Posted: 01/01/2016 at 17:16
Wood ash can be added to the compost heap or spread on the earth and raked or lightly dug in. It can be a natural source of potassium and trace elements, but it's alkali so don't use for acid loving plants. Good for brassicas, helps prevent club root.
The roots of peas and beans have little white nodules on them which contain nitrogen, but it doesn't last forever. I dig them in though.
I would put the manure in a pile and leave it to rot. When it is dark and crumbly then it is a good fertiliser and soil conditioner.
Potatoes shouldn't be planted in the same place because of the risk of blight and diseases.
Lupins are hardy, but baby ones would be best in the cold greenhouse over winter, which would also protect them from slugs and snails.
I would look up nitrogen etc on Google, bit techie for me!