and US territories,
http://www.csrees.usda.gov/Extension/index.html Cooperative Extension System Offices
This section of our Web site will help you find your nearest Cooperative Extension office. The Cooperative Extension System is a nationwide, non-credit educational network. Each U.S. state and territory has a state office at its land-grant university and a network of local or regional offices. These offices are staffed by one or more experts who provide useful, practical, and research-based information to agricultural producers, small business owners, youth, consumers, and others in rural areas and communities of all sizes.
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Agricultural Extension services provide news and advice about all things relative to agriculture
in your area.
I use it for the latest info on plant diseases that are relevant in this growing season.
I hope you find the info relevant to your particular problems.
In my neck of the woods the information I get from Cornell University(NY) is up to date and
relevant.
you should try it too.