Materials and Methods Two new accessions were added in 1999. Newly planted items were hand watered after planting to aid in establishment. Data collected included percent survival, mean growth measured as height increase and plant vigor. Five-year mean stem diameter and mean crown diameter measurements were collected from the eight accessions in the 1995 plot. Results and Discussion Adequate moisture for successful plant establishment and sustained growth of plantings continues to be a concern at this site.
Recommendations regarding the implementation of such practices continue to be offered.
A synopsis of plant performance of accessions planted from 1987 to 1994 are presented as part of the 1998 report in this publication. 1998 is absent since no additional plantings were made in that year. No bronze birch borer problems have occurred to date. Dakota Pinnacle , a recent NDSU introduction, produces trees with quality foliage and a distinct narrow columnar growth habit. Two NDSU clonal accessions of Honey-locust had survival rates significantly greater than Imperial , the comparison cultivar.