Table 3.

Fitted parameter values for the Cedergreen–Ritz–Streibig model used to describe the dose–response of the proportion of A. myosuroides seedlings surviving 6 weeks after the application of two pre‐emergence herbicides on three levels of soil organic matter. Common parameters were fitted for both herbicides

Parameter	Estimate	Standard error
b	1.777	0.2258
d	0.773	0.0451
η – low organic matter	0.097	0.0170
η – medium organic matter	0.234	0.0500
η – high organic matter	0.374	0.0850
γ	1.187	0.5743