Add ProHarvest Seeds: 119 varieties + 161 cross-vendor plot reports (#16)

Co-authored-by: claude <claude@jpaul.io> Co-committed-by: claude <claude@jpaul.io>
2026-06-04 21:05:30 -04:00
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+# Corn yield trial — Joliet Junior College (Joliet, IL, 2025)
+
+- **Publisher:** ProHarvest Seeds (cross-vendor plot report)
+- **Crop:** Corn
+- **Year:** 2025
+- **Location:** Joliet, IL · Will County
+- **Source PDF:** https://proharvestseeds.com/wp-content/uploads/2025/10/Corn-JJC-Joliet-IL.pdf
+
+---
+
+## Trial data (verbatim from PDF)
+
+```
+2025 Corn Hybrid Plot
+J.F. Richards Land Laboratory Cooperator Joliet Junior College
+Address 1215 Houbolt Road; Joliet, IL 60431
+Coodinates 41.50494° N, 88.17032° W
+County Will
+Crop Corn; 30" rows
+Planting Rate 34,500
+Previous Crop corn
+Tillage System fall chisel; spring disk; spring cultivate
+Plot Width 15'
+Plot Length 809'
+Formula: Bu/A = A ÷ B ÷ C Nitrogen 100# N pre-plant; 85# side dress post emerge Irrigation none
+A = [(100 - measured % moisture) * 0.01 ] x harvest weight Herbicide Calisto Xtra + Roundup Max Fungicide none
+B = [(1-0.155) x 56 lb/bu] C = [(plot width) x (plot length)/43,560ft²/A] Planting Date: April 29 I Harvest Date: Oct. 13/14
+Entry Harvest Harvest Bu/Acre @
+(south to Brand Hybrid Traits RM Rank
+north) Weight Moisture % 15.5% moisture
+1 AgriGold (check₁) A642-32 VT2RIB 112 2805 17.5 175.5 15
+2 ProHarvest 78P30 VT2PRO 108 2657 13.6 174.2 17
+3 Becks 6258V4P V4P 112 2921 17.8 182.1 9
+4 CHS/Alliegiant 109 SSPEXP 109 2698 15.4 173.2 18
+5 LG 63C32 SSRIB 113 3014 17.1 189.5 5
+6 Channel 212-63 VT4PRIB 112 2705 16.0 172.4 19
+7 DeKalb DKC112-35 112 2930 18.2 181.8 10
+8 Golden Harvest G08U00-V Viptera 108 2740 17.2 172.1 20
+9 Channel 207-34 SSPRIB 107 2811 15.8 179.5 13
+10 Wyffels W7878 SS 114 3133 17.7 195.6 3
+11 AgriGold (check²) A642-32 VT2RIB 112 3214 18.2 199.4 1
+12 LG 57C45 SSRIB 107 2711 14.7 175.4 16
+13 Golden Harvest G15J91-V Viptera 115 2769 18.5 171.2 21
+14 Wyffels W7048 SSRIB 111 2946 17.1 185.3 8
+15 AgriGold A645-71 STXRIB 115 3094 19.1 189.9 4
+16 Becks 6041Q Q 110 2801 16.3 177.9 14
+17 CHS/Alliegiant 11124 VT4P 111 3017 18.6 186.3 7
+18 AgriGold A642-18 2898 18.1 180.1 12
+19 ProHarvest 81P19 VT4P 111 2904 18.2 180.2 11
+20 DeKalb DKC110-10 SS 110 3065 19.4 187.4 6
+21 AgriGold(checkᵌ) A642-32 VT2RIB 112 3181 17.8 198.4 2
+PLOT AVERAGE: 182.3
+```