Stocking percent and seedlings per acre in naturally established longleaf pine [Pinus palustris]

A relationship between milacre stocking and number of longleaf pine seedlings (Pinus palustris Mill.) per acre was derived from observations of 128 populations naturally established under a wide range of site conditions. The nonlinear regression obtained from the data was Y = 100 [1-(0.561)X], in which Y is the percentage of milacres stocked and X the average number of seedlings per milacre plot (seedlings per acre in thousands). This regression accounted for 85 percent of the observed variation in milacre stocking. The coefficient decreased when sample plot size was reduced to 0.5 and 0.25 milacre.