Janice Person posted a question about using a new hash tag, #agblog, to help people discover agriculture blogs. Below is my comment.
Using #agblog as a Twitter hash tag paired with a tweet about an ag related blog (example: "Got a Farm Blog? #AgBlog it http://agtoday.us/bkLXu3 ") is different from a blog post that has been tagged by the writer with #agblog. On re-reading JP's thoughts, I think what she is really suggesting is using Twitter to highlight links to new ag blog posts, with the hash tag #agblog being the grouping element.