The growth of barley grass (Hordeum leporinum) in annual pasture. 2. Growth comparisons with Wimmera ryegrass (Lolium rigidum)

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Abstract
Experiments to compare the growth of barley grass (Hordeum leporinum) and Wimmera ryegrass (Lolium rigidum) were carried out in small plots and boxes at Dookie College in northern Victoria, and near Melbourne. These covered a range of density, defoliation, and temperature and soil fertility conditions. At equal densities barley grass generally out-yielded rye grass over the first 50 days of growth. Frost was the only factor reducing this superiority, but high levels of nitrogen in the foliage greatly reduced frost damage. Barley grass also recovered more rapidly from defoliation. The results suggest that in frosty areas soil nitrogen levels will greatly influence the herbage production and dominance of barley grass ; in areas with milder winters, growth will be more consistent and the grass will be a more reliable forage plant.

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