Table 2.

Estimates of competition parameters and their standard errors for three different crop spatial arrangements at three different relative times of weed emergence (3 days before the crop, simultaneous, and 3 days after the crop)

	Early weed emergence		Simultaneous emergence		Late weed emergence
	b wc	S.E.	b wc	S.E.	b wc	S.E.
random	0.0774	0.0269	1.32	0.136	62.4	3.6
row	0.0887	0.0273	1.41	0.138	62.9	3.6
uniform	0.113	0.0282	1.52	0.142	66.8	3.6
	b wc/b wc	S.E.	b wc/b wc	S.E.	b wc/b wc	S.E.
row/random	1.146	0.273	1.063	0.0636	1.009	0.0024
uniform/row	1.274	0.273	1.084	0.0673	1.061	0.0052
uniform/random	1.459	0.348	1.152	0.0714	1.071	0.0056

Parameter estimates (b _wc in m² g⁻¹) were obtained by fitting Eq. 1 to simulated weed biomass at 90 DAS, expressed in absolute values, 10³ and in ratios