Bill Wales

Volatile fatty acids in ruminal fluid can be used to predict methane yield of dairy cows

SRO Williams, MC Hannah, JL Jacobs, WJ Wales, PJ Moate

Journal article  |  2019  |  Animals

The dry matter intake (DMI) of forage-fed cattle can be used to predict their methane emissions. However, many cattle are fed conc..

Genomic prediction of serum biomarkers of health in early lactation.

TDW Luke, TTT Nguyen, S Rochfort, WJ Wales, CM Richardson, M Abdelsayed, JE Pryce

Journal article  |  2019  |  Journal of Dairy Science

In this study, we estimated genetic parameters and genomic prediction accuracies of serum biomarkers of health in early-lactation ..

A Whole-farm Investment Analysis of a Partial Mixed Ration Feeding System for Dairy Cows

S Henty, C Ho, M Auldist, W Wales, L Malcolm

Journal article  |  2019  |  Animal Production Science

Aim: A dairy farm in south-west Victoria was analysed to discern the impact on profit and risk of changing from a feeding system i..

Modification of the sterol profile in milk through feeding.

S Duong, N Strobel, S Buddhadasa, MJ Auldist, WJ Wales, PJ Moate, G Cox, JD Orbell, MJ Cran

Journal article  |  2019  |  Journal of Dairy Science

The fortification of milk with phytosterols is an increasingly common practice to enhance the sterol profile and offer consumers p..

Responses to metabolic challenges in dairy cows with high or low milk yield during an extended lactation

LC Marett, MJ Auldist, WJ Wales, KL Macmillan, FR Dunshea, BJ Leury

Journal article  |  2019  |  Journal of Dairy Science

Associations between immune competence, stress responsiveness, and production in Holstein-Friesian and Holstein-Friesian x Jersey heifers reared in a pasture-based production system in Australia

JW Aleri, BC Hine, MF Pyman, PD Mansell, WJ Wales, B Mallard, MA Stevenson, AD Fisher

Journal article  |  2019  |  Journal of Dairy Science

Effect of dietary fat supplementation on methane emissions from dairy cows fed wheat or corn

PS Alvarez-Hess, SRO Williams, JL Jacobs, MC Hannah, KA Beauchemin, RJ Eckard, WJ Wales, GL Morris, PJ Moate

Journal article  |  2019  |  Journal of Dairy Science

Metabolic profiling of early-lactation dairy cows using milk mid-infrared spectra

TDW Luke, S Rochfort, WJ Wales, V Bonfatti, L Marett, JE Pryce

Journal article  |  2019  |  Journal of Dairy Science

Metabolic disorders in early lactation have negative effects on dairy cow health and farm profitability. One method for monitoring..

Effect of wheat adaptation strategies on rumen parameters and dry matter intake of late lactation dairy cows

VM Russo, BJ Leury, E Kennedy, MC Hannah, MJ Auldist, WJ Wales

Journal article  |  2019  |  Animal Production Science

Evaluation of the n-alkane technique for estimating herbage dry matter intake of dairy cows offered herbage harvested at two different stages of growth in summer and autumn

MM Wright, E Lewis, B Garry, N Galvin, FR Dunshea, MC Hannah, MJ Auldist, WJ Wales, P Dillon, E Kennedy

Journal article  |  2019  |  Animal Feed Science and Technology

Effects of feeding wheat or corn and of rumen fistulation on milk production and methane emissions of dairy cows

PJ Moate, SRO Williams, MH Deighton, MC Hannah, BE Ribaux, GL Morris, JL Jacobs, J Hill, WJ Wales

Journal article  |  2019  |  Animal Production Science

There has been little research that has quantified methane (CH4) yields when dairy cows consume diets containing wheat grain. Furt..

Quantifying the ruminal degradation of nutrients in three cultivars of perennial ryegrass (Lolium perenne L.) sampled during early spring and summer

ML Douglas, MJ Auldist, JL Jacobs, MC Hannah, SC Garcia, WJ Wales

Journal article  |  2019  |  Animal Production Science

Context The Australian dairy industry is characterised by pasture-based feeding systems, where grazed pasture is commonly suppleme..

Predicting milk fatty acids and energy balance of dairy cows in Australia using milk mid-infrared spectroscopy

PN Ho, LC Marett, WJ Wales, M Axford, EM Oakes, JE Pryce

Journal article  |  2019  |  Animal Production Science

Mid-infrared spectroscopy (MIRS) is traditionally used for analysing milk fat, protein and lactose concentrations in dairy product..

Milk production of cows grazing pasture supplemented by a partial mixed ration with or without canola meal

MJ Auldist, MM Wright, LC Marett, MC Hannah, E Kennedy, JL Jacobs, WJ Wales

Journal article  |  2019  |  Animal Production Science

Milk production responses were measured in grazing cows offered mixed rations with or without canola meal. Experiments were conduc..

