D. Clark

发表

Issues and options for future dairy farming in New Zealand

R. Monaghan, B. Thorrold, D. Clark, 2007 .

A urine patch framework to simulate nitrogen leaching on New Zealand dairy farms

P. Beukes, A. Romera, D. Clark, 2012, Nutrient Cycling in Agroecosystems.

The relationship between milk production and farm-gate nitrogen surplus for the Waikato region, New Zealand.

P. Gregorini, P. Beukes, A. Romera, 2012, Journal of environmental management.

Influence of fertiliser and grazing management on North Island moist hill country 2. Pasture botanical composition

M. G. Lambert, D. Clark, D. Costall, 1986 .

Effect on milk characteristics to supplementing cows on a restricted pasture allowance with different amounts of either turnips or sorghum.

D. Clark, N. Thomson, C. Waugh, 2000 .

Feeding value of pastures for ruminants

D. Clark, G. Waghorn, 2004, New Zealand veterinary journal.

Pasture growth model to assist management on dairy farms: Testing the concept with farmers

C. Clark, P. Beukes, A. Romera, 2013 .

Some effects of feeding pasture silage as a supplement to pasture on reproductive performance in lactating dairy cows.

S. McDougall, D. Clark, K. Macmillan, 1995, New Zealand veterinary journal.

Influence of fertiliser and grazing management on North Island moist hill country

M. G. Lambert, D. Clark, D. Costall, 1983 .

A nutrient-transfer model to explain the fate of phosphorus and sulphur in a Grazed Hill-Country pasture

S. Saggar, M. Hedley, A. Mackay, 1990 .

The potential of diverse pastures to reduce nitrogen leaching on New Zealand dairy farms

P. Gregorini, R. Bryant, D. Chapman, 2014 .

Evaluating the benefits of standing cows off pasture to avoid soil pugging damage in two dairy farming regions of New Zealand

D. Horne, R. Monaghan, M. Hedley, 2013 .

Influence of fertiliser and grazing management on North Island moist hill country 4. Pasture species abundance

M. G. Lambert, D. Clark, D. Costall, 1986 .

Advances in pasture management for animal productivity and health

A. Litherland, D. Clark, MG Lambert, 2004, New Zealand veterinary journal.

Nitrogen losses from grazed dairy pasture, as affected by nitrogen fertiliser application

S. Ledgard, D. Clark, M. Sprosen, 1996 .

Do forage legumes have a role in modern dairy farming systems

D. Woodfield, D. Clark, 2009 .

Birdsfoot trefoil - an alternative legume for New Zealand dairy pastures

D. Clark, S. Harris, P. Laboyrie, 1998 .

A urine patch framework to simulate nitrogen leaching on New Zealand dairy farms

P. Beukes, A. Romera, D. Clark, 2012, Nutrient Cycling in Agroecosystems.

Inter-annual variability in pasture herbage accumulation in temperate dairy regions: causes, consequences, and management tools.

D. Chapman, B. Cullen, D. Clark, 2013 .

Leaf and tiller growth of Lolium perenne and Agrostis spp. and leaf appearance rates of Trifolium repens in set-stocked and rotationally grazed hill pastures

D. Chapman, D. Clark, C. Land, 1983 .

A comparison of perennial ryegrass- and tall fescue-based swards with or without a cropping component for dairy production: Animal production, herbage characteristics and financial performance from a 3-year farmlet trial

D. Chapman, C. Clark, C. Roach, 2018 .

Effects of perennial ryegrass infected with either AR1 or wild endophyte on dairy production in the Waikato

E. Thom, D. Clark, K. Macdonald, 2005 .

Effects of a novel ryegrass endophyte on pasture production, dairy cow milk production and calf liveweight gain

E. Thom, D. Clark, C. Waugh, 2005 .

Effect of high rates of nitrogen fertiliser on perennial ryegrass growth and morphology in grazed dairy pasture in northern New Zealand

E. Thom, D. Clark, S. Harris, 1996 .

Milksolids production from cows grazing perennial ryegrass containing AR 1 or wild endophyte

E. Thom, D. Clark, K. Macdonald, 2022 .

Ryegrass endophyte, cow health and milksolids production for the 1993/94 season

E. Thom, D. Clark, C. Waugh, 1994 .

Production and profit of current and future dairy systems using differing nitrogen leaching mitigation methods: the Pastoral 21 experience in Waikato

M. Shepherd, C. Roach, M. Neal, 2020, New Zealand Journal of Agricultural Research.

Supplementing lactating dairy cows fed high-quality pasture with black wattle (Acacia mearnsii) tannin.

