Hi Kate, Here in Seattle we have very clayey soils. At least I do. Only rarely does it dry out enough into that hard crusty soil. The rest of the time it's just a soggy mess! Hey did I mention that I'm moving back to Austin Texas? Hah well it's a whole other set of gardening challenges there. Anyway, from my experience, it is very difficult ...

Sorry, I can't help with the distinctions, but I'm curious about how you use the stuff. I've been digging sand into my very clayey soil recently, after years of adding compost and still having the dirt harden on me as the season advances. I've run into some real disagreements about the value of adding sand; some experts say it will lead to ...