Experiment to study interactions between germination environment, soil disturbance and emergence.

The experiment is designed to determine how magnitude and distribution of emergence of a weed species differs with timing of superficial disturbance of the soil around the time of emergence in undisturbed soil.

In the field, this disturbance could be false seedbed or mechanical weed control (weed harrowing). In both cases, added knowledge about the effects would be beneficial.

One common seedlot is used throughout all locations. A local seedlot is used with the same treatments to compare the variability of the common seedlot between locations with the variability of the common seedlot compared to the local seedlot within a location.