Abstract
Pasture growth rates of ryegrass, tall fescue and phalaris were compared under combinations of 2 defoliation heights and 3 defoliation frequencies in mowing trials run in spring, summer, autumn and winter over 2 years. Lax defoliation gave on average 15%, 20% and 21% higher pasture growth rates than intense defoliation for ryegrass, tall fescue and phalaris pastures respectively over all seasons. Climate had a major influence on the response of all three pastures to defoliation management. In a dry spring, tall fescue produced most from a 15day cutting interval while for ryegrass and phalaris production was greatest from a 30day interval. In a wet spring, cutting frequency had no etfect, but a significant (P
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