. 2021 Feb 3;7(2):e06145. doi: 10.1016/j.heliyon.2021.e06145

Table 3.

Variation of mechanized parameters and tractor performances: results from Kruskal Wallis test.

PAD	Variables	Mean (SD)	χ² (df = 6)	P	Variables	Mean (SD)	χ² (df = 6)	P
PAD1	Mechanized area (ha)	79.75 (12.15)^b	89.91	<0.001	Years of use	3.25 (0.65)^ab	20.50	0.002
PAD2		114.45 (5.63)^a				4.62 (0.36)^a
PAD3		134.56 (10.04)^a				2.75 (0.45)^b
PAD4		98.97 (11.96)^b				5.05 (0.41)^a
PAD5		26.38 (11.92)^c				5.00 (0.91)^a
PAD6		26.38 (9.24)^c				4.14 (0.50)^a
PAD7		12.00 (2.90)^c				4.39 (0.57)^a
PAD1	Tillage cost (thousands of FCFA)	25.00 (0.89)^e	118.34	<0.001	Number of hours for 1ha tilled	2.88 (0.36)^ab	75.77	<0.001
PAD2		30.27 (0.14)^d				1.96 (0.07)^c
PAD3		31.08 (0.46)^d				2.19 (0.13)^c
PAD4		32.04 (0.52)^c				2.46 (0.10)^b
PAD5		36.67 (1.82)^b				3.09 (0.19)^a
PAD6		37.36 (1.53)^b				3.39 (0.20)^a
PAD7		47.67 (1.68)^a				3.53 (0.23)^a
PAD1	Power of tractor (HP)	57.5 (1.89)^a	1.94	0. 924	Hectares tilled per year	80.00 (11.69)^c	105.27	<0.001
PAD2		60.74 (0.79)^a				114.66 (4.89)^b
PAD3		58.12 (1.91)^a				141.56 (9.04)^a
PAD4		63.42 (3.10)^a				105.13 (11.58)^c
PAD5		56.81 (3.89)^a				30.18 (12.20)^d
PAD6		61.14 (1.98)^a				29.34 (9.25)^d
PAD7		59.44 (4.94)^a				10.89 (2.00)^d
PAD1	Tractor price (millions of FCFA)	4.65 (1.42)^bcd	48.77	<0.001	Fuel used per ha (L)	10.31 (1.47)^abc	15.91	0.014
PAD2		7.57 (0.25)^a				10.20 (0.29)^bc
PAD3		6.91 (0.47)^ab				10.14 (0.49)^bc
PAD4		6.09 (0.51)^bc				10.43 (0.36)^bc
PAD5		4.59 (1.21)^cd				11.64 (0.69)^ab
PAD6		3.00 (0.71)^d				10.33 (0.90)^c
PAD7		4.50 (1.18)^d				12.86 (0.98)^a

SD = standard deviation; χ² = Statistic of Chi-2; df = degree of freedom; P = probability; the means followed by the same letters are not significantly different at 5%.