There is no Twitter IM or Groups on the official website. You may receive invitations from friends who are already on Twitter via email.
Yes, there are likely to be farmers on Twitter. Anyone, provided they're aged 13+, can make a Twitter account.
You search 'twitter' in google, go to the first link, and set up an account. To start off, you just click in the box underneath where it says 'What are you doing?' and type in what you are...
A lot of people have a Twitter. Four out seven people in the world have a Twitter.
you let everyone know what youre doing. tell them how your day is going and can just complain about how horrible or wonderful your life is.