To identify sources of ponderosa pine which are best adapted to the climate of eastern South Dakota, a study having 73 seed sources or provenances was established in 1968. The study was set up as a part of a north central regional project, and the trees were planted at the Big Sioux conifer Nursery at Watertown, South Dakota. Data on survival and height after the fifth and tenth growing seasons were collected. A severe storm in early November 1977 provided an excellent opportunity to evaluate the sources for susceptibility to winter injury. Information on an attack in 1975 by Petrova metallica, pitch twig moth, was also recorded.
South Dakota State University
Baer, Norman W. and Collins, Paul E., "Ten-Year Performance of a Ponderosa Pine Provenance Study in Eastern South Dakota" (1979). Agricultural Experiment Station Technical Bulletins (1939-2011). 57.