[JayG]

It's an interesting list Mum!

I used to be even "sadder" than I am now and several years ago weighed all the runner beans from what must have been about a 12' row. Answer; 65lbs excluding the ones which were picked too late to be edible. It was a double row though!

Interesting to see that the mangetout were twice as productive as the shelling peas (wonder if that was the shelled weight?)

The way my spring onions are so far I think I'll refrain from commenting about the salad onion entry! 

[mumofstig]

I am giving up with the spring sown salad onions outside, as  they are just hopeless!
I had more success with the winter hardy ones sown in the greenhouse in late autumn, at least they don't let me down. Will see how they stand in the summer, next year it may be better to sow in a box and then move outside when the weather improves.

[oldcow]

This blog has info about average yield per 100 square feet for several crops, on intensively planted beds; the blogger is in Washington State, where weather is pretty similar to the UK weather.
http://www.modernvictorygarden.com/averagecropyieldsdata.htm