Thinking of planting 20lbs. of wheat, 2lbs. radishes, 2lbs. turnips, probably throw in a little pearl millet I have left over. First concern is that going to stay mixed in the drill box or is one going to work to the bottom and feed out faster than the other. Second, due to the vast difference in seed sizes, which seed do you look at on the chart to get an idea of how to set the drill?