Influence of proportion of wheat in a pasture-based diet on milk yield, methane emissions, methane yield, and ruminal protozoa of dairy cows

PJ Moate, MH Deighton, J Jacobs, BE Ribaux, GL Morris, MC Hannah, D Mapleson, MS Islam, WJ Wales, SRO Williams

Journal article  |  2019  |  Journal of Dairy Science

Forage type influences milk yield and ruminal responses to wheat adaptation in late-lactation dairy cows

VM Russo, BJ Leury, E Kennedy, MC Hannah, MJ Auldist, WJ Wales

Journal article  |  2018  |  Journal of Dairy Science

Influence of acid hydrolysis, saponification and sample clean-up on the measurement of phytosterols in dairy cattle feed using GC-MS and GC with flame ionization detection.

Samantha Duong, Norbert Strobel, Saman Buddhadasa, Katherine Stockham, Martin J Auldist, William J Wales, Peter J Moate, John D Orbell, Marlene J Cran

Journal article  |  2018  |  Journal of Separation Science

The fortification of processed foods including dairy products is increasingly commonplace with phytosterols among many compounds u..

Adaptation responses in milk fat yield and methane emissions of dairy cows when wheat was included in their diet for 16 weeks

PJ Moate, JL Jacobs, MC Hannah, GL Morris, KA Beauchemin, PS Alvarez Hess, RJ Eckard, Z Liu, S Rochfort, WJ Wales, SRO Williams

Journal article  |  2018  |  Journal of Dairy Science

Responses of dairy cows with divergent residual feed intake as calves to metabolic challenges during midlactation and the nonlactating period

K DiGiacomo, E Norris, FR Dunshea, BJ Hayes, LC Marett, WJ Wales, BJ Leury

Journal article  |  2018  |  Journal of Dairy Science

Plasma glucose and nonesterified fatty acids response to epinephrine challenges in dairy cows during a 670-d lactation

LC Marett, MJ Auldist, WJ Wales, KL Macmillan, FR Dunshea, BJ Leury

Journal article  |  2018  |  Journal of Dairy Science

Influence of feeding supplements of almond hulls and ensiled citrus pulp on the milk production, milk composition, and methane emissions of dairy cows

SRO Williams, AV Chaves, MH Deighton, JL Jacobs, MC Hannah, BE Ribaux, GL Morris, WJ Wales, PJ Moate

Journal article  |  2018  |  Journal of Dairy Science

Almond hulls and citrus pulp have been fed to dairy cows with variable responses for milk production, but no information exists on..

Evaluating the economics of concentrate feeding decisions in grazing dairy cows

CKM Ho, JW Heard, WJ Wales, JL Jacobs, PT Doyle, B Malcolm

Journal article  |  2018  |  Animal Production Science

Evaluating the economics of short-term partial mixed ration feeding decisions for dairy cows

CKM Ho, WJ Wales, MJ Auldist, B Malcolm

Journal article  |  2018  |  Animal Production Science

Wheat is more potent than corn or barley for dietary mitigation of enteric methane emissions from dairy cows

PJ Moate, SRO Williams, JL Jacobs, MC Hannah, KA Beauchemin, RJ Eckard, WJ Wales

Journal article  |  2017  |  Journal of Dairy Science

Effects of pasture allowance on milk production of dairy cows offered increasing amounts of partial mixed rations in spring

MJ Auldist, MM Wright, LC Marett, JL Jacobs, WJ Wales

Journal article  |  2017  |  Animal Production Science

Rumen degradability characteristics of five starch-based concentrate supplements used on Australian dairy farms

RP McDonnell, M vH Staines, ML Douglas, MJ Auldist, JL Jacobs, WJ Wales

Journal article  |  2017  |  Animal Production Science

Partitioning of energy and nitrogen in lactating primiparous and multiparous Holstein-Friesian cows with divergent residual feed intake

LC Marett, SRO Williams, BJ Hayes, JE Pryce, WJ Wales

Journal article  |  2017  |  Animal Production Science

Residual feed intake (RFI) is the difference between an animal’s actual and expected feed intake. Two experiments were conducted c..

Responses of dairy cows to short-term heat stress in controlled-climate chambers

JB Garner, M Douglas, SRO Williams, WJ Wales, LC Marett, K DiGiacomo, BJ Leury, BJ Hayes

Journal article  |  2017  |  Animal Production Science

Can concentrations of trans octadecenoic acids in milk fat be used to predict methane yields of dairy cows?

PJ Moate, SRO Williams, MH Deighton, MC Hannah, JL Jacobs, WJ Wales

Journal article  |  2017  |  Animal Production Science

Whole-tract digestibility and nitrogen-use efficiency of partial mixed rations with and without canola meal

VM Russo, LC Marett, MM Wright, MJ Auldist, WJ Wales

Journal article  |  2017  |  Animal Production Science

Increasing the crude protein (CP) concentration of a ration fed to grazing dairy cows by adding canola meal can increase milk prod..

