Last updated: October 29, 2026.
Permitted use
You may use the website and its calculators for personal, educational, and ordinary farm-planning purposes. Do not attempt to disrupt the site, interfere with its security, or misrepresent estimates as professional certification or official recommendations.
Accuracy and responsibility
You are responsible for the values you enter and for verifying all outputs. The site provides estimates and educational content only. Read the Disclaimer before relying on a calculator for field operations, crop protection, financial decisions, livestock management, or regulatory compliance.
Intellectual property
Website text, layout, page organization, and code are provided by the site owner unless a third-party source is named. Publicly available formulas and conversions are not claimed as original scientific discoveries. Do not republish substantial site text or present the site as an official university or government product without permission.
External links and services
External links are provided for convenience. Their terms and privacy policies apply when you use those services. The contact form is delivered through a third-party service and depends on its configuration and continued availability.
Changes and contact
We may update pages, calculators, formulas, or these terms as tools are corrected or expanded. To report an error or ask a question, use the Contact Us page.