References
- Bryce , SW , Izquierdo , A and Lugue de Castro , MD . 1995 . Speciation of inorganic selenium using flow injection hydride generation atomic fluorescence spectrometry . Journal of Analytical Atomic Spectrometry , 10 : 1059 – 1063 .
- Clarke , DA . Silage for milk production . Proceedings of the Ruakura Farmers Conference . Vol. 45 , pp. 41 – 46 .
- Clarke , RG , Sargison , ND , West , DM and Littlejohn , RP . 1998 . Recent information on iodine deficiency in New Zealand sheep flocks . New Zealand Veterinary Journal , 46 : 216 – 222 .
- Corson , DC , Waghorn , GC , Ulyatt , MJ and Lee , J . 1999 . NIRS: forage analysis and livestock feeding . Proceedings of the New Zealand Grassland Association , 61 : 127 – 132 .
- Crush , JR and Caradus , JR . 1995 . Cyanogenesis potential and iodine concentration in white clover (Trifolium repens L.) cultivars . New Zealand Journal of Agricultural Research , 38 : 309 – 316 .
- Ellison , RS . 1995 . “ Trace elements in deer ” . In Proceedings of a Deer Course for Veterinarians 12 , 57 – 68 . Deer Branch of the New Zealand Veterinary Association .
- Fraser , MD , Fychan , R and Jones , R . 2003 . Evaluation of methods for storing small quantities of experimental silage . Small Ruminant Research , 54 : 141 – 146 .
- Genstat Committee . 2005 . Genstat for Windows. , 8th ed. , Harpenden, , UK : Rothamsted Experimental Station, Lawes Agricultural Trust .
- Grace , ND . 1992 . Prevention of trace element deficiencies in grazing ruminants: an evaluation of methods . Proceedings of the New Zealand Grassland Association , 54 : 31 – 34 .
- Grace , ND . 1994 . Managing trace element deficiencies , 70 Palmerston North, , New Zealand : AgResearch .
- Grace , ND , Lee , J , Mills , RA and Death , AF . 1997 . Influence of Se status on milk Se concentrations in dairy cows . New Zealand Journal of Agricultural Research , 40 : 75 – 78 .
- Grace , ND , Knowles , SO , Rounce , JR , West , DM and Lee , J . 1998 . Effect of increasing pasture copper concentrations on the copper status of grazing Romney sheep . New Zealand Journal of Agricultural Research , 41 : 377 – 386 .
- Grace , ND , Craighead , M and Watt , B . 2000 . The macro‐ and micro‐element content of swedes and kale in Southland, New Zealand, and the effect of trace element‐amended fertilisers on their Co, Se and Cu concentrations . New Zealand Journal of Agricultural Research , 43 : 533 – 540 .
- Grace , ND , Knowles , SO and Sinclair , GR . 2001 . Effect of premating iodine supplementation of ewes fed pasture or a brassica crop prelambing on the incidence of goitre in newborn lambs . Proceedings of the New Zealand Society of Animal Production , 61 : 164 – 167 .
- Grace , ND , Wilson , PR and Nicol , AM . The copper nutrition of grazing deer. Deer nutrition symposium: the nutrition and management of deer on grazing systems . Proceedings of a New Zealand Grassland Association Symposium . 8–9 November . pp. 113 – 119 . Lincoln University . 2002
- Grace , ND , Knowles , SO , West , DM and Lee , J . 2004 . Copper oxide needles administered during pregnancy improve the copper status of ewes and their lambs . New Zealand Veterinary Journal , 52 (4) : 189 – 192 .
- Hawke , MF , O'Connor , MB , Johnston , TJM , Waller , JE and Addison , B . 1994 . Monitoring cobalt status—experiences in the central North Island . Proceedings of the New Zealand Grassland Association , 56 : 249 – 254 .
- Heanes , DL . 1981 . Determination of trace elements in plant material by a dry ashing procedure . Analyst , 106 : 172 – 181 .
- Howse , SW , Isherwood , P , Miller , DB , Wells , JL , Riddick , CM , Thomson , NA and Clarke , DA . 1996 . Pasture silage in New Zealand—targets and current practice . Proceedings of the New Zealand Grassland Association , 56 : 157 – 160 .
- Litherland , AJ , Korte , CJ , Dowling , A , Smith , D , Moffat , C , Lee , J and Lambert , MG . 1999 . Liver copper concentration in cattle and herbage copper, sulphur, iron and molybdenum concentrations on commercial farms in the Wairoa region . Proceedings of the New Zealand Grassland Association , 61 : 75 – 78 .
- Longhurst , RD , Hawke , MF and O'Connor , MB . 1997 . Trace element status on sheep‐beef farms in the Raglan‐Franklin districts . Proceedings of the New Zealand Grassland Association , 59 : 17 – 21 .