Dry matter intake and feeding behaviour of grazing dairy cows offered a mixed ration with or without canola meal

MM Wright, MJ Auldist, E Kennedy, N Galvin, FR Dunshea, WJ Wales

Journal article  |  2017  |  Animal Production Science

Partitioning of dietary nitrogen in response to feeding cereal grain supplements to dairy cows during four periods of an extended lactation

PJ Moate, SRO Williams, MC Hannah, LC Marett, MJ Auldist, JL Jacobs, WJ Wales

Journal article  |  2017  |  Animal Production Science

Heat Stress in Dairy Cattle Alters Lipid Composition of Milk.

Z Liu, V Ezernieks, J Wang, N Wanni Arachchillage, JB Garner, WJ Wales, BG Cocks, S Rochfort

Journal article  |  2017  |  Scientific Reports

Heat stress, potentially affecting both the health of animals and the yield and composition of milk, occurs frequently in tropical..

Responses of plasma glucose and nonesterified fatty acids to intravenous insulin tolerance tests in dairy cows during a 670-day lactation

LC Marett, MJ Auldist, WJ Wales, KL Macmillan, FR Dunshea, BJ Leury

Journal article  |  2017  |  Journal of Dairy Science

Analysis of pasture supplementation strategies by means of a mechanistic model of ruminal digestion and metabolism in the dairy cow

JP McNamara, MJ Auldist, LC Marett, PJ Moate, WJ Wales

Journal article  |  2017  |  Journal of Dairy Science

Genomic Selection Improves Heat Tolerance in Dairy Cattle (vol 6, 34114, 2017)

JB Garner, ML Douglas, SRO Williams, WJ Wales, LC Marett, TTT Nguyen, CM Reich, BJ Hayes

Journal article  |  2017  |  Scientific Reports

Predicting milk responses to cereal-based supplements in grazing dairy cows

JW Heard, M Hannah, CKM Ho, E Kennedy, PT Doyle, JL Jacobs, WJ Wales

Journal article  |  2017  |  Animal Production Science

Challenges of feeding dairy cows in Australia and New Zealand

WJ Wales, ES Kolver

Journal article  |  2017  |  Animal Production Science

There is a continuing evolution of feeding systems in both Australian and New Zealand dairy industries and this presents challenge..

Evaluating the ability of a lifetime nutrient-partitioning model for simulating the performance of Australian Holstein dairy cows

HN Phuong, NC Friggens, O Martin, P Blavy, BJ Hayes, WJ Wales, JE Pryce

Journal article  |  2017  |  Animal Production Science

The present study determined the ability of a lifetime nutrient-partitioning model to simulate individual genetic potentials of Au..

An assessment of immune and stress responsiveness in Holstein-Friesian cows selected for high and low feed conversion efficiency

JW Aleri, BC Hine, MF Pyman, PD Mansell, WJ Wales, B Mallard, AD Fisher

Journal article  |  2017  |  Animal Production Science

Rapid measurement of phytosterols in fortified food using gas chromatography with flame ionization detection

Samantha Duong, Norbert Strobel, Saman Buddhadasa, Katherine Stockham, Martin Auldist, Bill Wales, John Orbell, Marlene Cran

Journal article  |  2016  |  Food Chemistry

A novel method for the measurement of total phytosterols in fortified food was developed and tested using gas chromatography with ..

Periparturient immunosuppression and strategies to improve dairy cow health during the periparturient period

JW Aleri, BC Hine, MF Pyman, PD Mansell, WJ Wales, B Mallard, AD Fisher

Journal article  |  2016  |  Research in Veterinary Science

Genomic Selection Improves Heat Tolerance in Dairy Cattle

JB Garner, ML Douglas, SRO Williams, WJ Wales, LC Marett, TTT Nguyen, CM Reich, BJ Hayes

Journal article  |  2016  |  Scientific Reports

Variation in feeding behavior and milk production among dairy cows when supplemented with 2 amounts of mixed ration in combination with 2 amounts of pasture

MM Wright, MJ Auldist, E Kennedy, FR Dunshea, M Hannah, WJ Wales

Journal article  |  2016  |  Journal of Dairy Science

Incorporating mixed rations and formulated grain mixes into the diet of grazing cows: Effects on milk composition and coagulation properties, and the yield and quality of Cheddar cheese

MJ Auldist, JS Greenwood, MM Wright, M Hannah, RPW Williams, PJ Moate, WJ Wales

Journal article  |  2016  |  Journal of Dairy Science

Effects of different strategies for feeding supplements to grazing dairy cows on the composition and coagulation properties of mil..

