Find Your State's Cooperative Extension Service!
The CA link seems to be not working - https://ucanr.edu/
When I google it I get the same link and it still fails.
That said, I can find University and regional programs through UC Davis, San Diego, etc. But any links on those sites back to ucanr.edu seem to be broken.
I tried to connect to the county soil testing site for Montana (extn.msu.montana.edu) and it came up blank.. Thank you I will research the right one and let you know.
As of this writing, the MSU website says, “Due to ongoing network issues, the MSU Extension store and other web pages are unavailable. Direct questions to MSUExtension@montana.edu” Also, here is the page with extension offices: https://ucanr.edu/About/Locations/
The Master Gardener program is usually administered by the extension service in each county under the state wide supervision of the designated university. If you are at all interested in gardening, I urge you to look into this program. There is a lot of time and work involved, but the benefits and knowledge that you gain by this experience is well worth it. It is a good way to give back to the community, make new friends and learn about gardening in your area. I have been a Master Gardener for nine years and have never regretted getting involved for a minute.