To know exactly how much seed the grain drill is using it is necessary to know how many acres are contained in the field. Most drills have an attachment that is supposed to measure how many acres and fractions of acres the drill covers. Farmers know how much grain each sack contains, so they can estimate as they go along, provided the drill register is correct. It is better to provide a check on the drill indicator. Have the field measured, then drive stakes along one side, indicating one acre, five acres and ten acres. When the one-acre stake is reached the operator can estimate very closely whether the drill is using more or less seed than the indicator registers. When the five-acre stake is reached another proof is available, and so on across the field. Next in importance to the proper working of the drill is straight rows. The only way to avoid gaps is to drive straight. The only way to drive straight is to sight over the wheel that follows the last drill mark. Farmers sometimes like to ride on the grain drill, which places the wheel sighting proposition out of the question. A harrow cart may be hitched behind the wheel of the grain drill, but it gives a side draft. The only way to have straight rows and thorough work is to walk behind the end of the drill. This is the proper way to use a drill, anyway, because a tooth may clog up any minute. Unless the operator is walking behind the drill he is not in position to see quickly whether every tooth is working properly or not. It is hard work to follow a drill all day long, but it pays at harvest time. It costs just as much to raise a crop of grain that only covers part of the ground, and it seems too bad to miss the highest possible percentage to save a little hard work at planting time. SPECIAL CROP MACHINERY Special crops require special implements. After they are provided, the equipment must be kept busy in order to make it pay. If a farmer produces five acres of potatoes he needs a potato cutter, a planter, a riding cultivator, a sprayer that works under high pressure, a digger and a sorter. The same outfit will answer for forty acres, which would reduce the per acre cost considerably. No farmer can afford to grow five acres of potatoes without the necessary machinery, because hand labor is out of the question for work of that kind. On the right kind of soil, and within reach of the right market, potatoes are money-makers. But they must be grown every year because the price of potatoes fluctuates more than any other farm crop. Under the right conditions potatoes grown for five years with proper care and good management are sure to make money. One year out of five will break even, two years will make a little money and the other two years will make big money. At the end of five years, with good business management, the potato machinery will be all paid for, and there will be a substantial profit. WHEEL HOE