Milk production responses to different strategies for feeding supplements to grazing dairy cows

MJ Auldist, LC Marett, JS Greenwood, MM Wright, M Hannah, JL Jacobs, WJ Wales

Journal article  |  2016  |  Journal of Dairy Science

Reducing the carbon footprint of Australian milk production by mitigation of enteric methane emissions

Peter J Moate, Matthew H Deighton, S Richard O Williams, Jennie E Pryce, Ben J Hayes, Joe L Jacobs, Richard J Eckard, Murray C Hannah, William J Wales

Journal article  |  2016  |  Animal Production Science

Milk production and composition, and methane emissions from dairy cows fed lucerne hay with forage brassica or chicory

SRO Williams, PJ Moate, MH Deighton, MC Hannah, WJ Wales, JL Jacobs

Journal article  |  2016  |  Animal Production Science

Hot topic: Definition and implementation of a breeding value for feed efficiency in dairy cows

JE Pryce, O Gonzalez-Recio, G Nieuwhof, WJ Wales, MP Coffey, BJ Hayes, ME Goddard

Journal article  |  2015  |  Journal of Dairy Science

Influence of pasture-based feeding systems on fatty acids, organic acids and volatile organic flavour compounds in yoghurt

Ghazal Akbaridoust, Tim Plozza, V Craige Trenerry, William J Wales, Martin J Auldist, Said Ajlouni

Journal article  |  2015  |  Journal of Dairy Research

Assessing adaptive immune response phenotypes in Australian Holstein-Friesian heifers in a pasture-based production system

JW Aleri, BC Hine, MF Pyman, PD Mansell, WJ Wales, B Mallard, AD Fisher

Journal article  |  2015  |  Journal of Animal Science

The effects on ruminal pH and serum haptoglobin after feeding a grain-based supplement to grazing dairy cows as a partial mixed ration or during milking

JE Coombe, MF Pyman, PD Mansell, MJ Auldist, GA Anderson, WJ Wales, MJ Conley, S Manos, M Hannah, AD Fisher

Journal article  |  2015  |  The Veterinary Journal

Invited review: An evaluation of the likely effects of individualized feeding of concentrate supplements to pasture-based dairy cows

JL Hills, WJ Wales, FR Dunshea, SC Garcia, JR Roche

Journal article  |  2015  |  Journal of Dairy Science

Michaelis-Menten kinetics predict the rate of SF6 release from permeation tubes used to estimate methane emissions from ruminants

PJ Moate, MH Deighton, BE Ribaux, MC Hannah, WJ Wales, SRO Williams

Journal article  |  2015  |  Animal Feed Science and Technology

Immune function as a predictor of dairy cattle health and disease

P MANSELL, JW Aleri, BC Hine, MF Pyman, WJ Wales, B Mallard, AD Fisher

Conference Proceedings  |  2015

Response of plasma glucose, insulin, and nonesterified fatty acids to intravenous glucose tolerance tests in dairy cows during a 670-day lactation

LC Marett, MJ Auldist, PJ Moate, WJ Wales, KL Macmillan, FR Dunshea, BJ Leury

Journal article  |  2015  |  Journal of Dairy Science

A modified sulphur hexafluoride tracer technique enables accurate determination of enteric methane emissions from ruminants

Matthew H Deighton, S Richard O Williams, Murray C Hannah, Richard J Eckard, Tommy M Boland, William J Wales, Peter J Moate

Journal article  |  2014  |  Animal Feed Science and Technology

Effects of partial mixed rations and supplement amounts on milk production and composition, ruminal fermentation, bacterial communities, and ruminal acidosis

HM Golder, SE Denman, C McSweeney, WJ Wales, MJ Auldist, MM Wright, LC Marett, JS Greenwood, MC Hannah, P Celi, E Bramley, IJ Lean

Journal article  |  2014  |  Journal of Dairy Science

Grape marc reduces methane emissions when fed to dairy cows

PJ Moate, SR Williams, VA Torok, MC Hannah, BE Ribaux, MH Tavendale, RJ Eckard, JL Jacobs, MJ Auldist, WJ Wales

Journal article  |  2014  |  Journal of Dairy Science

Space allowance and barriers influence cow competition for mixed rations fed on a feed-pad between bouts of grazing

AD Hetti Arachchige, AD Fisher, WJ Wales, MJ Auldist, MC Hannah, EC Jongman

Journal article  |  2014  |  Journal of Dairy Science

Influence of different systems for feeding supplements to grazing dairy cows on milk fatty acid composition

Ghazal Akbaridoust, Tim Plozza, Victor C Trenerry, William J Wales, Martin J Auldist, Frank R Dunshea, Said Ajlouni

Journal article  |  2014  |  Journal of Dairy Research

Effects of dietary cottonseed oil and tannin supplements on protein and fatty acid composition of bovine milk

