In uk.rec.gardening honeyman wrote:
I have taken on a plot of land 12meters square and intend planting it
as a small fruit orchard, with apples, pears, plums, cherries and
gooseberries as a surrounding hedging (keeps the 2 legged rats at bay
;-). What trained forms, cordons, espalliers, or bushes should yield
the heaviest harvests from this site?

Heaviest yields would be from sutiable varieties grown as bushes - but
they take the most space up. Cordons take the least space and hence you
can get more varieties. Espaliers are inbetween. However espaliers and
cordons are labour intensive.