1. A field study of asparagus growth;Blumenfield,1961
2. Effects of fertilizer practices, cover crops and ridge culture on asparagus;Brasher;Del. Agric. Exp. St. Bull.,1954
3. Growth characteristics of asparagus in relation to yields from mechanized harvesting;Downes;Mich. Agric. Exp. St. Q. Bull.,1961
4. Mechanical harvesting for green asparagus;Kepner;Cal. Agric.,1969
5. Some observations on root and crown bud formation in Asparagus officinalis;Tiedjens,1926