Aprianita Aprianita, Osaana N Donkor, Peter J Moate, S Richard O Williams, Martin J Auldist, Jae S Greenwood, Murray C Hannah, William J Wales, Todor Vasiljevic

Journal article  |  2014  |  Journal of Dairy Research

Holstein-Friesian calves selected for divergence in residual feed intake during growth exhibited significant but reduced residual feed intake divergence in their first lactation

KA Macdonald, JE Pryce, RJ Spelman, SR Davis, WJ Wales, GC Waghorn, YJ Williams, LC Marett, BJ Hayes

Journal article  |  2014  |  Journal of Dairy Science

Residual feed intake (RFI), as a measure of feed conversion during growth, was estimated for around 2,000 growing Holstein-Friesia..

Thermoregulatory differences in lactating dairy cattle classed as efficient or inefficient based on residual feed intake

K DiGiacomo, LC Marett, WJ Wales, BJ Hayes, FR Dunshea, BJ Leury

Journal article  |  2014  |  Animal Production Science

Methane emissions of dairy cows cannot be predicted by the concentrations of C8:0 and total C18 fatty acids in milk

SRO Williams, PJ Moate, MH Deighton, MC Hannah, WJ Wales

Journal article  |  2014  |  Animal Production Science

Evaluation of growth hormone response to insulin-induced hypoglycaemia in dairy cattle during a 670-day lactation

LC Marett, MJ Auldist, WJ Wales, KL Macmillan, K DiGiacomo, BJ Leury

Journal article  |  2014  |  Animal Production Science

Replacing wheat with canola meal in a partial mixed ration increases the milk production of cows grazing at a restricted pasture allowance in spring

MJ Auldist, LC Marett, JS Greenwood, MM Wright, M Hannah, JL Jacobs, WJ Wales

Journal article  |  2014  |  Animal Production Science

Feeding a partial mixed ration once a day did not increase milk production compared with feeding grain in the dairy and forage in the paddock

MM Wright, LC Marett, JS Greenwood, M Hannah, JL Jacobs, WJ Wales, MJ Auldist

Journal article  |  2014  |  Animal Production Science

Ruminal pH and whole-tract digestibility in dairy cows consuming fresh cut herbage plus concentrates and conserved forage fed either separately or as a partial mixed ration

JS Greenwood, MJ Auldist, LC Marett, MC Hannah, JL Jacobs, WJ Wales

Journal article  |  2014  |  Animal Production Science

Whole-tract dry matter and nitrogen digestibility of lactating dairy cows selected for phenotypic divergence in residual feed intake

JB Thornhill, LC Marett, MJ Auldist, JS Greenwood, JE Pryce, BJ Hayes, WJ Wales

Journal article  |  2014  |  Animal Production Science

The objective of this experiment was to compare the whole-tract digestibility of dry matter (DM) and nitrogen (N) in Holstein-Frie..

Genomic selection for feed efficiency in dairy cattle

JE Pryce, WJ Wales, Y de Haas, RF Veerkamp, BJ Hayes

Journal article  |  2014  |  Animal

Feed is a major component of variable costs associated with dairy systems and is therefore an important consideration for breeding..

Short communication: Validation of genomic breeding value predictions for feed intake and feed efficiency traits

JE Pryce, O Gonzalez-Recio, JB Thornhill, LC Marett, WJ Wales, MP Coffey, Y de Haas, RF Veerkamp, BJ Hayes

Journal article  |  2014  |  Journal of Dairy Science

Validating genomic prediction equations in independent populations is an important part of evaluating genomic selection. Published..

The effects on claw health of supplement feeding grazing dairy cows on feed pads

Joanne E Coombe, Michael F Pyman, Peter D Mansell, Martin J Auldist, Garry A Anderson, William J Wales, Jakob Malmo, Melanie J Conley, Andrew D Fisher

Journal article  |  2013  |  Veterinary Journal

Ultra-high-performance liquid chromatography-ion trap mass spectrometry characterisation of milk polar lipids from dairy cows fed different diets

V Craige Trenerry, Ghazal Akbaridoust, Tim Plozza, Simone Rochfort, William J Wales, Martin Auldist, Said Ajlouni

Journal article  |  2013  |  Food Chemistry

Effects of different systems of feeding supplements on time budgets of cows grazing restricted pasture allowances

Anoma D Hetti Arachchige, Andrew D Fisher, Martin J Auldist, William J Wales, Ellen C Jongman

Journal article  |  2013  |  Applied Animal Behaviour Science

Effects of feeding algal meal high in docosahexaenoic acid on feed intake, milk production, and methane emissions in dairy cows

PJ Moate, SRO Williams, MC Hannah, RJ Eckard, MJ Auldist, BE Ribaux, JL Jacobs, WJ Wales

Journal article  |  2013  |  Journal of Dairy Science

Latent Biochemical Relationships in the Blood-Milk Metabolic Axis of Dairy Cows Revealed by Statistical Integration of H-1 NMR Spectroscopic Data

Anthony D Maher, Benjamin Hayes, Benjamin Cocks, Leah Marett, William J Wales, Simone J Rochfort

Journal article  |  2013  |  Journal of Proteome Research

A detailed understanding of the relationships between the distinct metabolic compartments of blood and milk would be of potential ..

