Hi again

We've taken over an allotment in poor state.

Soil is heavy with a bit of clay from my inexpert asessment

Dug over our beds about 6 weeks ago.

We have a supply of rotted horse manure.

Can we add some of this to the soil for this years crops or is it too
late this year?

And any ideas on quantities?

Finally are there any other tips on getting newly dug soil into
reasonable condition for this year?

TIA again

Nicholas