double duty for a straw bale bed

The tomatoes I planted in 4 straw bales ( topped with a 1/2" layer of compost) did fantastic. They are of course long gone. by the end of the season the foot high straw bales are reduced to about 6". That I expected. What I did not expect was poking around in that leftover stuff, pulling the old bale windings out, there is 6" of the most fabulous loam you ever saw! Beautiful black, fluffy, light, perfectly composted. So I used it to plant two new fruit trees - Hudsons golden gem apple and a Comice pear, and two berry bushes - blackberry and raspberry. Plus that spot where the bales were still has a huge layer of fluff to plant something else in. Not sure what though, will have to give it some thought.