Hi David,
Funnily enough the results are there, above the squash photo in December 2013 This Month.
Certainly one can draw no conclusions yet. It was interesting how the heat loving plants (beans, squash) struggled to establish on the undug bed with no compost, while beets and leeks were fine. I think that the beans and squash need to root rapidly in June and July but decomposing roots of pasture were slowing them down, and there was no compost to help – see the high yield of squash on bed 3.
The Shumei farm at Yatesbury ran a similar trial but it got overgrown with weeds, I think they are stopping it…
We have used the squash in soupls and bakes only!