Species distribution within improved pastures over central [New South Wales] in relation to rainfall and altitude
1991
Kemp, D.R. | Dowling, P.M. (New South Wales Agriculture and Fisheries, Orange (Australia). Agricultural Research and Veterinary Centre)
A point quadrant survey was done over 2 successive springs. Subterranean clover was the most common legume, occurring in all parts of the region, but above 700 mm rainfall, white clover replaced it in a linear relationship. Similarly, annual grasses were ubiquitous, but replaced in a linear relationship at higher rainfalls and altitudes by perennials. Perennial species were found down to 600 mm rainfall but only exceeded the proportion of annuals where the rainfall exceeded 800 mm for legumes or 900 mm for grasses or where the altitude was above 900 m. The legume content of pastures, especially at higher rainfalls, was not considered satisfactory for animal production. Pasture recommendations need to consider the climatic limits of the ability of species to make a major contribution as well as those for mere persistence.
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