Nel-Rep plots: Spruce and alder heights and diameters 1990-1997

This experiment considers the growth of white spruce and green alder under a variety of densities. The plantation lay-out is a combination of Nelder plots and a classical replacement series. Densities within individual plots range over four orders of magnitude, and the experiment as a whole includes plots with five different species ratios (100:0, 75:25, 50:50, 25:75, 0:100). The spruce were planted in 1990 and the alders planted in 1991. Dead seedlings were replaced during the first five years of the study. This text file includes height and diameter measurements of spruce and alder from 1990 to 2002 (some years absent), and other measurements such as dead number for each year. Units of measurement for height and diameter are 'CM' and 'mm', respectively. 'SPMIX' means different percentage of spruce and alder in each block.