From the "Healthy Farmers, Healthy Profits" project, a series of really useful low-tech tools and tips. I got several great ideas from this page for veggie growers, and there are also pages of tips for nursery growers, berry growers and dairies.

http://www.bse.wisc.edu/hfhp/TipVeggie.htm

Here is a link that might be useful: Veggie grower tips