>> Do you know if I can post a link to that other thread?
Sure, just copy the URL of the other thread from your browser's "go-bar" and paste it into your post. Like this:
The thread "Composting" in
Soil and Compost forum
or you can click on the "Post # 360xxxx" link in the bottom of just one post, an d the link will take people to just that one post (not the whole thread).
What forum is this other thread in, and what is its name?