. 2007 Oct 17;101(8):1267–1280. doi: 10.1093/aob/mcm245

Table 2.

Von Mises stresses were significantly different in root segments R1 and R2 compared with R3 and R4, regardless of root pattern and soil type

Root surface	Von Mises stresses in individual root segments (MPa)
Root surface	R1	R2	R3	R4	F_3,12	P
Upper	0·75 ± 0·11^a	0·62 ± 0·07^a	0·13 ± 0·05^b	0·20 ± 0·08^b	15·1	<0·001
Lower	0·74 ± 0·12^a	0·57 ± 0·11^a	0·20 ± 0·04^b	0·21 ± 0·05^b	10·1	<0·001

Data are means ± s.e.

No significant differences were found between the upper and lower root surfaces. Where superscript letters differ, data are significantly different (P > 0·05).