View Proceedings 2020-2029 2021 41st Biennial Virtual Meeting 2010-2019 2019 40th Biennial Meeting 2017 39th Biennial Meeting 2015 38th Biennial Meeting 2013 37th Biennial Meeting 2011 36th Biennial Meeting 2000-2009 2009 35th Biennial Meeting 2007 34th Biennial Meeting 2005 33rd Biennial Meeting 2003 32rd Biennial Meeting 2001 31st Biennial Meeting 1990-1999 1999 30th Biennial Meeting 1997 29th Biennial Meeting 1995 28th Biennial Meeting 1993 27th Biennial Meeting 1991 26th Biennial Meeting 1950-1959 1954 8th Biennial Meeting 1952 7th Biennial Meeting 1950 6th Biennial Meeting 1940-1949 1948 5th Biennial Meeting 1946 4th Biennial Meeting 1942 3rd Biennial Meeting 1940 2nd Biennial Meeting 1930-1939 1938 1st Biennial Meeting Proceedings Search Search for: Note: To search entire phrases, use double-quotesExample: "sugar beet" proceeding 1952 7th Biennial Meeting View Proceeding proceeding 2021 41st Biennial Virtual Meeting View Proceeding proceeding 2019 40th Biennial Meeting View Proceeding proceeding 2015 38th Biennial Meeting View Proceeding proceeding 2013 37th Biennial Meeting View Proceeding proceeding 2011 36th Biennial Meeting View Proceeding proceeding 1954 8th Biennial Meeting View Proceeding proceeding 1950 6th Biennial Meeting View Proceeding proceeding 1940 2nd Biennial Meeting View Proceeding proceeding 1942 3rd Biennial Meeting View Proceeding proceeding 1946 4th Biennial Meeting View Proceeding proceeding 1948 5th Biennial Meeting View Proceeding Posts navigation 1 2 Next »