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Grass and legume species/cultivars available to farmers in the summer dry east coast of New Zealand, other than the traditionally used perennial ryegrasslwhite clover, fall into 3 categories: 1. drought tolerant species/cultivars which will maintain production later into summer and respond quickly after drought, e.g. cocksfoot, tall fescue, lucerne, prairie grass. 2 . species/cultivars which will maximise production in winter and spring, e.g. prairie grass, phalaris, subterranean clover. 3. species/cultivars compatible with summer crop programmes e.g. annual ryegrasses.
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Hume et al. (1985) studied this question.
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