Effects of different strategies for feeding supplements on milk production responses in cows grazing a restricted pasture allowance

MJ Auldist, LC Marett, JS Greenwood, M Hannah, JL Jacobs, WJ Wales

Journal article  |  2013  |  Journal of Dairy Science

Energy partitioning in herbage-fed dairy cows offered supplementary grain during an extended lactation

SRO Williams, T Clarke, MC Hannah, LC Marett, PJ Moate, MJ Auldist, WJ Wales

Journal article  |  2013  |  Journal of Dairy Science

Use of partial mixed rations in pasture-based dairying in temperate regions of Australia

WJ Wales, LC Marett, JS Greenwood, MM Wright, JB Thornhill, JL Jacobs, CKM Ho, MJ Auldist

Journal article  |  2013  |  Animal Production Science

Performance, return and risk of different dairy systems in Australia and New Zealand

CKM Ho, M Newman, DE Dalley, S Little, WJ Wales

Journal article  |  2013  |  Animal Production Science

The economics of subsurface drip irrigation on perennial pastures and fodder production in Australia

JW Heard, MJ Porker, DP Armstrong, L Finger, CKM Ho, WJ Wales, B Malcolm

Journal article  |  2012  |  Agricultural Water Management

The impact of system changes to a dairy farm in south-west Victoria: Risk and increasing profitability

JW Heard, CM Leddin, DP Armstrong, CKM Ho, KA Tarrant, B Malcolm, WJ Wales

Journal article  |  2012  |  Animal Production Science

A case study modelling approach was used to examine changes to a dairy farm in south-west Victoria to maintain or increase profit ..

Accuracy of genomic predictions of residual feed intake and 250-day body weight in growing heifers using 625,000 single nucleotide polymorphism markers

JE Pryce, J Arias, PJ Bowman, SR Davis, KA Macdonald, GC Waghorn, WJ Wales, YJ Williams, RJ Spelman, BJ Hayes

Journal article  |  2012  |  Journal of Dairy Science

Feed makes up a large proportion of variable costs in dairying. For this reason, selection for traits associated with feed convers..

Effects of wild-type, AR1 and AR37 endophyte-infected perennial ryegrass on dairy production in Victoria, Australia

PJ Moate, SRO Williams, C Grainger, MC Hannah, D Mapleson, MJ Auldist, JS Greenwood, AJ Popay, DE Hume, WJ Mace, WJ Wales

Journal article  |  2012  |  Animal Production Science

The impact of system changes to a dairy farm in south-west Victoria: risk and increasing profitability

JW Heard, CM Leddin, DP Armstrong, CKM Ho, KA Tarrant, B Malcolm, WJ Wales

Journal article  |  2012  |  ANIMAL PRODUCTION SCIENCE

Background matters with the SF6 tracer method for estimating enteric methane emissions from dairy cows: A critical evaluation of the SF6 procedure

SRO Williams, PJ Moate, MC Hannah, BE Ribaux, WJ Wales, RJ Eckard

Journal article  |  2011  |  Animal Feed Science and Technology

Temporal changes in plasma concentrations of hormones and metabolites in pasture-fed dairy cows during extended lactation

LC Marett, MJ Auldist, C Grainger, WJ Wales, D Blache, KL Macmillan, BJ Leury

Journal article  |  2011  |  Journal of Dairy Science

Variation in residual feed intake in Holstein-Friesian dairy heifers in southern Australia

YJ Williams, JE Pryce, C Grainger, WJ Wales, N Linden, M Porker, BJ Hayes

Journal article  |  2011  |  Journal of Dairy Science

Feed conversion efficiency of dairy cattle is an important component of the profitability of dairying, given that the cost of feed..

Calculating dry matter consumption of dairy herds in Australia: the need to fully account for energy requirements and issues with estimating energy supply

JW Heard, PT Doyle, SA Francis, MVH Staines, WJ Wales

Journal article  |  2011  |  Animal Production Science

Feed costs are the major component of the variable costs and a significant component of the total costs of milk production on Aust..

Evaluating options to increase profitability on a dairy farm in southwest Victoria, Australia

B Malcolm, CM LEDDIN, JW Heard, KA Tarrant, CKM Ho, WJ Wales

Conference Proceedings  |  2011  |  18th International Farm Management Congress

A simulation study was conducted to examine the profitability of three ‘alternative futures’ for a dairy farm facing declining ter..

