LITERATURE CITED
- Ball , T. , Folwell , R. J. and Holmes , D. 2002 . “ Establishment and annual production costs for Washington asparagus in 2001 ” . In Coop. Ext. Washington St. Univ Bul. EB1779.
- Cembali , T. 2004 . Economic of harvesting asparagus , Pullman : Ph.D. Diss., School of Economic Sciences, Washington State University .
- Cembali , T. , Folwell , R. J. , Huffaker , R. G. , McCluskey , J. J. and Wandschneider , P. R. 2006a . Economics of alternative simulated manual asparagus harvesting strategies . Agr. Sys. , 92 ( 1–3 ) : 266 – 294 . doi:10.1016/j.agsy.2006.03.009.
- Cembali , T. , Folwell , R. J. , McCluskey , J. J. , Huffaker , R. G. and Wandschneider , P. R. 2006b . Economic analysis of the inter-year effect of alternative harvesting strategies for asparagus . J. Veg. Sci. , 12 ( 29–50 ) doi: 10.1300/J484v12n01_04.
- Chapman , H. R. , Rudziejewski , R. and Arndt , G. Automated asparagus harvesting, 179–185 . Proc. 2nd International IARP Workshop on Robotics in Agriculture and the Food Industry . June 17–18 1991 , Genova, Italy.
- Davis , C. F. Asparagus cutter . U.S. Patent No. 887,466 . 1908 .
- Dean , B. B. 1999 . The effect of temperature on asparagus spear growth and correlation of heat units accumulated in the field with spear yield . Acta Hort. , 479 : 289 – 295 .
- Folwell , R. J. and Worley , T. 1995 . Economic evaluation of existing technologies to harvest whole spear asparagus. Report to the Washington Asparagus Commission . Department of Agricultural Economics, Washington State University. , : 80
- Hopper , R. J. and Folwell , R. J. 1999 . Effects of mechanized harvesting on revenues from processed asparagus . Acta Hort. , 479 : 447 – 451 .
- Kepner , R. A. Asparagus harvester . U.S. Patent No. 2,791,878 . 1957 .
- Lampert , E. P. , Johnson , D. T. , Tai , A. W. , Kilpatrick , G. , Antosiak , R. A. , Crowley , P. H. and Goodman , E. D. 1980 . A computer simulation to maximize asparagus yield . J. Am. Soc. Hort. Sci. , 105 : 37 – 42 .
- Lund , W. J. Asparagus harvester . U.S. Patent No. 4,512,145 . 1985 .
- Marshall , D. E. Status of mechanical asparagus harvesting . Proc. Winter Meeting, sponsored by the American Society of Agricultural Engineers . December 13–16 1994 , Atlanta, GA.
- Michalson , E. L. and Thomas , W. C. 1972 . Economics of asparagus production and harvest mechanization in Washington . Bull. State Coll. Wash. Agr. Exp. Stat. , 759
- Salkeld , W. J. Green asparagus harvester . U.S. Patent No. 4,918,909 . 1990 .
- Scott , L. E. , Mitchell , J. and McGinty , R. 1939 . Effects of certain treatments on the CHO reserves of asparagus crowns . Bull. State Coll. Wash. Agr. Exp. Stat. , 321 : 5 – 37 .
- Seeley , A. M. and McKibben , H. E. Asparagus snapper . U.S. Patent No. 3,893,285 . 1975 .
- Stout , B. A. , Kline , C. K. and Hoglund , C. R. 1967 . Economics of mechanical asparagus harvesting systems . Mich. State Univ. Exp. Sta. Farm Sci. Res. Rep. , : 64
- USDA . 1996 . “ United States standards for grades of fresh asparagus ” . In United States Department of Agriculture, Agricultural Marketing Service, Fruit and Vegetable Division, Government Printing Office Washington, DC
- Washington State University. 2004. Public Agricultural Weather System http://index.prosser.wsu.edu
- Wilson , D. R. , Cloughley , C. G. , Jamienson , P. D. and Sinton , S. M. 2002 . A model of asparagus growth physiology . Acta Hort. , 589 : 297 – 301 .
- Wilson , D. R. , Cloughley , C. G. and Sinton , S. M. 1999a . Model of the influence of temperature on the elongation rate of asparagus spears . Acta Hort. , 479 : 297 – 304 .
- Wilson , D. R. , Sinton , S. M. and Wright , C. E. 1999b . Influence of time of spear harvest on root system resources during the annual growth cycle of asparagus . Acta Hort. , 479 : 313 – 319 .