My soil was pretty bad, with some areas more heavy clay than others. I think what helped most was getting more organic matter incorporated. I changed my routine to add it yearly, without taking the gardens out of production. I till the whole garden once. Then I use bales of peat moss, one per 50' row, and spread it in line before I make my second tiller pass just prior to planting that row. I plant that row and move over to the next one, spreading the peat and tilling, and so on through the garden. That puts a moderate mix of peat right where I plant for that year. That improves the soil structure yearly. Next... Most of my crops get mulched with last year's leaves or straw. Tomato and pepper plants are mulched immediately after planting, and seeded rows are mulched once the plants are a few inches tall. Sometimes I mulch with wood chips. That mulch keeps plants moist and roots cool, and it improves the soil structure when it's tilled in at the end of the season. Next... Early fall after clearing most old plants (to a compost pile), I spread the mulch out and till lightly. I then broadcast oats and drag or roll it into the soil. I buy regular cleaned oats sold at Rural King for horses, because it's reasonably priced and convenient. It germinates within a week and covers the garden in a low green mat before freezing off over winter. That gets tilled in when I'm ready to start planting in the spring.
I never used to mess with all this, but started about 10 years ago to improve my soil. I don't mulch or use peat on one larger area where I plant sweetcorn, just planting oats in the fall. That area improved a little over the years. My smaller gardens though, wow! It's made such a dramatic difference it's hard to describe. Even my wife has noticed the better color and feel to the garden soil. This routine is easy, helps the plants hold moisture, and reduces weeds too.
I never used to mess with all this, but started about 10 years ago to improve my soil. I don't mulch or use peat on one larger area where I plant sweetcorn, just planting oats in the fall. That area improved a little over the years. My smaller gardens though, wow! It's made such a dramatic difference it's hard to describe. Even my wife has noticed the better color and feel to the garden soil. This routine is easy, helps the plants hold moisture, and reduces weeds too.