I use it as a soil improver for the vegetable gardens,
iona. Since not using manure, I have had a really difficult time maintaining soil fertility as my allotment is basically stony sand. Great for the sorts of semi-wild flowers I love but hopeless for high nutrient demands of potatoes, beans and so on. My raised beds more or less consist of the once used soil from the weed-growing, (John Innes 3) with whatever additional humus I can add. Compost is a nice structural addition but does bugger all for nutrients whereas biochar and to a lesser extent, stuff like the zeolite, seems to maintain fertility across several seasons. So, especially for my main crops (tomatoes and potatoes), I dump a top-dressing of once used loam, compost, terra preta and spent mushroom compost (I get from a friend who does actually raise mushrooms on a barley straw substrate) on top of the beds across the whole growing season. I could use spent hops too but I think rats are a bit keen. I don't dig these beds but plant the potatoes quite shallowly with a bulb-planter then increase the depth over the whole season. I can get through a couple of tonnes of compost, as well as additions, just maintaining a deep enough covering to avoid greening. It is all very bouncy, fluffy and friable though.-weeds just slip out with a poke of the hori-hori. (even mallow).
I am not very scientific about any of this, simply making use of whatever comes my way and keeping my fingers crossed...and because I am only using a 2 year rotation (because space), I try to keep adding as much fresh soil every year. I used to use chicken manure pellets and that 6X stuff but really couldn't be doing with the whiffiness of it all. I do have to use additional granular ferts around heavy feeders like blackcurrants. (and dahlias).
I don't love growing vegetables and am losing the fruit battle most years, (because I hate to use nets) so I only have around a quarter of an allotment for annual veggies - the rest being permanent stuff like trees, roses, the remaining fruit bushes and, of course, flowers.
Oh yeah, in spring,I also scrape off the top coupla inches of most of the containers in my home garden, and top them up with more of the JI3 and biochar (or whatever)...and add a bit in when I do the yearly auricula repotting. I think it keeps the pots from becoming compacyted and sour. It looks a lot like the old, unimproved black carr soil of the fens and, I think, actually cured a largish patch of verticillium which plagued one area of my plot. I have monster tree paeonies growing there now.
Lucky you - having reliable sources of useful stuff is a complete bonus.