Feng - what?

I do like a bit of Feng Shui. As with everything I take bits of what I like. i do believe a clean, tidy home makes a comfortable home. I'm not sure about the relationship/wealth corners thing though. I read that you shouldn't have compost heap in your prosperity corner of your garden. Why not? Compost is good for the soil and makes things grow, it nourishes. Wouldn't it be good to have that anywhere?