Items where Author is "Humphreys, J."

Article

Fenger, F. and Casey, I. A. and Holden, N. M. and Humphreys, J. (2022) Access time to pasture under wet soil conditions : Effects on productivity and profitability of pasture-based dairying. Journal of Dairy Science. ISSN 0022-0302 (In Press)

Scully, K. M. and Keogh, B. and O' Brien, B. and Casey, I. A. and Humphreys, J. (2021) The effect of fertilizer nitrogen input to grass-clover swards and calving date on the productivity of pasture-based dairy production. Journal of Dairy Science, 104 (8). pp. 8870-8884. ISSN 0022-0302

Mihailescu, E. and Murphy, P. N.C. and Ryan, W. and Casey, I. A. and Humphreys, J. (2015) Phosphorus balance and use efficiency on 21 intensive grass-based dairy farms in the South of Ireland. Journal of Agricultural Science, 153 (3). pp. 520-537. ISSN 0021-8596

Mihailescu, E. and Ryan, W. and Murphy, P. N.C. and Casey, I. A. and Humphreys, J. (2015) Economic impacts of nitrogen and phosphorus use efficiency on nineteen intensive grass-based dairy farms in the South of Ireland. Agricultural Systems, 132. pp. 121-132. ISSN 0308-521X

Necpálová, M. and Li, D. and Lanigan, G. and Casey, I. A. and Burchill, W. and Humphreys, J. (2014) Changes in soil organic carbon in a clay loam soil following ploughing and reseeding of permanent grassland under temperate moist climatic conditions. Grass and Forage Science, 69 (4). pp. 611-624. ISSN 0142-5242

Mihailescu, E. and Murphy, P. N.C. and Ryan, W. and Casey, I. A. and Humphreys, J. (2014) Nitrogen balance and use efficiency on twenty-one intensive grass-based dairy farms in the South of Ireland. Journal of Agricultural Science, 152 (5). pp. 843-859. ISSN 0021-8596

Phelan, P. and Casey, I. A. and Humphreys, J. (2014) The effects of simulated summer-to-winter grazing management on herbage production in a grass-clover sward. Grass and Forage Science, 69 (2). pp. 251-265. ISSN 0142-5242

Phelan, P. and Keogh, B. and Casey, I. A. and Necpalova, M. and Humphreys, J. (2013) The effects of treading by dairy cows on soil properties and herbage production for three white clover-based grazing systems on a clay loam soil. Grass and Forage Science, 68 (4). pp. 548-563. ISSN 0142-5242

Necpálová, M. and Phelan, P. and Casey, I. and Humphreys, J. (2013) Soil surface N balances and soil N content in a clay-loam soil under Irish dairy production systems. Nutrient Cycling in Agroecosystems, 96 (1). pp. 47-65. ISSN 1385-1314

Necpálová, M. and Casey, I. and Humphreys, J. (2013) Effect of ploughing and reseeding of permanent grassland on soil N, N leaching and nitrous oxide emissions from a clay-loam soil. Nutrient Cycling in Agroecosystems, 95 (3). pp. 305-317. ISSN 1385-1314

Phelan, P. and Casey, I. A. and Humphreys, J. (2013) The effect of target postgrazing height on sward clover content, Herbage yield, And dairy production from grass-white clover pasture. Journal of Dairy Science, 96 (3). pp. 1598-1611. ISSN 0022-0302

Humphreys, J. and Mihailescu, E. and Casey, I. A. (2012) An economic comparison of systems of dairy production based on N-fertilized grass and grass-white clover grassland in a moist maritime environment. Grass and Forage Science, 67 (4). pp. 519-525. ISSN 0142-5242

Necpalova, M. and Fenton, O. and Casey, I. and Humphreys, J. (2012) N leaching to groundwater from dairy production involving grazing over the winter on a clay-loam soil. Science of the Total Environment, 432. pp. 159-172. ISSN 0048-9697

Humphreys, J. and Casey, I. A. and Laidlaw, A. S. (2009) Comparison of milk production from clover-based and fertilizer-N-based grassland on a clay-loam soil under moist temperate climatic conditions. Irish Journal of Agricultural and Food Research, 48 (2). pp. 187-207. ISSN 0791-6833

Keogh, B. and Humphreys, J. and Phelan, P. and Necpalova, M. and Casey, I. A. and Fitzgerald, E. (2009) Organic management strategies and its effect on clover-based grassland production. Irish Journal of Agricultural and Food Research, 48 (2). p. 267. ISSN 0791-6833

Phelan, P. and Keogh, B. and Casey, I. A. and Humphreys, J. (2009) The effects of rotation length and cutting height in autumn on the productivity of a perennial ryegrass-white clover sward. Irish Journal of Agricultural and Food Research, 48 (2). p. 274. ISSN 0791-6833