Table 5 Analysis of variance (ANOVA) for SPAD readings (15 to 85 days after sowing at 7-day intervals) affected by precision nitrogen management practices and growing conditions.

From: SPAD dynamics in maize crop with precision nitrogen management under rain-fed and irrigated conditions

 

Mean sum of squares

Yield (kg ha− 1)

ANOVA

15شDAS

22شDAS

29شDAS

36شDAS

43شDAS

50شDAS

57شDAS

64شDAS

71شDAS

78شDAS

85شDAS

Stage of the crop

V3 stage

V5 stage

V7 stage

V8 stage

V10 stage

V12شstage

VTشstage

R1شstage

R2شstage

R3شstage

R4شstage

Replication

4.17

0.39

3.68

1.88

1.60

3.87

3.11

0.27

0.01

15.38

2.47

21484.9

Factor A (growing conditions)

31.46*

26.17 NS

1.01 NS

15.12 NS

32.15*

6.38 NS

17.19*

14.25 NS

70.73*

153.81*

61.95*

14131918.4*

Error (A)

1.41

2.29

0.91

1.96

0.67

0.47

0.89

2.90

1.36

7.50

0.52

1477.4

Factor B (precision nitrogen management practices)

54.25*

68.74*

143.14*

129.92*

179.63*

188.34*

444.20*

432.04*

527.07*

417.54*

404.59*

31642917.1*

Error (B)

1.25

1.71

1.35

0.83

1.26

0.55

1.09

1.62

1.63

3.84

2.08

105944.5

Interaction (factor A*B)

5.10*

4.20

7.93*

2.43*

8.62*

8.35*

4.39

2.65

3.21*

9.46*

4.33

2905132.0*

Interaction (c)

1.04

1.96

1.93

0.42

0.61

1.19

2.01

2.48

0.58

0.92

1.70

87914.1

  1. *Significant at 0.01 level of probability.
  2. NSnon significant.
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