Broad Bean and Field Bean
Describes some aspects of botany, and describes pollination requirements in detail.
http://gears.tucson.ars.ag.gov/book/chap4/broad.html
Vicia faba
Notes on botany, cultivation, food value, and commercial production. Purdue University.
http://www.hort.purdue.edu/newcrop/duke_energy/Vicia_faba.html
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