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A study to examine the effects of a combination of wood ash and secondary papermill sludge applied to a clearcut planted to black spruce was initiated in 1987 with the cooperation of Great Northern Paper. Objectives of the study were to assess the effects of the residuals on (1) seedling growth, (2) seedling foliar element concentrations, and (3) chemical properties of the forest floor and mineral soil. This report emphasizes growth results for 1991 through 1995 and foliar element results through 1994.
Maine Agricultural and Forest Experiment Station
Shepard, R.K. 1997. Response of young black spruce (Picea mariana (Mill.) B.S.P.) to a mixture of wood ash and secondary papermill sludge. Maine Agricultural and Forest Experiment Station Miscellaneous Report 405.