Add university-extension variety trials: Illinois VT + Iowa ICPT + Ohio OCPT (+123 trial docs)
Independent third-party performance data — land-grant programs that test every entered brand side-by-side with replication + LSD stats. This is the legitimate way to get Pioneer / DEKALB / Brevant / Channel performance the corpus can't scrape directly (data_type=trial, results[] shape; falls through the trial chunker). - illinois_vt_trials (30 docs, 1,392 rows) — U of Illinois VT. Per-region XLSX (openpyxl), corn + soy + WHEAT, 2024+2025. Rich per-site agronomic metadata; corn-following-corn vs -soybean kept distinct. - iowa_icpt_trials (24 docs, 674 rows) — Iowa State ICPT. ASP.NET GridView (viewstate postback for year/district), corn + soy by district x season. - ohio_ocpt_trials (69 docs, 4,647 rows) — OSU/CFAES OCPT. Report PDF (pdfplumber; per-site column groups split by header Yield-token count + x-coord footnote bucketing), corn + soy per site, 2024+2025. 91 distinct seed brands across the three; majors confirmed present in the independent rankings: DEKALB 395, Golden Harvest 249, Channel 241, NK 212, Xitavo 135, LG 103, Pioneer 88, Asgrow 59. (A brand only appears where it ENTERED a given program — e.g. Brevant not in Iowa, DEKALB/Channel not in Illinois — true negatives, not parse gaps.) - rag/chunk.py: gated `include_region` on _render_gh_plot_chunk; the 3 university sources route through it so the region/district is in the embedded chunk + labeled "variety trial (cross-vendor, independent third-party)". Existing plot sources (gh/lg/agrigold/proharvest) unchanged. - requirements.txt: openpyxl (Illinois XLSX; scrape-time only). - sources.json + README/CLAUDE/lessons: registered + attributed; lessons trial-data + Pioneer entries updated (Pioneer/DEKALB performance now available indirectly via these trials). Validation: all 123 chunk via rag.chunk.chunks_from_trial (0 errors), 0 out-of-range yields, 0 dup keys. Public land-grant data; attribution recorded in each tos_note. CI rebuilds the index from the committed corpus.
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# Soybean yield trial — University of Illinois VT, Region 4, IL 2024
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- **Publisher:** University of Illinois Variety Testing (independent cross-vendor trial)
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- **Crop:** Soybean
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- **State:** IL
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- **Year:** 2024
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- **Region:** Region 4
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- **Rotation:** corn following soybean
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- **Cooperator / host:** Dennnis Brown
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- **County:** Fayette
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- **Sites:** St Peter, Belleville
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- **Soil type:** Bluford-Damstadt silt loam
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- **Tillage:** Field Cultivator, Vertical till
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- **Planted:** 2024-05-21
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- **Harvested:** 2024-10-23
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- **Source XLSX:** https://vt.cropsci.illinois.edu/wp-content/uploads/2024/11/2024-Region-4.xlsx
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- **Index page:** https://vt.cropsci.illinois.edu/soybeans/
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---
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## Results (ranked by regional yield)
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| Rank | Brand | Product | Traits | Yield | Lodging | Height | Protein | Oil |
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|---|---|---|---|---|---|---|---|---|
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| 1 | AgVenture | AV 45B2E | HT:EN ST:Be | 73.71 | 4.867 | 37.168 | 33.2013 | 20.7479 |
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| 2 | AgVenture | AV 41Y5E | HT:EN ST:Bs | 72.718 | 3.191 | 33.201 | 33.9174 | 20.8434 |
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| 3 | AgVenture | AV 44B2E | HT:EN ST:Be | 72.516 | 4.099 | 36.747 | 32.9277 | 21.1774 |
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| 4 | NuTech | 39N08E | HT:EN ST:B | 72.235 | 2.853 | 34.733 | 34.3206 | 21.0405 |
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| 5 | AgVenture | AV 39B2E | HT:EN ST:Be | 72.079 | 2.833 | 34.275 | 34.2098 | 21.0019 |
