@conference {40172,
	title = {Effects of selection for shear strength on structure and rumen digestion of perennial ryegrass},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {49},
	year = {1989},
	month = {Jan},
	pages = {225-228},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Lamb production from May or August lambing by Merino and Comeback ewes was compared from 1982 to 1985 in a factorial design experiment at Hamilton, Western Victoria. Groups of 50 ewes were stocked at 500 kg live weight/ha or 12.4 Merinos/ha and 10.8 Comebacks/ha. Natural fertility levels were similar for all treatments with an average of 5\% ewes not lambing. Comeback ewes had a higher lambing rate (lambs born/ewes joined) at August compared with May lambing (1.28 v 1.19 sed 0.052) whereas the Merinos had similar lambing rates (1.03 v 1.07 sed 0.02), indicating that the Western Victorian Merinos were relatively insensitive to seasonal effects (photoperiod) on fecundity. Lamb mortality was higher at August compared with May lambing (18.5 v 14.5\% sed 1.8\%) and was associated with higher chill factors in August due to cooler, wetter weather. The effects of lamb mortality lead to similar weaning rates (lambs weaned/ewes joined) for Comebacks at May and August lambing and lower weaning rates for Merinos at August compared with May lambing. Lamb weaning weights were similar for both lambing times, except in 1985 when severe internal parasite infections before weaning in groups lambing in May restricted lamb growth. The lower stocking rate (ewes/ha) balanced the higher per head production for Comeback ewes and lead to no significant differences between breeds or lambing times in weight of lamb weaned per ha.},
	issn = {1176-5283},
	author = {John A and Inoue T and Brookes IM and Hunt WF and Easton HS}
}
@conference {40171,
	title = {Effects of selection for shear strength on the voluntary intake and digestion of perennial ryegrass fed to sheep},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {49},
	year = {1989},
	month = {Jan},
	pages = {221-224},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Mature Romney ewes were involved in three experiments at Flock House Agricultural Centre and Limestone Downs (near Raglan) to identify factors affecting the percentage of ewes pregnant to mating in November and December following treatment with CIDRs and PMSG. Dorset rams were no better than Romney rams for mating and increasing the ram percentage from 10\% to 15\% failed to overcome the low conception rate of 50-65\%. Rams that had been used for mating 11 days previously increased the percentage of ewes pregnant. Ewes previously lambing in autumn had only a 4.8\% increase in ewes mated and pregnant compared with ewes previously lambing in spring. Despite the reuse of CIDRs reducing the percentage of ewes mated by 6.1\% it was still economical to reuse CIDRs. There was a consistent increase in ewes pregnant and multiple pregnancies with increasing dose of PMSG. By contrast live weight had no effect on the reproductive performance of ewes except for those ewes less than 40 kg live weight. Regulin implants failed to overcome the low conception rate of ewes mating following treatment with CIDRs and PMSG in December.},
	issn = {1176-5283},
	author = {Inoue T and Brookes IM and Barry TN and John A}
}
@conference {40126,
	title = {Physical breakdown of forages during rumination},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {48},
	year = {1988},
	month = {Jan},
	pages = {247-248},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {This study was carried out to examine the efficacy and safety of an injectable copper (Cu) preparation (Coprin; Cu-EDTA, Pittman-Moore Animal Health, NZ) in deer and sheep. Treatments consisted of an injection of Coprin at three dose rates on two occasions five weeks apart. Liver biopsy samples were taken one week before and one and four weeks after each injection and 22 weeks after the second injection. Approximately 75\% of the dose was present in the livers of sheep one week after each injection. However, while over 90\% of the dose was present in the livers of deer one week after the first injection, less than 65\% of the second injected dose was present after one week. Total plasma Cu was elevated for one week after the second injection only, the increase being proportional to dose rate. Plasma activities of aspartate transaminase, gamma-glutamyl transferase and sorbitol dehydrogenase were transiently elevated after the second injection, although not sufficiently so to indicate a state of toxicity. The product was found to be effective for rapidly increasing the Cu concentration of the liver in both sheep and deer. There appeared to be no significant ill-effects in either sheep or deer at twice the recommended dose for sheep.},
	issn = {1176-5283},
	author = {John A and Kelly KE and Sinclair BR and Reid CSW}
}
@conference {40042,
	title = {Importance of dry matter content to voluntary intake of fresh grass forages},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {47},
	year = {1987},
	month = {Jan},
	pages = {13-16},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {The data from 2 series of trials were used to examine the effects of variation in leaf, green and total allowance on the herbage intake and milk production of dairy cows and the liveweight gain of weaned lambs over late spring and summer. Both the herbage intake and milk production of dairy cows and the liveweight gain of lambs were better related to leaf allowance than to green or total herbage allowance. With lambs, however, there were differences in liveweight gain at similar leaf allowances between experimental periods. These were largely accounted for by the percentage of dead herbage in the pasture. It is suggested that differences in animal performance over late spring and summer may be influenced by the level of leaf mass and dead matter in pasture but not the level of green grass stem.},
	issn = {1176-5283},
	author = {John A and Ulyatt MJ}
}
@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}
}
