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Table 3.

Summary of cropping systems simulated with PheraSys, with and without non-parasitic weeds.

Cropping system Modification relative to reference Non-parastic weed density (plants/m2)
No weeds With weeds
Reference R See Table 2 0 10
Diversified rotation SP Spring pea after barley 0 0.1
Mouldboard ploughing MP Ploughing before winter wheat 0 5
No tillage NT No tillage before any crop 0 100
Low density LD Sowing density of 40 seeds/m2 in OSR 0 12
Delayed sowing DS All crop sowings delayed by 3 weeks 0 5

Non-parasitic weed densities were estimated from prior simulations with the monospecific prototype AlomySys (Colbach, 2009; Colbach et al., 2010b) because the programming of the connection between the PheraSys and FlorSys softwares is still underway.

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