Photo of Dave Roberts

Dave Roberts

Prof

  • Crichton Estate, SAC Consulting, Heston House

    DG1 4TA Dumfries

    United Kingdom

19942019
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Research Output 1994 2019

2019
dairy farming
land use
biodiversity
feed rations
crops
4 Citations (Scopus)
3 Downloads (Pure)

What agricultural practices are most likely to deliver "sustainable intensification" in the UK?

Dicks, LV., Rose, DC., Ang, F., Aston, S., Birch, ANE., Boatman, N., Bowles, EL., Chadwick, D., Dinsdale, A., Durham, S., Elliott, J., Firbank, L., Humphreys, S., Jarvis, P., Jones, D., Kindred, D., Knight, SM., Lee, MRF., Leifert, C., Lobley, M. & 20 others, Matthews, K., Midmer, A., Moore, M., Morris, C., Mortimer, S., Murray, TC., Norman, K., Ramsden, S., Roberts, DJ., Smith, LG., Soffe, R., Stoate, C., Taylor, B., Tinker, D., Topliff, M., Wallace, J., Williams, P., Wilson, P., Winter, M. & Sutherland, WJ., Feb 2019, In : Food and Energy Security. 8, 1, e00148.

Research output: Contribution to journalArticle

Open Access
File
farms
sustainable agricultural intensification
business organization
farming systems
business planning
2018
2 Citations (Scopus)
1 Downloads (Pure)
Open Access
File
cattle feeding
total mixed rations
methane production
dairy cattle
milk yield

Environmental and economic trade-offs of milk production systems

March, MD., Alexander, P. & Roberts, DJ., May 2018.

Research output: Contribution to conferenceAbstract

1 Downloads (Pure)
Open Access
File
data analysis
farms
terminology
consultants
agricultural industry
2017
3 Downloads (Pure)

A time-series of methane and carbon dioxide production from dairy cows during a period of dietary transition

Lee, MA., Todd, A., Sutton, MA., Chagunda, MGG., Roberts, DJ. & Rees, RM., 30 Sep 2017, In : Cogent Environmental Science. 3, 1385693.

Research output: Contribution to journalArticle

Open Access
File
methane
time series analysis
dairy cows
carbon dioxide
greenhouse gases
1 Downloads (Pure)

Financial evaluation of Holstein Friesian strains within composite and housed UK dairy systems

March, MD., Shalloo, L., Roberts, DJ. & Ryan, W., 28 Mar 2017, In : Livestock Science. 200, p. 14 - 22 9 p.

Research output: Contribution to journalArticle

Open Access
File
genetic merit
dairies
Holstein
profitability
milk prices
2016
10 Citations (Scopus)

Modelling phosphorus efficiency within diverse dairy farming systems - pollutant and non-renewable resource?

March, MD., Toma, L., Stott, AW. & Roberts, DJ., 1 Jun 2016, In : Ecological Indicators. 69, p. 667 - 676 10 p.

Research output: Contribution to journalArticle

Open Access
File
nonrenewable resources
dairy farming
farming systems
pollutants
phosphorus
2015

Are by-product feed systems appropriate for high producing dairy cows?

March, MD., Chagunda, MGG., Flockhart, JF. & Roberts, DJ., Aug 2015, p. 264. 1 p.

Research output: Contribution to conferenceAbstract

Novel dairy systems as an adaptation to diminishing phosphate resources

March, MD., Roberts, DJ., Stott, AW. & Toma, L., Aug 2015.

Research output: Contribution to conferenceAbstract

The relationship between water intake and oestrus behaviour in dairy cows

Barrenho, G., Chagunda, MGG., March, MD. & Roberts, DJ., Apr 2015, p. 154. 1 p.

Research output: Contribution to conferenceAbstract

2014
1 Citation (Scopus)

An innovative approach to integrated training for smallholder dairying

Chagunda, MGG., Munthali, DP., Gondwe, TN., Wood, B. & Roberts, DJ., 2014, In : Journal of Agricultural Education and Extension. 20, 4, p. 413 - 428 16 p.

Research output: Contribution to journalArticle

Malawi
milk production
animal breeding
farmers
food security
21 Citations (Scopus)
1 Downloads (Pure)

Current trends in British dairy management regimens

March, MD., Haskell, MJ., Chagunda, MGG., Langford, FM. & Roberts, DJ., 2014, In : Journal of Dairy Science. 97, 12, p. 7985 - 7994 10 p.

