Farm-gate N and P balances and use efficiencies across specialist dairy farms in the Republic Ireland

Cathal Buckley (), Paul Murphy and David Wall
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Cathal Buckley: Rural Economy and Development Programme, Teagasc, Athenry, Co. Galway, Ireland
Paul Murphy: Agricultural Catchments Programme, Teagasc, Wexford, Co. Wexford
David Wall: Johnstown Castle Research Centre, Teagasc, Wexford, Co. Wexford.

No 1302, Working Papers from Rural Economy and Development Programme,Teagasc

Abstract: This study establishes farm gate N and P balances and use efficiencies based on the average of 2 years of Teagasc National Farm Survey data in 2009 and 2010. The weighted average farm gate N surplus for this nationally representative sample of specialist dairy farms was 143.4 kg N ha-1. Average farm gate nitrogen use efficiency was 23.2%. For dairy farms operating under an EU Nitrates Derogation, the average N surplus was higher at 181.8 kg N ha-1 and averageN use efficiency was slightly lower at 22.2%. The total average farm gate P balance was 4.1 kg ha-1 in surplus, and P use efficiency averaged 83.9%. P balance ranged from -7.3 to 23.0 kg ha-1. A total of 27% had a negative P balance. The average P surplus for farms with a Nitrates Derogation was below the average of all farms at 3.5 kg P ha-1 and average P use efficiency for these Derogation farms was above the average of all farms at 90%.

Pages: 32 pages
Date: 2013
New Economics Papers: this item is included in nep-agr, nep-eff and nep-ger
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