Feed conversion efficiency and marginal milk production responses of pasture-fed dairy cows offered supplementary grain during an extended lactation

MJ Auldist, C Grainger, KL Macmillan, LC Marett, M Hannah, BJ Leury, WJ Wales

Journal article  |  2011  |  Animal Production Science

Evaluating development options for a rain-fed dairy farm in Gippsland

DP Armstrong, KA Tarrant, CKM Ho, LR Malcolm, WJ Wales

Journal article  |  2010  |  Animal Production Science

Digestion during continuous culture fermentation when replacing perennial ryegrass with barley and steam-flaked corn

WJ Wales, ES Kolver, AR Egan

Journal article  |  2009  |  Journal of Dairy Science

Effects of strain of Holstein-Friesian and concentrate supplementation on the fatty acid composition of milk fat of dairy cows grazing pasture in early lactation

WJ Wales, ES Kolver, AR Egan, JR Roche

Journal article  |  2009  |  Journal of Dairy Science

Comparing irrigated biodynamic and conventionally managed dairy farms. 2. Milk production and composition and animal health

LL Burkitt, WJ Wales, JW McDonald, DR Small, ML Jenkin

Journal article  |  2007  |  Australian Journal of Experimental Agriculture

Ten paired irrigated dairy farms under biodynamic (BD) and conventional (CV) management were compared over a 3-year period (1991–9..

Comparing irrigated biodynamic and conventionally managed dairy farms. 1. Soil and pasture properties

LL Burkitt, DR Small, JW McDonald, WJ Wales, ML Jenkin

Journal article  |  2007  |  Australian Journal of Experimental Agriculture

Ten paired irrigated dairy farms under biodynamic (BD) and conventional (CV) management were compared over a 4-year period (1991–9..

Profitable feeding of dairy cows on irrigated dairy farms in northern Victoria

WJ Wales, JW Heard, CKM Ho, CM Leddin, CR Stockdale, GP Walker, PT Doyle

Conference Proceedings  |  2006  |  Australian Journal of Experimental Agriculture

Milk production per cow and per farm in the irrigated region in northern Victoria have increased dramatically over the past 2 deca..

Plant and sward characteristics to achieve high intake in ruminants

WJ Wales, CR Stockdale, PT Doyle

Book Chapter  |  2005

Effects of grain or hay supplementation on the chewing behaviour and stability of rumen fermentation of dairy cows grazing perennial ryegrass-based pasture in spring

YJ Williams, WJ Wales, PT Doyle, AR Egan, CR Stockdale

Journal article  |  2005  |  Australian Journal of Experimental Agriculture

Diurnal variation in ruminal pH on the digestibility of highly digestible perennial ryegrass during continuous culture fermentation

WJ Wales, ES Kolver, PL Thorne, AR Egan

Journal article  |  2004  |  Journal of Dairy Science

Diet Check - a tactical decision support tool for feeding decisions with grazing dairy cows

JW Heard, DC Cohen, PT Doyle, WJ Wales, CR Stockdale

Journal article  |  2004  |  Animal Feed Science and Technology

Defoliation pattern, foraging behaviour and diet selection by lactating dairy cows in response to sward height and herbage allowance of a ryegrass-dominated pasture

J Tharmaraj, WJ Wales, DF Chapman, AR Egan

Journal article  |  2003  |  Grass and Forage Science

Influence of pasture and concentrates in the diet of grazing dairy cows on the fatty acid composition of milk

CR Stockdale, GP Walker, WJ Wales, DE Dalley, A Birkett, ZP Shen, PT Doyle

Journal article  |  2003  |  Journal of Dairy Research

In five short-term experiments conducted in Victoria in 1997 and 1998, grazing dairy cows were given either pasture alone or pastu..

Effect of cereal grain and fibre supplements on the fatty acid composition of milk fat of grazing dairy cows in early lactation

C Wijesundera, ZP Shen, WJ Wales, DE Dalley

Journal article  |  2003  |  Journal of Dairy Research

Two experiments were undertaken to determine the effects of cereal grain and fibre (hay or straw) supplements on the fatty acid co..

Effect of grain and straw supplementation on marginal milk-production responses and rumen fermentation of cows grazing highly digestible subterranean clover pasture

WJ Wales, PT Doyle

Journal article  |  2003  |  Australian Journal of Experimental Agriculture

The marginal milk-production response to cereal grain supplementation of dairy cows grazing irrigated subterranean clover (Trifoli..

