Roy -
If possible, could you add some additional quantities for harvesting. Adding terms like "peck" and "bushel" would be extremely helpful as it is not uncommon to pick a peck of tomatoes a day in the peak of the season. Also, I harvested all my potatoes at one time and got over a bushel, so it would be nice to be able to denote that as well. It might also be useful to add the term "head" for items like lettuce, cabbage and cauliflower, etc. One more quantity which could also be useful would be to add "bulb" - specifically for garlic.
Thanks

Looking at it a bushel and a peck make sense. Both are units of measure that people can use.
Although I have to admit that I had to look up what the conversion for both was.

I will leave it up to the user as to what a bush is since the unit of measure changes depending on local laws and even what is harvested.

As for as head and bulb, these are singular units which you can use "item".
This is what I use for garlic, lettuce, broccoli (I don't normally count side shoots.

Let me know if that helps. I will put bushel and pecks into version 2.0 which we are back working on after redesigning the site and adding blogs in.