- Martinie , GD and Schilt , AA . 1976 . Investigation of the wet oxidation efficiencies of perchloric acid mixtures for various organic substances and the identities of residual matter . Analytical Chemistry , 48 (1) : 70 – 74 .
- Metherell , AK . 1989 . The Cobalt enigma—some observations and strategies for Otago and Southland . Proceedings of the New Zealand Grassland Association , 50 : 101 – 108 .
- Moller , SN , Parker , WJ and Edwards , NJ . 1996 . Within year variation in pasture quality has implications for dairy cow nutrition . Proceedings of the New Zealand Society of Animal Production , 57 : 173 – 177 .
- Morton , JD , Grace , ND and O'Connor , MB . 1999 . Use of trace elements in New Zealand pastoral farming , Newmarket, Auckland : New Zealand Fertiliser Manufacturers’ Research Association .
- Moxon , R and Dixon , E . 1980 . Method for the determination of iodine in food . Analyst , 105 : 344 – 352 .
- Mulvaney , C . 1997 . The role of iodine in Merino sheep. Is there a subclinical condition affecting lamb survival? . Proceedings of the Sheep and Beef Cattle Society , 27 : 117 – 124 .
- O'Kiely , P , Flynn , AV , Poole , DBR and Rogers , PAM . 1989 . Sulphuric acid as a silage preservative. 3. Added copper, silage composition, animal performance and copper status . Irish Journal of Agricultural Research , 28 : 25 – 33 .
- Penno , JW , Bryant , AM , MacDonald , KA and Carter , WA . 1996 . Enhancing pasture‐based dairying with supplementary feeds . Proceedings of the New Zealand Grassland Association , 58 : 113 – 118 .
- Quirk , MF and Norton , BW . 1987 . The relationship between cobalt nutrition of ewes and the vitamin B12 status of ewes and lambs . Australian Journal of Agricultural Research , 38 : 1071 – 1082 .
- Reid , TC and Shannon , PW . 1987 . An effect of copper supplementation on growth of beef cattle in Northland . Proceedings of the New Zealand Society of Animal Production , 47 : 123 – 124 .
- Rooke , JA , Robinson , JJ and Arthur , JR . 2004 . Effects of vitamin E and selenium on the performance and immune status of ewes and lambs . Journal of Agricultural Science , 142 : 253 – 262 .
- Samanta , AK , Singh , KK , Verma , NC , Misra , AK and Das , MM . 2003 . Silage quality of different forages ensiled in plastic bags . Range Management and Agroforestry , 24 : 42 – 44 .
- Sargison , ND and West , DM . 1998 . Iodine deficiency: an emerging problem in New Zealand sheep flocks . Proceedings of the New Zealand Society of Animal Production , 25 : 202 – 204 .
- Sargison , ND , West , DM and Clark , RG . 1997 . An investigation of the possible effects of subclinical iodine deficiency on ewe fertility and prenatal lamb mortality . New Zealand Veterinary Journal , 45 : 208 – 211 .
- Sargison , ND , West , DM and Clarke , RG . 1998 . The effects of iodine deficiency on ewe fertility and perinatal lamb mortality . New Zealand Veterinary Journal , 46 : 72 – 75 .
- Smith , LC , Morton , JD and Catto , WD . 1999 . The application of iodine to pasture and its effects on herbage concentrations and animal blood levels . New Zealand Journal of Agricultural Research , 42 : 433 – 440 .
- Smith , LC , Hawke , MF , Morton , JD and Catto , WD . 2006 . The effectiveness of copper fertiliser in maintaining the copper status of deer at moderate to high pasture molybdenum content . New Zealand Journal of Agricultural Research , 49 : 45 – 54 .
- Ulyatt , MJ , Fennessy , PF , Rattray , PV and Jagush , KT . 1980 . “ The nutritive value of supplements ” . In Supplementary feeding: a guide to the feeding of supplements for sheep and cattle in New Zealand , Edited by: Drew , KF and Fennessy , PF . 157 – 184 . New Zealand Society of Animal Production Occasional Publication 7 .
- Webby , RW , Johnstone , LCJ and Sherlock , R . 2001 . Reducing the impact of adverse summer‐autumn pasture conditions on livestock performance: results from farmer experience . Proceedings of the New Zealand Grassland Association , 63 : 229 – 233 .
- Watkinson , JH . 1983 . Prevention of selenium deficiency in grazing animals by annual topdressing of pasture with sodium selenate . New Zealand Veterinary Journal , 31 : 78 – 85 .
- West , DM and Sargison , ND . 1998 . Copper supplementation of grazing cattle using pasture topdressing and individual animal treatment . Proceedings of the New Zealand Grassland Association , 60 : 229 – 232 .
- Woodward , SL , Chaves , AV , Waghorn , GC and Laboyrie , PG . 2002 . Supplementing pasturefed dairy cows with pasture silage, maize silage, lotus silage or sulla silage in summer—does it increase production? . Proceedings of the New Zealand Grassland Association , 64 : 85 – 89 .