• Chosa, James A.
  Ford Forestry Center, Michigan Technological University, L'Anse, Michigan
  

Although the overall growth response of trees to fertilization is fairly well documented, its effects on specific gravity are not yet fully understood. A study of sugar maple on four sites on three different soil series after fertilization has shown that specific gravity tends to increase after treatment. This change was significant at the 10% level on two of the sites, while the other two sites exhibited slight increases. The percentage increase in specific gravity ranged from 0.32% to 2.85%. Diameter response for the selected study trees ranged from 20% to 57%.