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<br />It was designated Biotype E greenbug. The new Biotype E green- <br />bug was able to feed, reproduce and damage greenbug resistant <br />sorghum varieties similar to the old susceptable counterparts." <br />In the following four full-page tables, IV-9 to IV-12 inclu- <br />sive, the 13-year record has been assembled by the five major field <br />crops which accounted for 98 percent of all harvested crops in 1980. <br />First, some analysis of the aggregates and some inter-crop compari- <br />sons and trends are noteworthy. Then, some facts are recorded <br />about each crop which may have relevance to the dryland economy <br />expected in the future. <br />In acreage terms, sorghums harvested for grain ranked on a <br />par with cotton in importance in the late 1960s and early 1970s. <br />In the four years through 1971, cotton constituted about 46 percent <br />and milo about 44 percent of harvested crops, with wheat and soy- <br />beans accounting for nearly 10 percent. Corn had not yet become <br />a well-known South Plains crop. By sharp contrast, in the last <br />four years through 1980, cotton had become the major crop with <br />about 64.2 percent of harvested acres, while grain sorghums had <br />declined to less than 16.0 percent, even out-ranked by corn. <br />During the entire period, wheat has remained an unusually stable <br />two to five percent of cropland harvested. A part of the pronounced <br />shift into cotton has been due to elimination of the government's <br />long-established acreage allotments, but there are other more com- <br />pelling reasons, as we shall see in subsequent analysis. <br /> <br />I <br />. <br />. <br />. <br />. <br />. <br />I <br />- <br /> <br />I <br />. <br />I <br />. <br />I <br />I <br />I <br />I <br />I <br />. <br />. <br /> <br />IV-44 <br /> <br />I <br /> <br />Arthur D Little, Inc. <br />