Applying the ratio method, we will take as our base the ten-year period from 1897 to 1906. During this period Iowa land averaged about $50 an acre; harvest labor, without board, $2 a day; corn, 29.4 cents a bushel; hay, $5.47 a ton; oats, 23 cents a bushel; Dun’s metals, about $14, and Dun’s miscellaneous, about $15. The average acre of Iowa corn during this ten-year period was worth on a December 1st farm basis $10. Now, in 1919, Iowa land was worth about $192 an acre, or 384 per cent of the basic ten-year period; man labor, without board, at harvest time was around $5.20 a day, or approximately 260 per cent of this ten-year basic period. In like manner, corn was 410 per cent; oats, 280 per cent; hay, 330 per cent; Dun’s metals, 230 per cent, and Dun’s miscellaneous, 230 per cent. If land is allowed a weighting of 35 per cent; man labor, 20 per cent; corn, 15 per cent; hay, 10 per cent; oats, 5 per cent; Dun’s metals, 10 per cent, and Dun’s miscellaneous, 5 per cent, we arrive at 329 per cent as the cost of producing an acre of corn in 1919, as compared with 100 per cent for the basic ten-year period. In the basic ten-year period, an acre of corn actually sold for $10. In 1919, in order to come as near breaking even as in the basic ten-year period, an acre of corn should sell for $32.90. The ratio method gives almost identically the same results as the farm management method. Both indicate that it cost the average Iowa farmer in 1919 about 80 cents to produce a bushel of corn on a basis of December 1st farm values.[4] The ratio method may be applied to other crops by using a somewhat different weighting of the production factors. In the case of oats in Iowa, for instance, land may be given a weighting of about 35 per cent; man labor, 15 per cent; corn, 10 per cent; hay, 10 per cent; oats, 15 per cent; Dun’s metals, 10 per cent, and Dun’s miscellaneous, 5 per cent. This would indicate that oats in Iowa in 1919 cost about 324 per cent as much as in the basic ten years. In the basic ten-year period, the average acre of oats in Iowa sold for $8. We may therefore conclude that the cost of producing oats in 1919 was 324 per cent of $8, or $25.92. With an average yield of thirty-three bushels per acre, the cost per bushel was about 78 cents on a December 1st farm basis.