How to seed rows in lumpy alpaca manure? Problem solved.

You know I am in love with alpaca manure. It is spread thickly all over the gardens. I am going to stir it in a bit but not really deeply. This is going to leave a very lumpy surface. How do you make a trough 1/4 inch deep to seed. It's lumps. I spotted the raincheck I had for 12 bags of organic compost on the fridge....TA DA!! Problem solved. We went and picked up the compost. I am going to put a layer over each bed in which to seed.