On-site soil and plant tissue quick tests are an inexpensive way to monitor nitrate nitrogen levels. Join Steven A. Tjosvold of the University of California Cooperative Extension Service.

Scheduling frequent tissue, water, and soil tests are your keys to success. Join Hannah Mathers from Ohio State University.

Research could lead to environmentally safer and more efficient methods. Join David Sandrock of Oregon State University.

These pointers can reduce costs and improve crops. Join Tom Yeager of the University of Florida.

Tips and information to pass along to shoppers. Join Jim Chatfield from Ohio State University.

To help you make those tricky calculations and conversions, enlist the aid of the Green Beam's list of calculators.