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A 3 year (2009–2011) study found a mean N balance of 166 kg N/ha, P balance of 4.93 kg P/ha, N use efficiency of 0.24, P use efficiency of 0.71, and net profit of €598/ha on 19 Irish dairy farms. The increase in mean net profit with mean milk receipts and the decrease with mean expenditure on chemical fertilisers imply that increasing milk receipts while optimising the use of chemical fertiliser input...
White clover (Trifolium repens) is an important legume for grazed grassland that can increase the profitability and environmental sustainability of milk production. Previous experiments on mown grass-clover plots suggest that low postgrazing heights (PGH) can increase sward clover content and herbage production. However, this has not been tested in actual strip or rotational grazing systems with dairy...
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