Acres of open field burn post-harvest residue management used by Willamette Valley
grass seed growers for each species in 1992-2001.

Open burn acres
Species 19921 19932 19943 19954 19965 19976 19987 19998 20009 200110
Bluegrass 153 239 173 167 91 46 133 47 15 10
Bentgrass 5,551 3,203 3,122 2,534 2,974 2,468 1,862 1,140 1,362 1,659
Fine fescue 22,865 21,977 21,801 18,027 16,723 13,634 14,219 14,985 15,987 17,254
Orchardgrass 1,222 649 594 974 958 425 523 17 261 196
Per. ryegrass 6,855 9,061 9,247 10,390 10,115 6,523 4,929 6,584 4,766 5,501
Tall fescue 14,581 10,228 8,340 9,342 7,722 6,206 4,717 4,101 3,155 2,227
Ann. ryegrass 31,764 27,823 36,185 40,053 36,757 26,821 19,446 22,336 24,198 25,252
TOTAL 82,991 73,180 79,462 81,487 75,340 56,123 45,829 49,210 49,744 52,099

  11992 final data reported as of December 14, 1992
  21993 final data reported as of January 12, 1994
  31994 final data reported as of January 4, 1995
  41995 final data reported as of December 4, 1995
  51996 final data reported as of December 16, 1996
  61997 final data reported as of December 4, 1997
  71998 final data reported as of March 23, 1999
  81999 final data reported as of January 31, 2000
  92000 final data reported as of June 4, 2001
102001 final data reported as of February 15, 2002