Files
seed-mcp/corpus/latham/latham-lh-4438-ss-pro.md
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claude 9600235466 Add 4 independent seed brands: Latham, Stine, 1st Choice, Burrus (+623 varieties)
Four independent regional brands across IA/IN/IL (variety-identity sources,
each parsed into structured characteristics_groups so ratings embed):

- latham (264: 155 corn + 109 soy) — Latham Hi-Tech Seeds, Alexander IA.
  WordPress REST enum (/wp-json/wp/v2/varieties) + /products/<slug>/ detail
  HTML. Scale 1-9 LOWER=better (reversed, like NK/AgriPro).
- stine (217: 58 corn + 159 soy) — Stine Seed, Adel IA (largest US
  independent). sitemap enum + /{crop}/traits/<slug>/<code>/ detail HTML.
  Corn 1-9 (9=best); soy qualitative.
- first_choice (78: 52 corn + 22 soy + 4 wheat) — 1st Choice Seeds,
  Rushville IN (employee-owned). Per-crop sitemap -> detail HTML. Scale
  0-10 higher=better. ~40 older corn pages thin at source; wheat
  identity-only.
- burrus (64: 38 corn + 26 soy) — Burrus Seed, Arenzville IL. Seedware
  JSON API. Scale 1-10 (10=best). Brands Burrus/Power Plus/DONMARIO.
  robots ai-train=no + named-bot blocks; operator opted in, scraper uses a
  non-blacklisted UA + honors Crawl-delay 10.

All 623 validated through rag.chunk.chunks_from_variety (0 errors; 6
identity-only pages from source gaps). No chunk.py change needed (identity
sources auto-route to chunks_from_variety).

Docs:
- sources.json: 4 entries + Hoegemeyer added to _excluded_sources. The
  Corteva ToU (shared across pioneer.com / hoegemeyer.com / therightseed.com
  / corteva.com + the Vylor spinoff) bans scrapers + competitive use, so the
  whole Corteva family is one excluded ToU domain.
- docs_mcp/lessons.md: rating-scales updated with all 4 directions +
  an explicit cross-vendor warning (Latham 1=best vs Stine/Burrus higher=best
  — never compare raw numbers without _scale_direction).
- README + CLAUDE corpus inventory: now 2,268 variety + 6,787 trial records.

CI rebuilds the index from the committed corpus.
2026-06-04 21:57:30 -04:00

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# LH 4438 SS PRO RIB
- **Vendor:** Latham Hi-Tech Seeds (independent family-owned, Alexander, IA)
- **Brand:** Latham Hi-Tech Seeds
- **Crop:** Corn
- **Relative maturity:** 94 days
- **Trait(s):** Smart Stax Pro
- **Source:** https://www.lathamseeds.com/products/lh-4438-ss-pro/
- **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)
---
_With medium plant stature and girthy, flex ear style, this hybrid performs best in its maturity zone and north. It has good green snap tolerance and dry down. LH 4335 VT2 PRO RIB will perform best at medium populations. Improved agronomics over the VT2 PRO version makes it a great fit for corn-on-corn rotations._
---
## Agronomic Characteristics
- **Early Vigor:** 2.0
- **Stalk Strength:** 1.0
- **Root Strength:** 1.0
- **Stay Green:** 2.0
- **Drydown:** 1.0
- **Test Weight:** 2.0
- **Drought Tolerance:** 2.0
- **Foliar Fungicide:** 1.5
- **Corn-on-Corn:** 2.0
- **Ear Height:** Medium
- **Ear Type:** Flex
## Disease Ratings
- **Gosss Wilt:** 2.0
- **Northern Leaf Blight:** 2.0
- **Anthracnose Stalk Rot:** ASR
- **Gray Leaf Spot:** 2.0