More details of crop rotation on a future post - but basically this year the top beds on my plot were planted with potatoes - now the beds rotate on to beans for the next year. Having the same crop on the same bed year after year (with some exceptions) can increase the risk of pests and plant diseases - and this certainly applies to potatoes.
It can also exhaust the soil - something that commercial growers overcome by adding lots of artificial fertiliser - but I'm trying to grow organically - as far as is practically possible.
These beds were manured in early spring - but as spuds are a notoriously hungry crop and use up a lot of nutrients - its probably a good idea to replenish. Also beans love growing on rotting or rotted organic matter. Some crops - such as onions or carrots don't - so the planned beds for those will be left alone for now.
All now ready for planting - in this case I've put in Autumn sown Broad Beans - more on their progress soon.