This raised bed had the following succession. Last year, onions. This year, garlic, then bush beans. I planted a row of French Marigolds at the end, which grew vigorously.
Marigolds contain a substance that is toxic to some harmful herbivorous soil creatures. So, I thpughtbit might be useful to treat the soil with a marigold "green manure".
First, I cut off all of the beans and weeds.
I removed those. I thought about mixing them with the soil, but it seemed like more effort than I could handle. So the bean tops and weeds went to the compost heap. Then I roughly chopped the marigold plants, and spread them over the soil.
Then I used the shovel to turn over the soil, mixing in the marigold choppings.
This bed was the only one not to get a treatment of biochar last winter. Supposedly, biochar will help keep the soil healthy and nutritious. So I spread the remaining biochar onto the soil.
I also found a bag of chicken bone / woodstove ashes, in the garden shed. So I spread those too.
Then I used the hand tiller to roughly mix it all together.