Watt, R.F., (1961), "Artificially Extended Photoperiod Increases Size of Nursery Stock", Minnesota Forestry Notes 104, School of Forestry, University of Minnesota
Minnesota Forestry Notes
Published as Scientific Journal Paper Series No. 4585 of the Minnesota Agricultural Experiment Station.
Watt, Richard F..
Artificially Extended Photoperiod Increases Size of Nursery Stock.
St. Paul, Minn. : School of Forestry, University of Minnesota.
Retrieved from the University of Minnesota Digital Conservancy,
Content distributed via the University of Minnesota's Digital Conservancy may be subject to additional license and use restrictions applied by the depositor.