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seed-mcp/corpus/iowa_icpt_trials/icpt-soybeans-2025-north-full.md
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claude 54094a0d43 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.
2026-06-10 08:35:50 -04:00

3.8 KiB

Soybean yield trial — Iowa North District (Full Season), 2025

  • Source: Iowa Crop Performance Tests (independent third-party trial)
  • Publisher: Iowa State University / Iowa Crop Improvement Association
  • Crop: Soybean
  • State: IA
  • District: North
  • Maturity season: Full Season
  • Year: 2025
  • Experiment mean yield: 66.3 bu/a
  • Cooperator sites: Sutherland, Pocahontas, Corwith, Marble Rock, Oelwein
  • URL: https://www.croptesting.iastate.edu/Soybean/SoybeanDistrict2.aspx

Results (by yield, all brands)

Rank Company Entry Traits MG Yield WestYield EastYield Sutherland Pocahontas Corwith Marble Rock Oelwein
1 LOYAL BRAND L2560E E3 2.5 71.6 68.4 71.8 72.6 69.7 62.9 79.2 73.5
2 Renk G2300E E3 2.3 70.8 69.1 71.4 70.5 70.2 66.8 71 76.5
3 Nutech/G2 Genetics 25N05E E3 2.5 69.4 67 68.7 69.6 72.1 59.4 71.8 74.9
4 Xitavo XO 2366E E3 2.3 68.9 66.1 69.1 67.5 69.9 61 73.9 72.5
5 Viking/Blue River 27B4 Conv 2.7 68.8 65.5 68.7 72.4 63.1 60.9 70.9 74.2
6 P3 Genetics 2523E E3 2.2 68.5 66.3 67.3 66.7 73.2 58.9 73.5 69.3
7 Golden Harvest GH2626XF RR2XF 2.6 68.5 68.6 66 73.3 70.8 61.9 67.2 68.9
8 Cornelius CB22XF52 RR2XF 2.2 68.5 65.6 65.7 74.9 72.6 49.4 80.3 67.3
9 Renk RS255NXF RR2XF 2.5 68.3 65 69 68.8 65 61.2 77.6 68.1
10 LOYAL BRAND L2380E E3 2.3 68.2 65.4 68.2 67.8 68.8 59.7 73.1 71.8
11 Pioneer P25A16E E3 2.5 68.1 65.1 67.4 68.8 67.8 58.7 70.7 72.9
12 LOYAL BRAND L2770E E3 2.7 68.1 66.3 67.1 66.9 71.2 60.7 72 68.5
13 Xitavo XO 2735E E3 2.7 68 64.2 68.9 66.6 67.6 58.4 75.3 72.9
14 Renk RS266E E3 2.6 67.9 66.1 67 72 66 60.3 69.3 71.6
15 Xitavo XO 2556E E3 2.5 67.7 65.8 66.8 70.7 68.4 58.3 67.8 74.3
16 Golden Harvest GH2406XF RR2XF 2.4 67.6 65 65.3 69.4 73.3 52.4 70.6 72.8
17 LOYAL BRAND L2370E E3 2.2 67.4 66 64.4 68.9 73.7 55.3 70.8 67.2
18 P3 Genetics 2623E E3 2.3 67.3 65.1 66.4 68.8 67.7 58.6 69.3 71.2
19 Renk G2790E E3 2.7 67.1 63.6 66.7 65.9 69.8 55.1 71.2 73.9
20 Renk G2480E E3 2.4 66.8 67.2 65.6 68 69.6 64 64.9 68
21 Asgrow AG25XF5 RR2XF 2.5 66.7 64.8 66.9 63.3 69.1 62.1 69.4 69.2
22 Viking/Blue River 23B5 Conv 2.3 66.7 64.7 66.4 69.3 65.8 59.1 71.8 68.2
23 ISU IAS27C3 Conv 2.7 66.2 62.3 67.5 67.6 62.2 57 75.6 70
24 ISU IAS25C2 Conv 2.5 64.5 63.4 62.1 67.9 69.3 52.9 66.4 66.9
25 Cornelius CB27C10 Conv 2.7 64.1 60 63.5 65.1 64.4 50.4 69.6 70.6
26 Dyna-Gro S23EN05 E3 2.3 63.6 61.4 63.2 61 68.1 55.1 69.4 65.1
27 Cornelius CB25C10 Conv 2.5 63.2 61.4 61.5 66.3 65.7 52.2 67.3 65.2
28 Pioneer P23A40E E3 2.3 62.6 61 60 67.4 66.1 49.4 69.4 61.2
29 Confluence Genetics BX27Q266 Conv 2.7 58.6 56.9 57.3 62.8 58.3 49.6 63.8 58.5
30 Confluence Genetics BH23H228 Conv 2.3 55.2 53.6 52.4 57.9 61.4 41.5 61.9 53.8
31 Confluence Genetics N2358 Conv 2.3 54.2 52 52.8 56.1 56.5 43.4 56.9 58

Top 5 by Yield: L2560E (LOYAL BRAND) 71.6, G2300E (Renk) 70.8, 25N05E (Nutech/G2 Genetics) 69.4, XO 2366E (Xitavo) 68.9, 27B4 (Viking/Blue River) 68.8.