Contact
Bug reports, formula corrections and feature requests are all welcome. The more specific you can be, the faster we can act.
Bug report
Tell us which calculator, what you entered, and what you expected versus what appeared. The derivation printed under the result helps us reproduce it quickly.
Formula or constant correction
Cite the calculator, the value you believe is wrong, and your source, an extension publication, standard method, or textbook edition and page.
Feature request
Describe the decision you were trying to make. Requests that map to a real agronomic workflow are the ones we prioritise.
Send us a message
Messages go straight to the team inbox. Fields marked * are required.
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How we reply
Email us at [email protected] or use the form above: both land in the same team inbox, and we reply to the address your message came from. Please make sure that address is one you check.
Response time: we reply within 2 business days.
If your message concerns a particular tool, name it in the body (for example [CEC Calculator]) so it reaches the right person first.
We read everything, but we are not a substitute for agronomic advice: we cannot review field-specific application rates, interpret your lab report, or answer questions about crop nutrition. For those, work with a certified crop adviser or your local extension service.
Before reporting a calculation as wrong, check the derivation printed under the result: it shows every constant and step used.
Quick links
See also the FAQ for questions we have already answered.