I never put grass clippings in the garden because the clippings rob the N from the soil and they stink too. When my wife raised draft horses, I used to use the manure in the garden and then spent the entire growing season pulling weeds. Don't do that anymore. I'll first till it and then broadcast 28 granulated urea and then till it again, let it sit for a week and plant it. This year I'm planting roundup ready sweet corn so any weeds that come up, the roundup will handle. Cou8ple weeks and I'll be spraying my hayfields with DEF. I buy it on sale when expired for cheap and spray it on my alfalfa fields. Just bought a full 350 gallon IBC tote of expired DEf for 100 bucks. Better than pouring it down the drain. DEF as a foliar inoculant really makes alfalfa grow. I cut it down to about 20% with water btw. Still smells like cat pee anyway.
Been doing that ever since DEF came on the scene. No point in spending 50 bucks plus per sack of 28 granulated when I can get expired DEF for just about nothing. I'm cheap.
I do put 28 granulated on the garden however. The timed release clay coated prils work real well for vegetables.
I'll admit I've tilled to wet in the past as well but don't take long for the tiller tines to get 'wadded up' and me putting it in the barn for another day.