C. Clark, D. Clark, W. Griffiths, 2013, Animal : an international journal of animal bioscience.

Greenhouse gas mitigation opportunities with immediate application to pastoral grazing for ruminants

D. Clark, G. Waghorn, 2006 .

Sawdust and bark to treat nitrogen and faecal bacteria in winter stand‐off pads on a dairy farm

N. Bolan, S. Ledgard, Jiafa Luo, 2008 .

Inconsistencies in rumen methane production—effects of forage composition and animal genotype

D. Clark, S. L. Woodward, M. Tavendale, 2006 .

Optimized dairy grazing systems in the northeast United States and New Zealand. I. Model description and evaluation.

D. Mccall, D. Clark, J. Penno, 1999, Journal of dairy science.

Impact of monensin on methane production and performance of cows fed forage diets

D. Clark, S. L. Woodward, G. Waghorn, 2005 .

Advancing dairy farming profitability through research

D. Clark, J. Caradus, 2001 .

High production dairy-beef cattle grazing systems : a review of research in the

M. G. Lambert, D. Clark, G. Cosgrove, 2003 .

White clover or nitrogen fertiliser for dairying ?

D. Clark, S. Harris, 2001 .

Effects of white clover content in the diet on herbage intake, milk production and milk composition of New Zealand dairy cows housed indoors

D. Clark, M. Auldist, S. Harris, 1998, Journal of Dairy Research.

Effect of high rates of nitrogen fertiliser on white clover growth, morphology, and nitrogen fixation activity in grazed dairy pasture in northern New Zealand

D. Clark, S. Harris, 1996 .

Defoliation of Lolium perenne and Agrostis spp. tillers, and Trifolium repens stolons in set-stocked and rotationally grazed hill pastures

D. Chapman, D. Clark, C. Land, 1984 .

Herbage production from perennial ryegrass and tall fescue pastures under irrigation in the Canterbury and Waikato regions of New Zealand.

D. Clark, T. Knight, J. B. Vlaming, 2010 .

Forage crop sequences for pastoral systems in northern New Zealand.

E. Minnee, J. Ruiter, D. Clark, 2009 .

More feed for New Zealand dairy systems

C. Matthew, D. Clark, J. Crush, 2001 .

Effect of using a stand‐off pad on Campylobacter jejuni strain diversity in a herd of dairy cows

D. Clark, A. Donnison, C. Ross, 2008, Letters in applied microbiology.

Milking cows once daily influences behavior and udder firmness at peak and mid lactation.

C. Tucker, D. Clark, D. Dalley, 2007, Journal of dairy science.

Milking frequency affects the circadian body temperature rhythm in dairy cows

P. E. Kendall, J. Webster, C. Tucker, 2008 .

Yields and persistency of lactation in Friesian and Jersey cows milked once daily.

N. López-Villalobos, D. Clark, D. Dalley, 2006, Journal of dairy science.

A systems comparison of once- versus twice-daily milking of pastured dairy cows.

D. Clark, D. Dalley, C. Phyn, 2006, Journal of dairy science.

Once-a-day milking : possible and profitable ?

D. Clark, C. Cooper, M. J. Tong, 2002 .

Escherichia coli shedding by dairy cows

D. Clark, A. Donnison, C. Ross, 2008 .

Influence of fertiliser and grazing management on North Island moist hill country 5. Animal production

D. Clark, D. Grant, M. Grant, 1986 .

Pasture species and drought impact on milk yield 1. Milk yield responses in the Waikato

E. Thom, D. Clark, C. Waugh, 1998 .

Chicory for milk production

E. Thom, P. Copeman, D. Clark, 1998 .

Liveweight gain and intake of Friesian bulls grazing 'Grasslands Puna' chicory (Cichorium intybus L.) or pasture.

D. Clark, C. Anderson, G. Hongwen, 1990 .

Herbage production from five grazable forages

E. Minnee, C. Clark, D. Clark, 2013 .

Growth, persistence, and alkaloid levels of endophyte‐infected and endophyte‐free ryegrass pastures grazed by dairy cows in northern New Zealand

E. Thom, D. Clark, C. Waugh, 1999 .

The impact of farming without nitrogen fertiliser for ten years on pasture yield and composition , milksolids production and profitability ; a research farmlet comparison

C. Roach, J. M. Lee, D. Clark, 2013 .

Inter-paddock annual dry matter yield variability for dairy farms in the Waikato region of New Zealand

D. Clark, Karunia F Macdonald, Cef Clark, 2010 .

Original paper: Use of a pasture growth model to estimate herbage mass at a paddock scale and assist management on dairy farms

Cameron E. F. Clark, Pierre C. Beukes, D. A. Clark, 2010 .

