About USDA Production Acreage Estimates:
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      Production acreage estimates for wheat cultivars were compiled and 
      published by the USDA at five-year intervals from 1919 to 1984 (82, 
      155, 161, 162, 170, 627, 628, 630, 631, 655, 707).  Estimates are
      presented in a tabular form for cultivars reported in the USDA
      surveys.  No table is presented for cultivars not covered by these
      USDA reports.  The publishing of these statistics on a national basis
      was discontinued by the USDA with the 1984 report.