Modelling Soil Water Retention for Weed Seed Germination Sensitivity to Water Potential

Table 5

Mean water content for water potential intervals based on weed seed germination sensitivity to water potential.

	Mean water content
	Water potential interval (MPa)
Main effect	Full	A	B	C	D
	−0.01 to −1.5	−0.01 to −0.1	−0.1 to −0.5	−0.5 to −1.0	−1.0 to −1.5
	(cm^3/cm^3)
Hillslope
SW	0.158	0.202	0.132	0.108	0.098
NE	0.150	0.190	0.126	0.102	0.092
Hillslope position
Summit	0.124^b	0.164^b	0.099^b	0.080^b	0.072^b
Backslope	0.141^b	0.185^b	0.114^b	0.091^b	0.082^b
Toeslope	0.196^a	0.239^a	0.175^a	0.145^a	0.132^a
Model
CA	0.153^c	0.202^a	0.125^d	0.095^c	0.083^c
BC	0.153^bc	0.198^b	0.126^c	0.100^b	0.090^b
VG5	0.153^bc	0.199^b	0.126^c	0.100^b	0.089^b
VG4	0.153^b	0.198^b	0.126^c	0.101^b	0.091^b
TA	0.156^a	0.189^d	0.137^a	0.118^a	0.109^a
RU	0.156^a	0.191^c	0.135^b	0.116^a	0.108^a
Source of variation			𝑃>𝐹
Hillslope (𝐻)	0.216	0.189	0.313	0.243	0.222
Position (𝑃)	<.001	<.001	<.001	<.001	<.001
𝐻×𝑃	0.360	0.414	0.161	0.095	0.078
Model (𝑀)	<.001	<.001	<.001	<.001	<.001
𝐻×𝑀	0.001	<.001	<.001	0.003	0.013
𝑃×𝑀	<.001	0.010	0.429	<.001	<.001
𝐻×𝑃×𝑀	<.001	0.431	0.682	0.411	0.309

Means within a column and main effect, followed by different letters are significantly different at 𝑃≤0.05 according to Fisher’s protected LSD.