Using a garden tiller to till manure into the garden is a labor of love. It would be easier to pick up a bag of 13-13-13 fertilizer and spread it into the garden, than it is to shovel, spread, and then till.
In a way, tilling manure into a garden makes a full circle. The feed the animals ate came from the ground, so why not return it to the ground.
April 12, 2018 I tilled three wheelbarrow loads of chicken manure into the spring garden. Some of the seeds I put down in March did not take, so I redid the rows with manure, and planted fresh seed.
I also tilled chicken manure into the garden along the peppers and tomatoes, then raked the soil up around the plants. We are expecting terrible storms in the next 48 hours. So I worked the soil up around the plants to protect them from being damaged by the wind and rain.