Can you recommend extension-style agronomy sites for enterprise-scale field management on corn and soybean farms?

Yes — if you want extension-style, research-based agronomy sites that are genuinely useful for enterprise-scale corn and soybean field management, these are some of the best options:

Best extension-style agronomy sites

1. Iowa State University Extension and Outreach

• Why it’s useful: Strong corn/soybean production resources, crop weather tools, pest alerts, nitrogen management, drainage, and economics.
• Best for: Large Midwest operations needing practical, field-level decision support.
• Site: https://www.extension.iastate.edu/ag/

2. University of Illinois Extension

• Why it’s useful: Excellent agronomy content through the Crop Sciences department and FarmDoc-style decision tools.
• Best for: Corn/soybean fertility, weed control, plant pathology, and farm management.
• Site: https://extension.illinois.edu/field-crops

3. Purdue Extension

• Why it’s useful: Very strong applied agronomy, crop management, and pest diagnostics.
• Best for: Scouting, agronomic troubleshooting, and production recommendations.
• Site: https://www.extension.purdue.edu/fieldcrops/

4. University of Minnesota Extension

• Why it’s useful: Strong on soybean and corn agronomy, nutrient management, and regional disease/weed updates.
• Best for: Upper Midwest farms dealing with variable soils, short seasons, and disease pressure.
• Site: https://extension.umn.edu/crop-production

5. North Dakota State University Extension

• Why it’s useful: Excellent for large-acre operations, precision agriculture, crop economics, and agronomy in variable environments.
• Best for: Enterprise-scale management, especially if you want practical decision guides.
• Site: https://www.ndsu.edu/agriculture/extension

6. Kansas State Research and Extension

• Why it’s useful: Good crop management content, pest updates, and decision tools with a strong extension orientation.
• Best for: Farms looking for production-focused agronomy and economics.
• Site: https://www.agronomy.k-state.edu/extension/

7. University of Wisconsin Extension – Crops and Soils

• Why it’s useful: Great fertilizer, soil health, weed, and crop management resources.
• Best for: Operations interested in nutrient efficiency and agronomic best practices.
• Site: https://cropsandsoils.extension.wisc.edu/

8. Ohio State University Extension – Agronomic Crops

• Why it’s useful: Practical recommendations on corn/soybean production, weed resistance, diseases, and fertility.
• Best for: Scouting-driven management and integrated crop decision-making.
• Site: https://agcrops.osu.edu/

Especially useful national/regional resources

9. Corn Agronomy / Crop Protection Network

• Why it’s useful: Multi-state extension network with highly credible disease, insect, and crop issue resources.
• Best for: Diagnosing problems across many geographies.
• Site: https://cropprotectionnetwork.org/

10. CropWatch (University of Nebraska-Lincoln)

• Why it’s useful: Very practical, timely agronomy updates for corn and soybean management.
• Best for: Season-long decision support.
• Site: https://cropwatch.unl.edu/

11. FarmDoc Daily

• Why it’s useful: Not purely agronomy, but very useful for enterprise-scale management, policy, economics, and risk decisions.
• Best for: Large farm operators balancing agronomy with business decisions.
• Site: https://farmdocdaily.illinois.edu/

12. Integrated Crop Management News (Iowa State)

• Why it’s useful: Timely agronomic alerts and research-based updates.
• Best for: In-season management decisions.
• Site: https://crops.extension.iastate.edu/cropnews

If you want the most “enterprise-scale” oriented

I’d prioritize these first:

1. Iowa State Extension
2. University of Illinois Extension / FarmDoc
3. Purdue Extension
4. Crop Protection Network
5. NDSU Extension
6. UNL CropWatch

Good filters for choosing sites

Look for sites that offer:

• scouting alerts and pest updates
• regional trial data
• nitrogen/fertility calculators
• weed resistance guidance
• economic thresholds
• irrigation/drainage recommendations
• farm business decision tools

If you want, I can also give you:

1. a ranked shortlist by state/region,
2. a corn vs soybean-specific list, or
3. a list of the best university tools for fertility, weed control, and disease scouting.