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Table 2 Selected model testing the effects of pruning intensity (1/3 and 2/3 crown length), clone (1079, 747210, 915319, and DN2), season (fall, spring, and summer), and year (2010, 2011_new, and 2011_old) on the number of epicormic shoots (NUMB model)

From: Production and role of epicormic shoots in pruned hybrid poplar: effects of clone, pruning season and intensity

Tested factors

Estimate value

Standard error

DF

P value

(Intercept)

2.59

0.33

188

<0.001

Intensity 2/3

0.60

0.13

188

<0.001

Season spring

−0.65

0.45

188

0.15

Season summer

−2.14

0.38

188

<0.001

Clone747210

−0.33

0.36

6

0.40

Clone915319

0.23

0.36

6

0.54

CloneDN2

−0.22

0.36

6

0.56

year2011_new

−0.97

0.28

188

<0.001

year2011_old

−0.40

0.28

188

0.16

Seasonspring:year2011_new

0.35

0.41

188

0.40

Seasonsummer:year2011_new

1.29

0.39

188

<0.001

Seasonspring:year2011_old

0.32

0.41

188

0.44

Seasonsummer:year2011_old

0.85

0.39

188

0.03

Seasonspring:Clone747210

0.33

0.51

188

0.52

Seasonsummer:Clone747210

0.77

0.44

188

0.09

Seasonspring:Clone915319

0.30

0.51

188

0.55

Seasonsummer:Clone915319

0.85

0.44

188

0.06

Seasonspring:CloneDN2

1.07

0.52

188

0.04

Seasonsummer:CloneDN2

1.58

0.44

188

<0.001

  1. Statistically significant values (P < 0.05) are given in bold. The factor year 2010 corresponds to epicormic branches produced in 2010, 2011_new corresponds to epicormic branches produced in 2011, and 2011_old corresponds to epicormic branches produced in 2010 and 2011 and collected at the end of 2011 growing season
  2. DF degrees of freedom