Influence of Soil Nutrients, Tree Age, and Sandalwood Provenances on Sandalwood Oil Yield and Quality
Table 3
Influence of soil nutrients on oil yield presented as the correlation coefficient R and the coefficient of determination resulting from Pearson correlations.
Parameters
R
r 2
value
Significance
%Nitrogen
0.20
0.041
0.19
n.s.
Phosphorus
0.086
0.007
0.58
n.s.
Potassium
0.046
0.002
0.77
n.s.
pH
0.11
0.012
0.48
n.s.
EC
0.052
0.003
0.74
n.s.
%Carbon
−0.012
0015
0.43
n.s.
Calcium
−0.035
0.001
0.82
n.s.
Magnesium
−0.015
0.0002
0.92
n.s.
Manganese
0.032
0.001
0.84
n.s.
Zinc
0.081
0.007
0.61
n.s.
Iron
−0.29
0.008
0.06
n.s.
Copper
0.06
0.004
0.70
n.s.
Note. Significance codes: 0 “,” 0.001 “,” 0.01 “,” 0.05 “.,” and n.s. not significant.