Research output: Contribution to journalArticle

Open Access
File
dairies
farmers
farms
summer
herd size
4 Citations (Scopus)
Open Access
File
life cycle assessment
greenhouse gases
economics
farms
greenhouse gas emissions
2013
16 Citations (Scopus)

Environmental efficiency of alternative dairy systems: a productive efficiency approach

Toma, L., March, MD., Stott, AW. & Roberts, DJ., 2013, In : Journal of Dairy Science. 96, 11, p. 7014 - 7031 18 p.

Research output: Contribution to journalArticle

dairies
genetic merit
genotype-environment interaction
greenhouse gas emissions
surpluses
19 Citations (Scopus)

Measurement of enteric methane from ruminants using a hand-held laser methane detector

Chagunda, MGG., Ross, DW., Rooke, JA., Yan, T., Douglas, J., Poret, L., McEwen, NR., Teeranavattanakul, P. & Roberts, DJ., 2013, In : Acta Agriculturae Scandinavica, Section A - Animal Science. 63, 2, p. 68 - 75 8 p.

Research output: Contribution to journalArticle

methane
detectors
lasers
ruminants
hands

Precision agriculture and its use in dairy systems

Chagunda, MGG., Ross, DW., Roberts, DJ. & Martins, CE. (ed.), 2013, Alternativas para Producao Sustentavel do Leite na Amazonia. Martins, CE. (ed.). Brasilia, Brazil: Embrapa, p. 167 - 184 18 p.

Research output: Chapter in Book/Report/Conference proceedingChapter

7 Citations (Scopus)
microclimate
dairy cattle
cows
weather
humidity
2012
21 Citations (Scopus)
Open Access
gestation period
calves
dystocia
cattle
social environment
11 Citations (Scopus)

Dairy cow feeding space requirements assessed in a Y-maze choice test

Rioja-Lang, FC., Roberts, DJ., Healy, SD., Lawrence, AB. & Haskell, MJ., 2012, In : Journal of Dairy Science. 95, 7, p. 3954 - 3960 7 p.

Research output: Contribution to journalArticle

cow feeding
dairy cows
cows
palatability
testing

Predisposing factors for involuntary culling in Holstein-Friesian dairy cows

Chiumia, D., Chagunda, MGG., MacRae, AI. & Roberts, DJ., 2012, In : Journal of Dairy Research. 80, 1, p. 45 - 50 6 p.

Research output: Contribution to journalArticle

culling (animals)
Holstein
dairy cows
cows
odds ratio
22 Citations (Scopus)

Status of dairy cow management and fertility in smallholder farms in Malawi

Banda, LJ., Kamwanja, LA., Chagunda, MGG., Ashworth, CJ. & Roberts, DJ., 2012, In : Tropical Animal Health and Production. 44, 4, p. 715 - 727 13 p.

Research output: Contribution to journalReview article

Open Access
small farms
Malawi
dairy cows
farmers
dairies

The perceived impact of climate change and variability on smallholder dairy production in northern Malawi

Kasulo, V., Chikagwa-Malunga, S., Chagunda, MGG. & Roberts, DJ., 2012, In : African Journal of Agriculture Research. 7(34), p. 4830 - 4837 8 p.

Research output: Contribution to journalArticle

Malawi
milk production
climate change
farmers
rain
2011
20 Citations (Scopus)

Smallholder dairy production in Northern Malawi: production practices and constraints

Tebug, SF., Kasulo, V., Chikagwa-Malunga, S., Wiedemann, S., Roberts, DJ. & Chagunda, MGG., 2011, In : Tropical Animal Health and Production. 44, 1, p. 55 - 62 8 p.

Research output: Contribution to journalArticle

Open Access
Malawi
milk production
farmers
dairy farming
herd size
2010
40 Citations (Scopus)

Are cows more likely to lie down the longer they stand?

Tolkamp, BJ., Haskell, MJ., Langford, FM., Roberts, DJ. & Morgan, CA., 2010, In : Applied Animal Behaviour Science. 124, p. 1 - 10 10 p.

Research output: Contribution to journalArticle

Risk factors for culling Holstein-Friesian dairy cows

Bell, M., Wall, E., Russell, G., Roberts, DJ. & Simm, G., 2010, In : Veterinary Record. 167, p. 238 - 240 3 p.

