Hypothesis: The oat variety (Garry) is non-competitive with weeds;
other varieties could be more competitive.

Experiment: 3 traditional varieties (cultvars) and 3 modern culitvars were planted on each of 5 fields (3 reps at each site), and final crop and weed biomass determined.

Observations: The three tradional cultivars, including Garry (then in use on the farm) and one of the three modern culitivars competed well with weeds; two of the three modern culitvars did not.

Conclusion: The poor oat yields were not due to poor competitiveness with weeds.

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