The May issue on No-Till Farmer offered a look at the basic characteristics of adjuvants to help you make more informed purchase decisions. Another good source is the pocket-sized 8th Edition of the Compendium of Herbicide Adjuvants, released in January by Bryan Young, a weed scientist at Southern Illinois University.It is available for $3.Visit www.siu.edu for an order form.

There are at least 10 ways adjuvants can make your post-emergence herbicide work harder — and literally hundreds of adjuvant products to choose from. Here’s a look at what’s causing this proliferation and how you can be sure you’re treating your crops right.