A few seasons ago, the national television series I host and produce, "Growing a Greener World," did an episode entitled, "The Dirt on Healthy Soil." In the episode, we visited a soil-testing lab, typical of such labs operated by a state agriculture department or university system. This particular lab was run by the North Carolina Department of Agriculture, in Raleigh, N.C. Once inside, the first thing to strike me was the massive backlog of soil-filled boxes sent in by home gardeners and farmers to be processed for testing. There were many giant rolling mail hampers loaded to capacity in one large room and down the long hallway. In several other rooms, stack after stack of boxes already logged and ready for processing. Suffice it to say, many thousands of samples in queue, with hundreds more arriving every day.