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| 6 | Burrus | 4134E | HT:EN ST:Bs | 72.023 | 2.968 | 30.879 | 33.8065 | 21.2062 |
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| 7 | AgVenture | AV 43B2BE | HT:EN ST:Be | 71.939 | 2.993 | 32.924 | 34.9087 | 20.4439 |
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| 8 | Baird Seed | Illini 4300N | HT:CV ST:B | 70.835 | 1.668 | 29.124 | 33.3516 | 21.8014 |
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| 9 | AgVenture | AV 48B2E | HT:EN ST:Be | 70.707 | 4.838 | 36.138 | 33.4624 | 20.6619 |
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| 10 | Baird Seed | Illini 4221N | HT:CV ST:B | 69.249 | 3.686 | 31.38 | 33.5127 | 21.3613 |
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| 11 | Dyna-Gro | S37XF15 | HT:RX ST:Bs | 69.081 | 2.749 | 30.951 | 32.7448 | 20.9353 |
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| 12 | Dyna-Gro | S38EN75 | HT:EN ST:Bs | 68.369 | 0.834 | 27.788 | 34.3 | 20.9333 |
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| 13 | Hoffman | H43E25 | HT:EN ST:B | 68.268 | 5.704 | 38.673 | 34.2226 | 20.8766 |
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| 14 | AgVenture | AV 36B2E | HT:EN ST:Be | 67.831 | 2.167 | 31.69 | 34.5834 | 20.4167 |
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| 15 | Benson Hill | BH39A232 | HT:CV ST:Bs | 66.782 | 3.29 | 32.004 | 34.0395 | 20.5629 |
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| 16 | Benson Hill | BH39A150 | HT:CV ST:Bs | 66.707 | 2.989 | 35.763 | 34.66 | 20.2792 |
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| 17 | Hoffman | H38E25 | HT:EN ST:B | 66.559 | 1.412 | 30.549 | 33.2207 | 21.2407 |
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| 18 | AgVenture | AV 47Y6E | HT:EN ST:Bs | 66.055 | 3.157 | 37.011 | 33.6655 | 20.7406 |
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| 19 | Hoffman | H393N | HT:CV ST:B | 65.782 | 1.8 | 33.962 | 33.972 | 20.7812 |
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| 20 | DONMARIO | DM36F84S | HT:RF ST:B | 65.737 | 2.126 | 33.528 | 33.636 | 21.149 |
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| 21 | AgVenture | AV 42A1E | HT:EN ST:Bs | 65.253 | 2.752 | 34.26 | 34.6855 | 20.4842 |
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| 22 | NuTech | 36N06E | HT:EN ST:B | 65.217 | 2 | 30.594 | 33.3 | 21.0833 |
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| 23 | DONMARIO | DM38E54 | HT:EN ST:B | 65.177 | 1.833 | 33.385 | 33.9167 | 21.1167 |
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| 24 | Hoffman | H42E25 | HT:EN ST:B | 63.588 | 3.501 | 33.858 | 33.1056 | 21.3696 |
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| 25 | AgVenture | AV 38A1E | HT:EN ST:Bs | 63.183 | 0 | 30.598 | 34.5167 | 21.35 |
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| 26 | Dyna-gro | S41XF65 | HT:XF ST:Bs | 61.836 | 3.608 | 34.569 | 33.9273 | 20.4493 |
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| 27 | DONMARIO | DM36E94 | HT:EN ST:B | 61.642 | 1.834 | 30.314 | 34.0834 | 21.45 |
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| 28 | Benson Hill | BX38F550 | HT:CV ST:Bs | 61.622 | 3.296 | 36.342 | 37.885 | 18.3353 |
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| 29 | Benson Hill | BH37U222 | HT:CV ST:Bs | 59.747 | 2.5 | 34.228 | 40.4167 | 17.45 |
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| 30 | Baird Seed | Illini 3849N | HT:CV ST:B | 59.703 | 2.667 | 29.56 | 31.9333 | 22.35 |
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| 31 | Benson Hill | BX36Q861 | HT:CV ST:Bs | 59.05 | 1.334 | 31.453 | 40.9167 | 16.8833 |
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| 32 | Baird Seed | Illini 3855N | HT:CV ST:B | 58.22 | 1.834 | 29.077 | 33.5667 | 20.9833 |
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| 33 | Benson Hill | BH37U221 | HT:CV ST:Bs | 58.215 | 2.167 | 33.307 | 38.45 | 18.4 |
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| 34 | Benson Hill | BH37Q218 | HT:CV ST:Bs | 56.758 | 2.334 | 32.469 | 37.9667 | 18.7 |
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| 35 | Benson Hill | BH37U206 | HT:CV ST:Bs | 56.498 | 1.667 | 29.386 | 38.95 | 17.95 |
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| 36 | Benson Hill | BX37Q467 | HT:CV ST:Bs | 53.756 | 1.833 | 33.308 | 38.9167 | 18.3 |
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| 37 | Benson Hill | BH37U205 | HT:CV ST:Bs | 50.815 | 2.293 | 32.432 | 41.4027 | 16.774 |
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| 38 | Baird Seed | Illini 3546N | HT:CV ST:B | 47.243 | 2.167 | 30.166 | 34.6 | 20.4833 |
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