Source of variation

Degree of freedom

Plant height (cm)

Stem girth (mm)

Number of leaves

Leaf area

(cm²)

Leaf chlorophyll content (SPAD)

Leaf area index (LAI)

Days to 50% tasselling

Days to 50% silking

Replication

3

796.9

44.92

0.692

3064

34.64

0.4081

2.067

1.500

Treatment

4

8466.4***

128.90*

28.662***

99,074***

1241.03***

15.1827***

28.400***

33.538***

Year

1

547.0NS

175.26*

9.025***

78,938***

898.70***

17.5673***

22.500*

62.500***

Treatment × Year

4

811.5NS

105.47*

2.352*

5032NS

111.92***

0.9417NS

23.875**

24.188**

Residual

27

398.4

35.70

0.691

2710

14.56

0.3611

4.363

4.296