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2011
Feeding behaviour differs between dairy calves selected for divergent feed conversion efficiency, TC, Green, GC Waghorn, NJ Beausoleil, and KA MacDonald , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 71, Invercargill, p.281-285, (2011)
2010
Prediction of herbage dry matter intake for dairy cows grazing ryegrass-based pastures, J, Baudracco, N Lopez-Villalobos, CW Holmes, and KA MacDonald , Proceedings of the New Zealand Society of Animal Production, Jun, Volume 70, Palmerston North, p.80-85, (2010)
Variation in feed conversion efficiency in Holstein-Friesian heifer calves, KR, Carnie, SR Davis, KA MacDonald, GC Waghorn, VV Obolonkin, and RL Spelman , Proceedings of the New Zealand Society of Animal Production, Jun, Volume 70, Palmerston North, p.250-252, (2010)
2009
Using an existing intake model to demonstrate relationships between herbage allowance, hunger drive, days in milk and actual intake in grazing dairy cows, P, Gregorini, AJ Romera, PC Beukes, JL Rossi, and KA MacDonald , Proceedings of the New Zealand Society of Animal Production, Jun, Volume 69, Christchurch, p.28-31, (2009)
2008
Indole and skatole as markers for nitrogen utilisation in dairy cows, D, Pacheco, GA Lane, K Fraser, KA MacDonald, and PJ Back , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 68, Brisbane, Australia, p.23-26, (2008)
2007
Restricted postpartum feeding in grazing dairy heifers decreases milk production but does not lengthen oestrous interval, LM, Chagas, PJS Gore, KA MacDonald, and D Blache , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 67, Wanaka, p.255-260, (2007)
2006
Effect of cow genotype and feed allowance on milk composition, S-A, Turner, KA MacDonald, PJ Back, and NA Thomson , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 66, Napier, p.397-402, (2006)
2005
Comparing feed allowances to inferred energy intake using data from a dairy grazing farm trial, JE, Pryce, BL Harris, WA Montgomerie, R Jackson, KA MacDonald, CB Glassey, BS Thorrold, and CW Holmes , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 65, Christchurch, p.225-230, (2005)
Differences in grazing behaviour and herbage intake between genotypes of Holstein-Friesian dairy cows grazing short or long swards, JL, Rossi, KA MacDonald, BS Thorrold, J Hodgson, and CW Holmes , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 65, Christchurch, p.236-240, (2005)
Economic comparison of Holstein-Friesian strains, JE, Pryce, BL Harris, CB Glassey, WA Montgomerie, R Jackson, KA MacDonald, BS Thorrold, and CW Holmes , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 65, Christchurch, p.68-73, (2005)
Impact of farm management decision rules on the production and profit of different strains of Holstein-Friesian dairy cows, KA, MacDonald, BS Thorrold, CB Glassey, CW Holmes, and JE Pryce , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 65, Christchurch, p.40-45, (2005)
Modelling dairy system efficiencies, RN, Jensen, PC Beukes, DA Clark, and KA MacDonald , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 65, Christchurch, p.203-208, (2005)
2004
Milk production and grazing behaviour during early lactation of three strains of Holstein-Friesian dairy cows managed in different feeding systems, JL, Rossi, KA MacDonald, B Thorrold, CW Holmes, C Matthew, and J Hodgson , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 64, Hamilton, p.232-236, (2004)
2003
Evidence of a genotype by feeding level interaction in grazing Holstein-Friesian dairy cattle at different stocking rates, JR, Bryant, CW Holmes, N Lopez-Villalobos, KA MacDonald, and IM Brookes , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 63, Queenstown, p.73-76, (2003)
Postpartum anoestrous intervals and reproductive performance of three genotypes of Holstein-Friesian dairy cattle managed in a seasonal pasture-based dairy system., LR, McNaughton, GA Verkerk, TJ Parkinson, KA MacDonald, and CW Holmes , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 63, Queenstown, p.77-81, (2003)
2002
Effects of time-of-calving on dairy production: a farmlet study, MJ, Audlist, KA MacDonald, NA Thomson, M Coulter, JAS Lancaster, and JW Penno , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 62, Palmerston North, p.42-43, (2002)
Managing dairy calves using continuous stocking and sward surface height - a review, SJ, Bluett, and KA MacDonald , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 62, Palmerston North, p.124-127, (2002)
