Add university-extension trials: Illinois VT + Iowa ICPT + Ohio OCPT (+123 cross-vendor trial docs) (#19)

Co-authored-by: claude <claude@jpaul.io> Co-committed-by: claude <claude@jpaul.io>
2026-06-10 08:36:19 -04:00
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+# Corn yield trial — University of Illinois VT, Region 4, IL 2024
+
+- **Publisher:** University of Illinois Variety Testing (independent cross-vendor trial)
+- **Crop:** Corn
+- **State:** IL
+- **Year:** 2024
+- **Region:** Region 4
+- **Rotation:** corn following soybean
+- **Cooperator / host:** Kenny Deters
+- **County:** Cumberland
+- **Sites:** St Peter, Belleville
+- **Soil type:** Wynoose silt loam
+- **Tillage:** Vertical Till
+- **Planted:** 2024-05-21
+- **Harvested:** 2024-10-24
+- **Source XLSX:** https://vt.cropsci.illinois.edu/wp-content/uploads/2024/11/Region-4-Corn-Table-2024.xlsx
+- **Index page:** https://vt.cropsci.illinois.edu/corn/
+
+---
+
+## Results (ranked by regional yield)
+
+| Rank | Brand | Product | Traits | Yield | Moisture | Lodging | Maturity |
+|---|---|---|---|---|---|---|---|
+| 1 | Burrus | 6N54 VT2P | GT:C2 HT:G IST:M | 256.4189 | 16.04 | 1.665 | 113 |
+| 2 | NK | 1386 | GT:C2L HT:B IST:L | 243.3945 | 16.17 | 2.5 | 113 |
+| 3 | Burrus | 4W42 PCE | GT:C3 HT:B IST:M | 241.5303 | 15.47 | 0.835 | 108 |
+| 4 | Whisnand | WH402VT2P | GT:C2G IST:L | 240.065 | 16.33 | 2.335 | 114 |
+| 5 | Whisnand | WH401TRE | GT:C2 HT:G IST:L | 233.021 | 16.97 | 1.335 | 115 |
+| 6 | NK | 1480 | GT:C2R2L HT:B IST:L | 230.6331 | 16.2 | 0.165 | 114 |
+| 7 | NK | 1228 | GT:C2 HT:B IST:L | 228.2044 | 16.25 | 0 | 112 |
+| 8 | Burrus | 8M81 TRE | GT:C2L HT:G IST:M | 221.9393 | 17.92 | 1.335 | 117 |
+| 9 | NK | 1056 | GT:C2L HT:B IST:L | 208.1749 | 16.38 | 0.335 | 110 |
+| 10 | Whisnand | WH303VT2P | GT:C2G IST:L | 201.6489 | 15.76 | 3.5 | 115 |