Concentrates can reduce the milkfat concentration of grazing dairy cows

CR Stockdale, GP Walker, WJ Wales, PT Doyle

Journal article  |  2001  |  Australian Journal of Dairy Technology

The effect of cereal grain-based supplements on the concentration of CLA in milkfat of dairy cows grazing perennial pastures

GP Walker, CR Stockdale, WJ Wales, A Birkett, Z Shen, PT Doyle

Journal article  |  2001  |  Australian Journal of Dairy Technology

Increasing energy intake improves milk protein concentration in cows in spring and summer

WJ Wales, CR Stockdale, PT Doyle

Journal article  |  2001  |  Australian Journal of Dairy Technology

The effect of cereal grain supplements on the solid fat content of milkfat of dairy cows grazing perennial pastures

GP Walker, CR Stockdale, WJ Wales, DE Dalley, A Birkett, Z Shen, PT Doyle

Journal article  |  2001  |  Australian Journal of Dairy Technology

Effect of pasture type and intake on the rumen pH of grazing dairy cows in spring

YJ Williams, GP Walker, WJ Wales, PT Doyle

Journal article  |  2001  |  Australian Journal of Dairy Technology

Effect of pasture intake on CLA in the milkfat of grazing dairy cows

CR Stockdale, GP Walker, WJ Wales, DE Dalley, A Birkett, Z Shen, PT Doyle

Journal article  |  2001  |  Australian Journal of Dairy Technology

Effect of grain supplementation and the provision of chemical or physical fibre on marginal milk production responses of cows grazing perennial ryegrass pastures

WJ Wales, YJ Williams, PT Doyle

Journal article  |  2001  |  Australian Journal of Experimental Agriculture

An experiment was undertaken to establish the marginal milk production response from cereal grain supplementation by dairy cows gr..

Effect of level of grain supplementation on milk production responses of dairy cows in mid-late lactation when grazing irrigated pastures high in paspalum (Paspalum dilatatum Poir.)

GP Walker, CR Stockdale, WJ Wales, PT Doyle, DW Dellow

Journal article  |  2001  |  Australian Journal of Experimental Agriculture

Two grazing experiments tested the hypothesis that a cereal grain-based supplement, fed to cows that are in mid–late lactation and..

The grazing behaviour of cows grazing Persian clover or perennial ryegrass pastures in spring

YJ Williams, GP Walker, WJ Wales, PT Doyle

Journal article  |  2000  |  Asian-Australasian Journal of Animal Sciences

Pasture allowance x pasture intake relationships: Victorian and overseas data

DC Cohen, PT Doyle, CR Stockdale, WJ Wales

Journal article  |  2000  |  Asian-Australasian Journal of Animal Sciences

Effects of feeding additional pasture hay in autumn to dairy cows grazing irrigated perennial ryegrass-white clover pasture and supplemented with barley grain

WJ Wales, DW Dellow, PT Doyle, AR Egan

Journal article  |  2000  |  Australian Journal of Experimental Agriculture

Protein supplementation of cows grazing limited amounts of paspalum (Paspalum dilatatum Poir.)-dominant irrigated pasture in mid lactation

WJ Wales, DW Dellow, PT Doyle

Journal article  |  2000  |  Australian Journal of Experimental Agriculture

Two experiments were undertaken in summer to investigate production responses by dairy cows offered paspalum (Paspalum dilatatum P..

Degradabilities of dry matter and crude protein from perennial herbage and supplements used in dairy production systems in Victoria

WJ Wales, DW Dellow, PT Doyle

Journal article  |  1999  |  Australian Journal of Experimental Agriculture

Summary The nylon bag technique was used to estimate the degradability of the dry matter (DM) and crude protein (CP) of herbage sa..

Effects of variations in herbage mass, allowance, and level of supplement on nutrient intake and milk production of dairy cows in spring and summer

WJ Wales, PT Doyle, CR Stockdale, D Dellow

Journal article  |  1999  |  Australian Journal of Experimental Agriculture

Two experiments examining the effects of herbage mass and herbage allowance on the consumption of nutrients by lactating dairy cow..

A comparison of growth rates and carcass quality of steers receiving maize silage as a supplement to annual pasture or as a component of a feedlot ration

WJ Wales, JB Moran, RW Harris

Journal article  |  1998  |  Australian Journal of Experimental Agriculture

Summary. We tested the hypothesis that liveweight gain per hectare could be doubled in beef steers grazing irrigated annual pastur..

Dry matter intake and nutrient selection by lactating cows grazing irrigated pastures at different pasture allowances in summer and autumn

WJ Wales, PT Doyle, DW Dellow

Journal article  |  1998  |  Australian Journal of Experimental Agriculture

Summary. Three experiments investigating the effects of herbage allowance on the consumption of nutrients by lactating cows were c..

THE FEEDING VALUE OF CEREAL STRAWS FOR SHEEP .1. WHEAT STRAWS

WJ WALES, PT DOYLE, GR PEARCE

Journal article  |  1990  |  Animal Feed Science and Technology