This study was undertaken to summarize and supplement existing knowledge of the factors which stimulate or retard the secretion of nectar. The work was carried out under the direction of the botany section of the Iowa Agricultural State Experiment Station in cooperation with the chemistry section, being done mostly at Ames, Iowa, from June, 1914, to June, 1916.
Kenoyer, Leslie Alva
"Environmental influences on nectar secretion,"
Research Bulletin (Iowa Agriculture and Home Economics Experiment Station): Vol. 3
, Article 1.
Available at: https://lib.dr.iastate.edu/researchbulletin/vol3/iss37/1