<prompt> Pedzisa mutsara unotevera: Hansen aiva nhengo yeInternational Jury of Horticulture pa  <response>: Worlds Fair muSt. Louis, Missouri muna 1904 uye nhume yeUnited States kuFirst International Congress of Genetics muLondon, England muna 1906. Akashanda somunyori weSouth Dakota Horticultural Society kwemakore akawanda. Muna 1949, chivako chokuyeuka Dr. Hansen nemipiro yake chakamiswa pakoreji yeSouth Dakota State College. 