. Yearbook of agriculture . oS=sJt55i ;g22 J.°^|| Pig. 102.—Improyed land is a better criterion of the real size of a farm than itstotal area. The Cotton Belt stands out clearly, with the farms in most of the areaaveraging less than 40 acres. The same small acreage per farm is found in easternNfw England, where trucking and dairying dominate, and in the upper Lakes area,where farms are only partially reclaimed from the forest. At the other extreme, muchof the Great Plains ajid most of the Spring Wheat Area average over 200 acres per sharp gradation zone extending from northwestern Min


. Yearbook of agriculture . oS=sJt55i ;g22 J.°^|| Pig. 102.—Improyed land is a better criterion of the real size of a farm than itstotal area. The Cotton Belt stands out clearly, with the farms in most of the areaaveraging less than 40 acres. The same small acreage per farm is found in easternNfw England, where trucking and dairying dominate, and in the upper Lakes area,where farms are only partially reclaimed from the forest. At the other extreme, muchof the Great Plains ajid most of the Spring Wheat Area average over 200 acres per sharp gradation zone extending from northwestern Minnesota to Indiana, thenceto central Texas, marks the eastern margin of the prairies (see Fig. 7). Prairie farmswere more easily and quickly made than forest farms, and have remained larger. (SeeFig. 111.) 99912°—YBK 1921 32 492 Yearhooh of the Department of AgncuUure^ Fig. 103.—The Corn Belt is conspicuous on this map, average land values in centralIllinois anil northwestern Iowa having risen to over $l!r>0 an acre in 1919. There hasbeen a decline since. The irrigated areas are also shown on the map as having landvalues of over .$, but this is not true of all the districts. Even the larger irrigatedareas were too small to show other than in black, and many smaller districts could notbe shown at all. The regions of low land values are the arid and semiarid lands ofthe West, the sandv, thin, or stonv soils of the upper Lakes area and the North AtlanticStates, and the light or leached lands in parts of the South, where also much of thefarm may be in forest. The first box in the legend should read $0-$10, the second box$ll-$25. A Graphic Smnmary of American Agnculture. 493


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Keywords: ., bookcentury1800, bookdecade1890, booksubjectagriculture, bookyear