Correlation studies in teak for stem volume production

The present investigation was carried out at the Department of Forestry, PGI, Dr Panjabrao Deshmukh Krishi Vidyapeeth Akola, Maharashtra and the observations were taken from National Teak Germplasm Bank, Lohara, Chandrapur, Maharashtra. It was conducted on thirty clones of teak (Tectona grandis L) using randomized block design with three replications. The teak plantation was established in the year 1979 at the spacing of 8 x 8 m. One plant per treatment was selected randomly to record observations for six characters. Plant height showed positive and significant correlation with girth (r= 0.823) and volume (r= 0.823). It showed positive and non-significant correlation with girth (r= 0.326), leaf area (r= 0.105) and dry weight of leaf (r= 0.141). However it showed positive but significant correlation with volume (r= 0.500); girth showed positive and significant correlation with dry weight of leaf (r= 0.389); leaf area showed a positive and significant correlation with dry weight of leaf (r= 0.879) and number of branches (r= 0.822) and negative and non-significant correlation with volume (r= 0.196) at genotypic level. It showed a positive and significant correlation with dry weight of leaf (r= 0.879) and number of branches (r= 0.822); dry weight of leaf showed a positive and significant correlation with number of branches (r= 0.701) and positive and significant correlation with number of branches (r= 0.637) and non-significant correlation with volume (r= 0.199) at phenotypic level. Number of branches showed a positive and significant correlation with volume (r= 0.445) at genotypic and a positive and significant correlation with volume (r= 0.140) at phenotypic level.