I am fortunate to have access to cow manure for free, but have to shift it by hand, previous years I have dug aimed for about 6 cubic metres, which just about does a 10rod allotment. This year I have a choice of un rotted manure that is less than a year old but is fairly easy to access, or 3 year old that is much less easy to access and so I think I will only be able to shift about half as much.
I can take any combination and what I don’t take will be there for next year but what is best to aim for? My soil is very light and sandy and has struggled with water retention this year.