Outdoor tomatoes, if taken care of and watered properly can yield 10 lb each. Green beans 100-150bu/acre. Sweet corn 10,000 ears/acre. Good squash and cucumbers will yield a lot but you have to keep them picked. One large cucumber left on a plant will cause it to shut down and die. Same with zuccini and really peppers too. I think the charts are accurate at a very high management level. Drip irrigation, proper weed control, and fungicides will give you these. You can probably cut those figures 1/2 or 1/3 if you didn't use pesticides and fungicides and it didn't rain much.

ALWAYS PLANT TWICE AS MUCH AS YOU THINK YOU'LL NEED.
A mennonite farmer told me that when I started my vegetable growing business. He has been absolutely right every year. Murphy's Law seems to prove it's self quite often when gardening!

Thanks king. Last year was a bad year for warm weather crops, and while I planted about 30% more than the previous year, my yields were much less. Hopefully, we will have a better growing season this year. I wish I had enough room to grow twice what I need!!!!!

This information is in the Johnny's Selected Seeds catalog

Here is a link that might be useful: Johnny's Selected Seeds

There are some very useful charts in a book called: How to Grow More Vegetables and Fruits (and Fruits, Nuts, Berries, Grains, and Other Crops) Than You Ever Thought Possible on Less Land Than You Can Imagine (Paperback) by John Jeavons. It's all about biointensive gardening and increasing food crop yields per square foot. Check your library or you can order it online. My copy is about 10 years old and I'd be curious to know if the yield estimates have changed much in the newest edition.

Here is a link that might be useful: You to Grow More Vegetables

Thanks Steve!