Hi there Seafoosandeatit. Welcome to the forum. I moved your post here as you may get more replies to your questions
I can give you a couple of answers
- You can add lime now, but not at the same time as manure because it will give an unwanted chemical reaction. Lime suits brassicas. I usually leave it a week or two after liming to plant cabbages etc, and tbh they don't really need manure any way. A few chicken manure pellets in the hole at planting time is enough for them to get through the season
- Crop rotation is done to ensure diseases are not carried forward from one season to the next, and the soil does not get depleted by growing the same family of veggies year on year. So to follow your brassicas you could sow root veggies or plant onion sets, then manure when you harvest these.
I hope that helps a bit