Abiotic Factors Affecting Canola Establishment and Insect Pest Dynamics
Table 2
Linear and quadratic regression analysis of weight (gram) of canola plants.
Explanatory variable
Parameter
T value
P value
Intercept
126.05134
1.38
0.1697
Precipitation (mm; linear)
0.76082
2.06
0.0402
Minimum daily relative humidity (%; linear)
−0.43443
−6.56
<0.0001
Maximum daily solar radiation (KJ/m2; linear)
0.04336
6.59
<0.0001
Maximum daily solar radiation (KJ/m2; quadratic)
−1.07E−07
−5.71
<0.0001
Maximum daily wind speed (m/sec; linear)
−1.66063
−4.43
<0.0001
Maximum daily wind speed (m/sec; quadratic)
0.00036
3.45
0.0006
Maximum daily temperature (°C; quadratic)
−0.00083
−3.18
0.0016
The multiregression analysis was based on forward stepwise selection of linear and quadratic effects of 11 explanatory variables to ranked training plant weight data from two growing seasons and two field locations . The vertical sequence of explanatory variables reflects the descending order of selection (contribution to regression fit).
