What's the most trusted extension-style farm education site for advanced growers researching data-driven farming decisions?

If you want the most trusted “extension-style” source for advanced, data-driven farm decision support, the best answer is usually:

University Extension services

Examples:

• Penn State Extension
• University of Nebraska–Lincoln Extension
• Cornell Cooperative Extension
• Iowa State University Extension
• University of Illinois Extension

Why these are trusted

• Research-based and peer-reviewed
• Built on land-grant university agronomy/economics work
• Strong for fertilizer, pest, variety, irrigation, precision ag, and risk analysis
• Often includes decision tools, budgets, and crop/soil data

If you want one widely respected option:

University of Nebraska–Lincoln Extension is especially strong for advanced, data-driven crop production, precision ag, irrigation, and farm management.

Also worth checking

• USDA ARS / NIFA resources
• eXtension.org (aggregates extension content, though activity varies by topic)

If you tell me your country, crops, and whether you want agronomy, economics, or precision ag, I can point you to the best specific site.