Table 3 Parameters of growth equation for aboveground dry matter in cotton under different row configuration, plant density, and topping treatments in 2020 and 2021

2020

Equal row spacing

Manual topping

18

21.3±1.63 a

0.06±0.00 a

62.6±0.22 b

13.7

0.99

10

13.7±1.16 b

0.04±0.00 b

65.8±0.76 a

10.7

0.97

Chemical topping

18

22.1±1.33 a

0.05±0.01 a

63.5±0.58 a

5.90

0.97

10

15.8±1.14 b

0.05±0.01 a

63.7±1.02 a

12.4

0.98

Narrow-wide row spacing

Manual topping

25

25.4±3.35 a

0.05±0.01 a

65.1±2.17 a

12.4

0.97

15

19.3±2.73 a

0.06±0.01 a

63.7±1.39 a

10.0

0.98

Chemical topping

25

21.6±1.37 a

0.04±0.00 a

66.3±0.84 a

15.2

0.96

15

18.9±1.67 a

0.05±0.01 a

64.2±1.23 a

21.0

0.96

2021

Equal row spacing

Manual topping

18

28.2±1.25 a

0.06±0.00 a

60.6±0.17 a

10.5

0.98

10

20.4±1.17 b

0.08±0.01 a

60.2±0.54 a

9.14

0.97

Chemical topping

18

31.0±1.57 a

0.06±0.00 b

60.6±0.21 a

12.6

0.98

10

19.8±0.56 b

0.08±0.00 a

60.1±0.12 a

16.0

0.95

Narrow-wide row spacing

Manual topping

25

29.0±0.84 a

0.06±0.01 a

60.7±0.31 a

9.88

0.98

15

20.0±0.85 b

0.07±0.01 a

60.8±0.57 a

11.1

0.98

Chemical topping

25

29.4±1.72 a

0.08±0.01 a

60.9±0.82 a

5.43

0.98

15

21.1±1.90 b

0.08±0.01 a

60.1±0.27 a

17.2

0.96