Data product containing 22-year Nebraska tree heights, survival, and genetic variation for "Ten-Year Performance of Ponderosa Pine Provenances in the Great Plains of North America"

Seeds from 79 natural stands throughout the ponderosa pine range, both east and west of the Continental Divide, were sown and grown in a nursery for three to four years in the 1960's. Some of these seeds were then distributed to three different field plantations in Alliance, Hastings, and Plattsmouth Nebraska. These datasets contain individual tree heights of surviving trees, taken at various frequencies from 1968 to 1987. A very small percentage of trees at the Plattsmouth plantation were also measured in 1989 (19-year tree heights).
The study began in 1968 to determine the best seed provenances of ponderosa pine for use in protection plantings in the Great Plains of the United States. The objectives of the original study were to: 1) identifiy origins of superior performing seed sources; 2) determine the consistency of their performance across the range of plantations, and within regional groupings of plantations; and 3) determine how many years of data are necessary to detect reliable patterns in height growth.
Original metadata date was 10/12/2006. Metadata modified on 10/05/2012 to adjust citation to include the addition of a DOI (digital object identifier). Minor metadata updates on 02/28/2013, 10/27/2014, and 12/01/2016.