Predicting accurate paddock-average pasture cover in Waikato dairy farms using satellite images

E. Minnee, G. Mata, D. Clark, 2007 .

Effects of pasture species and irrigation on milk production over four summers in the Waikato

E. Thom, D. Clark, C. Waugh, 2001 .

Growth rates of ‘Grasslands Puna’ chicory (Cichorium intybus L.) at various cutting intervals and heights and rates of nitrogen

D. Clark, C. Anderson, T. Berquist, 1990 .

Long term effects of withholding phosphate application on North Island hill country: Ballantrae

D. A. Clark, A. Mackay, M. G. Lambert, 1990 .

Productivity, changes and resilience in New Zealand grassland agriculture over the last three decades

H. Clark, D. Clark, G. Rys, 2021, NZGA: Research and Practice Series.

PASTURE COMPOSITION UNDER MIXED SHEEP AND GOAT GRAZING ON HILL COUNTRY

P. Budding, M. G. Lambert, D. Clark, 1984 .

Effects of fertiliser application on nutrient status and organic matter content of hill soils

A. Mackay, M. G. Lambert, D. Clark, 2000 .

Influence of fertiliser and grazing management on North Island moist hill country 3. Performance of introduced and resident legumes

M. G. Lambert, D. Clark, D. Costall, 1986 .

Composition of the diet of sheep grazing swards of differing white clover content and spatial distribution

D. Clark, P. Harris, 1985 .

Methane emissions by dairy cows fed increasing proportions of white clover ( Trifolium repens ) in pasture

J. M. Lee, D. Clark, S. L. Woodward, 2004 .

Systems to increase grazeable forage production in the Waikato: a progress report on the tall fescue and perennial ryegrass component of these systems.

C. Clark, C. Roach, D. Woodfield, 2010 .

Effects of Ryegrass Endophyte and Different White Clover Levels in Pasture on Milk Production from Dairy Cows

E. Thom, D. Clark, R. Mccabe, 1997 .

Nitrogen fertiliser effects on white clover in dairy pastures

D. Clark, S. Harris, C. Waugh, 2001 .

Leaf and tiller or stolon death of Lolium perenne, Agrostis spp., and Trifolium repens in set-stocked and rotationally grazed hill pastures

D. Chapman, D. Clark, C. Land, 1984 .

Resource Efficient Dairying trial : measurement criteria for farm systems over a range of resource use

D. Clark, K. Macdonald, R. Jensen, 2005 .

EFFECT OF PASTURE RESERVES AND STOCKING RATE ON EWE AND LAMB PERFORMANCE FROM MID-PREGNANCY TO WEANING

D. Clark, 1977 .

Long term effects of witholding phosphate application on North Island hill country.

S. Ledgard, M. G. Lambert, D. Clark, 1990 .

Nitrogen inputs and losses from New Zealand dairy farmlets, as affected by nitrogen fertilizer application: year one

S. Ledgard, D. Clark, M. Sprosen, 1996, Plant and Soil.

Farming within limits - can system fundamentals be the key?

Pierre C. Beukes, A. J. Romera, D. A. Clark, 2013 .

Understanding Motivations to Adopt Once-a-day Milking amongst New Zealand Dairy Farmers

D. Bewsell, D. Bewsell, D. Clark, 2008 .

Effects of season, stocking rate, and grazing duration on diet selected by hoggets grazing mixed grass-clover pastures

D. Clark, B. Watkin, M. Guy, 1981 .

Herbage accumulation rates and tiller demography of North Island hill country pastures

D. Clark, C. Anderson, G. Hongwen, 1990 .

Turnips for summer milk production

D. Clark, J. Penno, N. Thomson, 1995 .

Popular summary

Wheeler, K. Mcaneney, M. Judd, 2008 .

Effects of reduced frequency of milk removal on gene expression in the bovine mammary gland.

R. Snell, S. Davis, R. Spelman, 2010, Physiological genomics.

Effects of reduced frequency of milk removal on gene expression in the bovine mammary gland.

R. Snell, S. Davis, R. Spelman, 2010, Physiological genomics.