As we learned during our shoot, John is farming basically as it was done 100 years ago.  This refers primarily to multi- crop farming, employing methods of simple crop rotation, and growing both food and animals without the use of herbicides, pesticides, growth hormones or genetically modified feed.  We even learned that some degree of weed cover in the cornfield, contrary to being huge concern, can actually keep the soil more moist so it can naturally better withstand periods of drought.