Table 2.

P values obtained from Kruskal–Wallis tests on aspect ratios of four different fuel types, at each of 10 particle size ranges. All P values are unadjusted.

Feret diameter (μm)	Significance	Pairwise comparison	Pairwise significance
≤100.000	<0.001	Wood–leaves	<0.001
		Wood–other	<0.001
		Wood–grass	<0.001
		Leaves–other	0.877
		Leaves–grass	<0.001
		Other–grass	<0.001
100.001–200.000	<0.001	Wood–leaves	0.32
		Wood–other	<0.001
		Wood–grass	<0.001
		Leaves–other	<0.001
		Leaves–grass	<0.001
		Other–grass	<0.001
200.001–300.000	<0.001	All pairs	<0.001
300.001–400.000	<0.001	All pairs	<0.001
400.001–500.000	<0.001	All pairs	<0.001
500.001–600.000	<0.001	All pairs	<0.001
600.001–700.000	<0.001	All pairs	<0.001
700.001–800.000	<0.001	Wood–leaves	0.097
		Wood–other	<0.001
		Wood–grass	<0.001
		Leaves–other	<0.001
		Leaves–grass	<0.001
		Other–grass	<0.001
800.001–900.000	<0.001	Wood–leaves	<0.001
		Wood–other	<0.001
		Wood–grass	<0.001
		Leaves–other	0.021
		Leaves–grass	<0.001
		Other–grass	<0.001
900.001–1000.000	<0.001	Wood–leaves	0.188
		Wood–other	<0.001
		Wood–grass	<0.001
		Leaves–other	0.004
		Leaves–grass	<0.001
		Other–grass	0.021