Use of Logarithmic Regression in the Estimation of Plant Biomassl

Received August 24, 1971 photography or (t) ~ of photography; ation of a base mar tsaic or large-scal~. tead; ing as it is not ea. lume. Alternatively. made less intensivo 'oader types. planner should be area and level or inventory is les~ .ones. This is truc : size varies little sampled. For ex~ present inventory 1 been 20 times a~ would only hav" BASKERVILLE, G. L. 1972. Use of logarithmic regression in the estimation of plant biomass. Can. J. Forest Res. 2, 49-53. The basic assumptions of regression analysis are recalled with special reference to the use of a logarithmic transformation. The limitations imposed on inference-making by failure to comply with these assumptions are discussed and ways to avoid the limitations indicated. A systematic bias of the order of 10 to 20% which is inherent in most, if not all, prior uses of the logarithmic equation to estimate plant biomass is noted as is the correction for the bias.