Research output: Contribution to journalArticle

culling (animals)
risk factors
Holstein
dairy cows
calving

Risk factors for culling in Holstein-Friesian dairy cows (Veterinary Record

Bell, M. J., Wall, E., Russell, G., Roberts, D. J. & Simm, G., 25 Sep 2010, In : Veterinary Record. 167, 13, p. 238-240

Research output: Contribution to journalArticle

8 Citations (Scopus)
2009

Comparison of two methods of assessing dairy cow body condition score

Bewley, JM., Boyce, RE., Roberts, DJ., Coffey, MP. & Schutz, MM., 2009, In : Journal of Dairy Research. 77, p. 95 - 98 4 p.

Research output: Contribution to journalArticle

19 Citations (Scopus)

Dairy cows trade-off feed quality with proximity to a dominant individual in Y-maze choice tests

Rioja-Lang, FC., Roberts, DJ., Healy, SD., Lawrence, AB. & Haskell, MJ., 2009, In : Applied Animal Behaviour Science. 117, p. 159 - 164 6 p.

Research output: Contribution to journalArticle

42 Citations (Scopus)

Effect of genotype and feeding regime on enteric methane, non-milk nitrogen and performance of dairy cows during the winter feeding period

Chagunda, MGG., Romer, DAM. & Roberts, DJ., 2009, In : Livestock Science. 122, 2-3, p. 323 - 332 10 p.

Research output: Contribution to journalArticle

methane
production technology
dairy cows
milk production
winter
40 Citations (Scopus)

On the use of a laser methane detector in dairy cows

Chagunda, MGG., Ross, DW. & Roberts, DJ., 2009, In : Computers and Electronics in Agriculture. 68, p. 157 - 160 4 p.

Research output: Contribution to journalArticle

2008
40 Citations (Scopus)

Cow body shape and automation of condition scoring

Halachmi, I., Polak, P., Roberts, DJ. & Klopcic, M., 2008, In : Journal of Dairy Science. 91, p. 4444 - 4451 8 p.

Research output: Contribution to journalArticle

62 Citations (Scopus)

Potential for estimation of body condition scores in dairy cattle from digital images

Bewley, JM., Peacock, AM., Lewis, O., Boyce, RE., Roberts, DJ., Coffey, MP., Kenyon, SJ. & Schutz, MM., 2008, In : Journal of Dairy Science. 91, p. 3439 - 3453 15 p.

Research output: Contribution to journalArticle

2007
9 Citations (Scopus)

Asssessment and improvement of the efficiency of nitrogen use on commercial dairy farms

Roberts, DJ., Leach, KA. & Goldie, J., 2007, In : International Journal of Agricultural Sustainability. 5, p. 295 - 304 10 p.

Research output: Contribution to journalArticle

21 Citations (Scopus)

Effect of twinning on the feed intake, performance and health of dairy cows

Bell, MJ. & Roberts, DJ., 2007, In : Livestock Science. 107, p. 274 - 281 8 p.

Research output: Contribution to journalArticle

The impact of uterine infection on a dairy cow's performance

Bell, M. & Roberts, DJ., 2007, In : Theriogenology. 68, p. 1074 - 1079 6 p.

Research output: Contribution to journalArticle

2002
11 Citations (Scopus)

The value of malt distillers' grains ensiled with molassed sugar beet pellets as a feed for dairy cows

McKendrick, EJ., Roberts, DJ. & Offer, NW., 2002, In : Grass and Forage Science.

Research output: Contribution to journalArticle

1999
10 Citations (Scopus)

The effects of incorporating sugar beet pulp with forage maize at ensiling on silage fermentation and effluent output using drum silos

Hameleers, A., Leach, KA., Offer, NW. & Roberts, DJ., 1999, In : Grass and Forage Science. 54, p. 322 - 335 14 p.

Research output: Contribution to journalArticle

1997
11 Citations (Scopus)

The effect of protein source on lameness and solear lesion formation in dairy cattle

Offer, JE., Logue, DN. & Roberts, DJ., 1997, In : Animal Science. 65, p. 143 - 149 7 p.

Research output: Contribution to journalArticle

10 Citations (Scopus)
1995
5 Citations (Scopus)

The manipulation of grass swards for summer calving cows

Fisher, GEJ., Roberts, DJ. & Dowdeswell, AM., 1995, In : Grass and Forage Science. 50, p. 424 - 438 15 p.

Research output: Contribution to journalArticle

1994

Effects of feeding fodder beet and concentrates with different protein contents on dairy cows offered grass silage ad libitum

Fisher, GEJ., Sabri, MS. & Roberts, DJ., 1994, In : Grass and Forage Science. 49, p. 34 - 41 8 p.

Research output: Contribution to journalArticle