Files
seed-mcp/corpus/iowa_icpt_trials/icpt-soybeans-2025-north-early.md
T
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

3.1 KiB

Soybean yield trial — Iowa North District (Early 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: Early Season
  • Year: 2025
  • Experiment mean yield: 64 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 Nutech/G2 Genetics 22N04E E3 2.2 68.3 65.4 67.3 72.6 67.1 56.4 74.1 71.4
2 Nutech/G2 Genetics 21N09E E3 2.1 67.9 65 66.9 68.3 71.7 55.1 74.8 70.8
3 LOYAL BRAND L2130E E3 2.1 66.8 65.5 65.4 67.8 70 58.7 74.7 62.7
4 Viking/Blue River 2022N Conv 2 66.7 65.6 64.7 69.1 71.5 56.3 71.6 66.3
5 Golden Harvest GH2292E3 E3 2.2 66.5 65.8 63.6 70.1 71.9 55.3 71.4 64.2
6 Pioneer P21A53E E3 2.1 66.4 64 63.6 73.2 67.3 51.4 73.9 65.5
7 Asgrow AG22XF5 RR2XF 2.2 65.4 66.1 63.4 69.4 69.1 60 64.7 65.7
8 LOYAL BRAND L2070E E3 2 64.6 63.9 60.7 68.8 72.5 50.4 74.1 57.6
9 Renk G2090E E3 2 64.4 62.5 61.9 69.5 66.7 51.4 72 62.3
10 Asgrow AG22XF6 RR2XF 2.2 64.3 64.9 61.5 69.9 67.8 57 66.1 61.5
11 Golden Harvest GH2004XF RR2XF 2 64.2 61.9 62.6 64.8 68.8 52.2 69.4 66.1
12 P3 Genetics 2520E E3 2 64 60.6 61.8 66.9 67.6 47.3 77.4 60.6
13 Cornelius CB20XF39 RR2XF 2 63.9 63.3 59.6 73.2 67.8 49 70.3 59.5
14 Xitavo XO 1776E E3 1.7 63.8 63.5 60.2 70 69.2 51.4 67.9 61.3
15 Xitavo XO 2206E E3 2.2 63.6 60.9 62.9 64.9 63.6 54.2 74.3 60.1
16 Cornelius CB19C30 Conv 1.9 63.6 60.6 62.9 65.9 64.8 51 73.8 63.9
17 P3 Genetics 2419E E3 1.9 63.6 61.1 61.8 68.3 64.9 50 72.2 63.4
18 Xitavo XO 2075E E3 2 63.2 62.7 59.9 69.7 67.6 50.8 67 62
19 Dyna-Gro S20EN46 E3 2 63.1 61.4 59.5 68.4 68.2 47.7 70.6 60.2
20 Xitavo XO 1986E E3 1.9 62.6 60.3 60.4 66.6 64.8 49.6 63.4 68.2
21 Pioneer P18A73E E3 1.8 61.8 59.4 59 65.8 67.6 44.8 68.6 63.6
22 Renk RS194NXF RR2XF 1.9 61.2 60 56.7 71 65.3 43.9 65.7 60.6
23 P3 Genetics 2218E E3 1.8 59.1 57.6 55 64.1 67.3 41.3 60.7 63.1
24 LOYAL BRAND L2160E E3 2.1 56.9 57 53.7 62.2 61.2 47.8 60.6 52.6

Top 5 by Yield: 22N04E (Nutech/G2 Genetics) 68.3, 21N09E (Nutech/G2 Genetics) 67.9, L2130E (LOYAL BRAND) 66.8, 2022N (Viking/Blue River) 66.7, GH2292E3 (Golden Harvest) 66.5.