Drought Conditions for Burning Raw Humus on Clear-Cut Jack Pine Sites in Central Ontario

Abstract

Raw-humus materials were burned to improve seedbeds on clear-cut jack pine sites in central Ontario. The depths of residual raw humus after burning showed consistent patterns of variation both with the depths of original raw humus before burning (direct relationships) and with the drought conditions under which the materials were burned (inverse relationships). On this basis, humus-depth-reduction curves were developed for predicting the outcome of burning over a range in drought conditions.