Whakakī i te rerenga e whai ake nei: Ko Hansen he mema o te Rōpū Whakataetae o te Ao o te Horticulture i te
Ko te Whakaaturanga o te Ao i St. Louis, Missouri i te tau 1904 me tetahi mema o te United States ki te First International Congress of Genetics i Ranana, Ingarangi i te tau 1906. I mahi ia hei hēkeretari mo te South Dakota Horticultural Society mo nga tau maha. I te tau 1949, i whakaarahia he tohu whakamaumahara ki a Dr. Hansen me ana takoha i te whare wananga o South Dakota State College.