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 2025
+
+- **Publisher:** University of Illinois Variety Testing (independent cross-vendor trial)
+- **Crop:** Corn
+- **State:** IL
+- **Year:** 2025
+- **Region:** Region 4
+- **Rotation:** corn following soybean
+- **Cooperator / host:** Emmerick Farms
+- **County:** Fayette
+- **Sites:** St Peter, Belleville
+- **Soil type:** Wynoose silt loam
+- **Tillage:** Vertical Till
+- **Planted:** 2025-06-02
+- **Harvested:** 2024-10-24
+- **Source XLSX:** https://vt.cropsci.illinois.edu/wp-content/uploads/2025/11/Region-4-Corn-Table-2025.xlsx
+- **Index page:** https://vt.cropsci.illinois.edu/corn/
+
+---
+
+## Results (ranked by regional yield)
+
+| Rank | Brand | Product | Traits | Yield | Moisture | Lodging | Maturity |
+|---|---|---|---|---|---|---|---|
+| 1 | Prairie | 8786 | - | 196.65 | 13.27 | 0 | 115 |
+| 2 | Burrus | 5C11 PCE | GT:C HT:B IST:M | 184.2 | 12.87 | 0 | 110 |
+| 3 | Burrus | 8K34 VT2P | GT:C HT:G IST:M | 177.59 | 14.15 | 0 | 116 |
+| 4 | Whisnand | WH403TRE | GT:C2L HT:G IST:L | 166.28 | 12.47 | 0 | 115 |
+| 5 | Prairie | 6854 | - | 157.49 | 12.25 | 0 | 110 |
+| 6 | Whisnand | WH304SS | GT:CRL HT:B IST:L | 157.45 | 12.78 | 0.33 | 112 |
+| 7 | Whisnand | WH303VT2P | GT:C2L HT:G IST:L | 157.26 | 12.97 | 0.17 | 115 |
+| 8 | Whisnand | WH402VT2P | GT:C2L HT:G IST:L | 155.69 | 12.85 | 0 | 114 |
+| 9 | Burrus | 7B14 PCE | GT:C HT:B IST:M | 152.92 | 13.02 | 0.33 | 114 |
+| 10 | Prairie | 7445 | - | 145.71 | 12.12 | 0 | 113 |
+| 11 | Prairie | 6436 | - | 137.95 | 12.45 | 0 | 111 |