If I read this right, you have clay soil, a steeper sidehill, plowed it when it was wet (because it never dries out) and now you have clods that don't break up even with the tiller.
Yup, I'd say that is right. /forums/images/graemlins/smile.gif /forums/images/graemlins/smile.gif /forums/images/graemlins/wink.gif
Here is _the_ problem. Water rains down, enters the poorer soil at the top of your hill rapidly, filters down to the clay layer, and then follows the clay to where it totally saturates the ground and has to bleed out of the ground - usually somewhere about the middle of a hillside. This will continue to bleed out for weeks & weeks, every rain will recharge the weeping sidehill. It's really a mini-spring. The sun & wind will dry the surface, but the pool of water will lurk just below the surface.
I know. I have several 100 acres of farm _just_ like that.
You need to plow when it is dry, or in fall & let the cold winter weather the clods.
Adding stuff as others suggested will help long-term. Tiling will also help long-term.
For this year, dragging (harrowing) the clods shortly after a rain will break them up. You need to hit it when the outsides are dry, but the insides of the clods are still damp. Kinda touchy on needing the right rain & right timing. Doing heavy tillage at that time (like the tiller) will just create a new layer of compacted soil - you want this to be just a real light pass, to fracture the clods.
Good luck. For this year, mostly time & rainfalls will help. Maybe a good year to haul in some composte or different soil type & get it all blended together. Drainage would be great, but often too spendy to do right for a small plot, and can make bigger problems if done wrong.
--->Paul