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seed-mcp/corpus/iowa_icpt_trials/icpt-corn-2024-south-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

4.0 KiB

Corn yield trial — Iowa South District (Full Season), 2024

  • Source: Iowa Crop Performance Tests (independent third-party trial)
  • Publisher: Iowa State University / Iowa Crop Improvement Association
  • Crop: Corn
  • State: IA
  • District: South
  • Maturity season: Full Season
  • Year: 2024
  • Experiment mean yield: 218 bu/a
  • Cooperator sites: Atlantic, Corning, Milo, Batavia, Crawfordsville
  • URL: https://www.croptesting.iastate.edu/corn/CornDistrict2.aspx

Results (by yield, all brands)

Rank Company Entry Traits RM Yield Yldp Moist Wyld Eyld Atlantic Corning Milo Batavia Crawfordsville
1 Dekalb DKC114-42SSPRIB LL,RR2 SSP-RIB 114 230.2 105.2 17.5 240.1 217.7 253 238.2 229.1 256.6 167.6
2 Prairie Hybrid Seeds 7445 - 112 227.3 103.8 16.3 227.3 221.5 248.2 231.7 201.9 289.6 173.1
3 Cornelius Seed 6D72 VT2P RR2 VT2P 114 226.8 103.6 16.8 229.9 225.6 244.8 217 227.9 263.6 185.4
4 Cornelius Seed C7366DGDP RR2 DGVT2P 113 225.4 103 15.7 220.3 225.5 218.4 225.9 216.5 270 189.9
5 Viking/Blue River 78-13 - 113 225.4 103 17.4 224.8 215.5 242.8 226.6 205 267 174.5
6 Renk RK876VT2P RR2 VT2P-RIB 113 224.3 102.5 15.9 224.7 222.8 242.6 216.7 214.8 264.4 189.1
7 Dekalb DKC112-12TRERIB LL,RR2 TRE-RIB 112 223.6 102.2 16.5 230.9 223.7 231.3 221.1 240.3 262.2 168.6
8 Renk RK921VT2P RR2 VT2P 115 221.5 101.2 16.6 226.2 216 236.5 222.2 220 257.9 170.1
9 Dyna-Gro D56TC44RIB RR2 TRE-RIB 116 220.7 100.8 16.3 221.3 214.4 250.1 214.2 199.5 265.9 177.9
10 Latham LH 6445 VT2 PRO RR2 VT2P 114 220.6 100.8 17 219.8 218 233 214.3 212.1 252.3 189.7
11 NuTech/G2 Genetics 74A5PCE LL,RR2 PCE 114 219.8 100.4 16.4 220.2 220.1 235.9 207 217.7 265.6 177
12 Renk RK958VT2P RR2 VT2P-RIB 115 219.8 100.4 16.8 219 215 238.3 205 213.8 253.5 177.8
13 NuTech/G2 Genetics 73A4AM LL,RR2 AM 113 219.7 100.4 16.6 218.6 207.9 243.8 232.8 179.3 274 170.5
14 Pioneer P1366Q LL,RR2 Qrome 113 219.5 100.3 15.9 221.7 207.4 246.1 223.2 195.8 253.2 173
15 Dyna-Gro D53VC54RIB RR2 VT2P-RIB 113 219.2 100.1 16.5 223.5 215.6 231.1 221.7 217.6 259.9 169.2
16 NuTech/G2 Genetics 75C1PCE LL,RR2 PCE 115 218.8 99.9 17.6 224.7 207.1 241.2 228 205 243.2 173
17 Cornelius Seed C7590DP RR2 VT2P 115 217.9 99.5 16.6 221.3 218 230.5 210.9 222.7 252.2 179
18 Pioneer P1563Q LL,RR2 Qrome 115 217.9 99.6 17.4 217 212.3 242.6 215 193.4 252.5 191.1
19 Latham LH 6306 PCE LL,RR2 PC-RIB 113 215.4 98.4 16.1 213.4 210.2 236 207.5 196.6 270.9 163.2
20 Latham LH 6338 SS PRO RR2 SSP 113 215 98.2 16.9 225.4 206.9 236.6 225.7 213.9 252.4 154.4
21 NK Seeds NK1386-VZ GT,LL VZ 113 213.7 97.6 16.7 217.4 204.5 240.9 219.7 191.7 239.3 182.5
22 NK Seeds NK1228-AA GT,LL AA 112 213.4 97.5 16.4 213 208.8 234.9 201.9 202.2 257.9 166.3
23 NK Seeds NK1307-DV GT,LL DURV 113 209.5 95.7 16.8 207.2 203.7 237.1 209.9 174.5 247.6 189.2
24 Cornelius Seed C7308TRE RR2 TRE-RIB 113 208.1 95.1 15.6 204.4 200 223.8 209.1 180.3 251.2 168.5
25 Prairie Hybrid Seeds 9703 - 116 198.9 90.8 18 203.4 196.7 205.5 204.4 200.4 242.4 147.3

Top 5 by Yield: DKC114-42SSPRIB (Dekalb) 230.2, 7445 (Prairie Hybrid Seeds) 227.3, 6D72 VT2P (Cornelius Seed) 226.8, C7366DGDP (Cornelius Seed) 225.4, 78-13 (Viking/Blue River) 225.4.