@conference {40906,
	title = {Methane emission from grazing sheep and cattle},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {57},
	year = {1997},
	month = {Jan},
	pages = {130-133},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Measurements of methane emissions from individual sheep and dairy cows grazing typical New Zealand perennial ryegrass/white clover dominant pastures are reported. These are the first measurements reported from grazing sheep, and among the first from grazing cattle. The measurement technique, using a marker gas (sulphur hexafluoride), enables emission rates to be determined from analyses of "breath" samples collected while grazing. More than 250 measurements of daily methane emission from 50 sheep (8 months old) were made, with flock-mean emission 18.9{\textpm}0.8 g/d. Emissions were weakly correlated with feed intake, and they represented a 4.6{\textpm}0.1\% average loss of gross dietary energy. The corresponding mean emission based on 40 measurements of daily emissions from 10 lactating dairy cows was 263{\textpm}10 g/d, approximately 6.2\% of estimated gross energy intake. A notable feature was the large inter-sheep variability in daily methane emission (range 140\%) that could not be attributed to variable intake. This would appear to suggest an appreciable diversity of methanogenic response to digestion, and may be significant in the search for strategies to control emissions of this greenhouse gas. },
	issn = {1176-5283},
	author = {Ulyatt MJ and Lassey KR and Martin RJ and Walker CF and Shelton ID}
}
@conference {40384,
	title = {The nutritive value of Lotus for sheep},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {52},
	year = {1992},
	month = {Jan},
	pages = {89-92},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {A large-scale screening operation over two seasons by Landcorp  Farming Ltd has established a terminal sire-breeding programme for  sheep. Within the North and South Islands, screened hoggets were  transferred to Huirimu Station and Kepler Station respectively. In  1989, 2,046 ewe hoggets (0.8\%) were screened on liveweight from 248,500  animals in 114 flocks. Mean pooled population weight (adjusted to 18  December) was 43.2 },
	issn = {1176-5283},
	author = {Waghorn GC and Shelton ID}
}
@conference {40045,
	title = {Nutritive value of Lotus corniculatus L. containing low and medium concentrations of condensed tannins for sheep},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {47},
	year = {1987},
	month = {Jan},
	pages = {25-30},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {A linear programming model has been developed which allows investigation of alternative dairy production systems. Simulation models used in conjunction with the linear programming model were then used to help set performance standards for on farm animal productivity. Information from these model sources is seen as an aid to decision making on farms and as an opportunity for managers to better understand the basic relationships that apply within their farming system.},
	issn = {1176-5283},
	author = {Waghorn GC and John A and Jones WT and Shelton ID}
}
@conference {39689,
	title = {Factors influencing nitrogen flow from the rumen},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {40},
	year = {1980},
	month = {Jan},
	pages = {226},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	issn = {1176-5283},
	author = {John A and Ulyatt MJ and Jones WT and Shelton ID}
}
