.5 g kg − 1 DM h − 1 on Day 1) but this decline was similar for AM‐ and PM‐cut alfalfa. When cut alfalfa reached 350 g DM kg − 1 fresh matter (FM) on Day 1, NSC concentration was greater for PM‐ than for AM‐cut alfalfa (average of 15 with a range of 4–37 g kg − 1 DM) and greater for the wide than narrow swaths (average of 7 with a range of 1–11 g kg − 1 DM). Photosynthesis continued for 3 h on the morning of AM cutting for both PM‐ and AM‐cut alfalfa until DM concentration reached approximately 350 g DM kg − 1 FM. The combination of late PM‐cutting and wilting in wide swaths can be used to increase the NSC concentration of wilted alfalfa.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| 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".