College of Agriculture & Natural Resources Department of Forestry

Research Interests

Biological and economic aspects of Christmas tree production; Christmas tree marketing and market trends; evaluation of alternative species especially Abies sp. for Christmas tree production.

Programs and Grants

• Evaluation of true firs (Abies sp.) for Christmas tree production
• Soil fertility management for Fraser fir
• Environmental implications of Christmas tree production.

Outlying Property Manager

• Upper Peninsula Tree Improvement Center (UPTIC)
• WK Kellogg Forest
• Fred Russ Forest
• Jim Wells Forest
• Dunbar Experimental Forest
• Tree Research Center (TRC)
• Latest GIS Layouts for Outlying Properties

Selected Publications

Koelling, M. R., 1991. "Environmental Concerns and Christmas Tree Producers. Michigan Christmas Tree Journal 33(2):11, 17, 18, and 48.

Koelling, M. R., 1992. "A Ten-Year Michigan Christmas Tree Grower Survey." American Christmas Tree Journal 36(3):19-25.

Koelling, M. R., 1998. "Christmas Trees Do Not Cause Fires - Some Facts!", American Christmas Tree Journal, 42(4):4-21.

Koelling, M. R., 2001. "Fertilization Recommendations For Fraser Fir - Part I: Before Planting", Michigan Christmas Tree Journal 48(4):5-9.

Koelling, M. R., 2002. "Fertilization Recommendations For Fraser Fir - Part II: Established Plantings", Michigan Christmas Tree Journal, 49 (1): 5-8.