Salt supplementation of lactating cows, KA, MacDonald, JA Lile, JAS Lancaster, M Coulter, and MB O'Connor , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 62, Palmerston North, p.236-239, (2002)
A whole-farm model applied to a dairy system, ME, Wastney, CC Palliser, JA Lile, KA MacDonald, JW Penno, and KP Bright , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 62, Palmerston North, p.120-123, (2002)
2001
Adapting the MOLLY cow model to fit production data from New Zealand animals, CC, Palliser, KP Bright, KA MacDonald, JW Penno, and ME Wastney , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 61, Christchurch, p.234-236, (2001)
Magnesium supplementation of lactating dairy cows in the summer and autumn, KA, MacDonald, JW Penno, GA Verkerk, J Jago, and BW Dow , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 61, Christchurch, p.148-151, (2001)
Monitoring adrenal activity in dairy cows under various feeding regimens using faecal glucocorticoid metabolites, CJ, Morrow, ES Kolver, KA MacDonald, GA Verkerk, and LR Matthews , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 61, Christchurch, p.52-55, (2001)
Toward a predictive model of supplementary feeding response from grazing dairy cows, JW, Penno, KA MacDonald, and CW Holmes , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 61, Christchurch, p.229-233, (2001)
2000
The effect of pasture silage quality on milk production and liveweight gain of dairy cattle, KA, MacDonald, PK Nicholas, JM Kidd, JW Penno, and AR Napper , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 60, Hamilton, p.253-255, (2000)
1999
Increasing milksolids production with supplementary feeds, JW, Penno, JM McGrath, KA MacDonald, M Coulter, and JAS Lancaster , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 59, p.188-191, (1999)
Validation of body condition scoring by using ultrasound measurements of subcutaneous fat., KA, MacDonald, GA Verkerk, and JW Penno , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 59, p.177-179, (1999)
1998
Balancing pasture and maize silage diets for dairy cows using urea, soybean meal or fishmeal, KA, MacDonald, JW Penno, ES Kolver, WAC Carter, and JAS Lancaster , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 58, p.102-105, (1998)
The effect of stage of lactation and season on milksolids response to supplementary feeding of dairy cows., JW, Penno, CW Holmes, KA MacDonald, and BJ Walsh , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 58, p.113-116, (1998)
Management decision rules to optimise milksolids production on dairy farms, KA, MacDonald, and JW Penno , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 58, p.132-135, (1998)
Using nitrogen fertiliser to increase dairy farm profitability, JM, McGrath, JW Penno, KA MacDonald, and WA Carter , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 58, p.117-120, (1998)
1997
The effect of level of feeding during rearing on the first lactation milk yield of Friesian replacement heifers., JW, Penno, KA MacDonald, and AM Bryant , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 57, p.176-178, (1997)
Growth of friesian calves offered three allowances of milk replacer., KA, MacDonald, and JW Penno , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 57, p.179-181, (1997)
1996
Effect of body covers on the liveweight gain of heifer replacement calves and yearlings, and the liveweight gain and milksolids production of dairy cows, KA, MacDonald, and JW Penno , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 56, p.266-269, (1996)
Effect of nitrogen fertiliser and supplements on pasture production and milksolids yield from dairy farm systems, JW, Penno, AM Bryant, and KA MacDonald , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 56, p.236-238, (1996)
1995
Effect of nitrogen fertiliser and summer rotation length on milk production in a dry Waikato summer., JW, Penno, AM Bryant, WA Carter, and KA MacDonald , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 55, p.64-66, (1995)
1985
Comparative dairy production of Jersey and Friesians, AM, Bryant, MAS Cook, and KA MacDonald , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 45, p.7-12, (1985)
Effects of varying feeding time on diurnal calving patterns in dairy cows, KL, Macmillan, MG Pearce, PJA Copeman, KA MacDonald, and R Kilgour , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 45, p.35-38, (1985)
1983
Relationships between amount of feed on the farm, autumn-winter grazing management and dairy cow performance, AM, Bryant, and KA MacDonald , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 43, p.93-96, (1983)