Table 2 Analysis of physical soil properties by layer

Division		M	SE¹⁾	F	P
Bulk density	0~10cm	1.3^a	0.03	6.344	.003^*
	10~20cm	1.42^b	0.03
	20~30cm	1.43^b	0.03
Coarse fragments	0~10cm	0.22^a	0.27	.569	.569
	10~20cm	0.24^a	0.03
	20~30cm	0.26^a	0.04
Moisture content	0~10cm	17.46^b	4.91	4.263	.019^*
	10~20cm	14.25^a	3.12
	20~30cm	14.15^a	4.33
Solid ratio	0~10cm	49^a	1.18	6.189	.004^**
	10~20cm	53.63^b	1.15
	20~30cm	54.06^b	1.05
Liquid ratio	0~10cm	22.07^a	1.34	.183	.834
	10~20cm	21.35^a	1.43
	20~30cm	20.89^a	1.41
Gas ratio	0~10cm	28.92^a	1.41	2.898	.063
	10~20cm	25.02^a	1.39
	20~30cm	25.05^a	1.13
Porosity	0~10cm	53.77^b	1.26	28.137	.000^**
	10~20cm	44.45^a	0.92
	20~30cm	43.9^a	0.92
Aggregate percentage	0~10cm	54.36^b	3.75	4.500	.015^*
	10~20cm	41.35^a	3.84
	20~30cm	39.07^a	4.07
Soil hardness	0~10cm	16.08^a	0.6	12.783	.000^**
	10~20cm	18.92^b	0.7
	20~30cm	21.11^c	0.8
Sand	0~10cm	67.68^a	2.21	.276	.760
	10~20cm	69.56^a	2.24
	20~30cm	69.79^a	2.16
Silt	0~10cm	16.11^a	1.21	.189	.828
	10~20cm	15.36^a	1.24
	20~30cm	15.08^a	1.23
Clay	0~10cm	16.21^a	1.05	.370	.692
	10~20cm	15.08^a	1.08
	20~30cm	15.13^a	1.01

Standard error
p<0.05
p<0.01
A result of Duncan's multiple range test