Add 4 independent seed brands: Latham + Stine + 1st Choice + Burrus (+623 varieties) (#17)

Co-authored-by: claude <claude@jpaul.io> Co-committed-by: claude <claude@jpaul.io>
2026-06-04 21:58:07 -04:00
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+# LH 3690 CNV-NON RETURNABLE
+
+- **Vendor:** Latham Hi-Tech Seeds (independent family-owned, Alexander, IA)
+- **Brand:** Latham Hi-Tech Seeds
+- **Crop:** Corn
+- **Relative maturity:** 86 days
+- **Trait(s):** CNV
+- **Source:** https://www.lathamseeds.com/products/lh-3690-cnv/
+- **Rating scale:** numeric ratings ~1-9 where LOWER = BETTER (1 = best / most tolerant / most resistant); confirmed by cross-referencing Product Overview prose vs values (top-rated stalks/roots cluster 1.0-1.5, weak traits 3.0-3.5, none approach 9). Categorical values pass through verbatim (SCN source 'PI 88788', Phytophthora 'Rps 1k', Anthracnose 'ASR', 'Medium Tall', 'Flex'). NA/blank = not rated.
+- **Service area:** Latham dealer network — Upper Midwest (IA/MN/WI/IL/ND/SD/NE)
+
+---
+
+_LH 3690 shows excellent top-end yield potential when kept on highly-managed acres and good fertility. Take advantage of your early planting window or reduced tillage with improved early plant vigor and great stalk quality. Big, girthy ears plus the ability to handle higher plant populations – combined with top production practices – equals big yields._
+
+---
+
+## Agronomic Characteristics
+
+- **Emergence:** 2.0
+- **Flowering for Maturity:** Equal
+- **Early Vigor:** 2.0
+- **Stalk Strength:** 2.0
+- **Root Strength:** 2.5
+- **Stay Green:** 2.0
+- **Drydown:** 2.0
+- **Test Weight:** 2.5
+- **Drought Tolerance:** 3.0
+- **Herbicide Sensitivity:** Slight SU
+- **Suggested Population:** 32-36
+- **Corn-on-Corn:** 4.0
+- **Ear Height:** Medium
+- **Ear Type:** Semi-Determinate
+- **Number of Kernel Rows:** 18-20
+- **Cob Color:** Red
+- **Husk Cover:** Long
+- **Shank Length:** Medium
+- **Leaf Angle:** Semi-Upright
+
+## Disease Ratings
+
+- **Goss’s Wilt:** 3.0
+- **Common Rust:** 2.0
+- **Northern Leaf Blight:** 2.5
+- **Eye Spot:** 2.0
+- **Gray Leaf Spot:** 3.5