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PastoralPastoral PastoralPastoral© State of Western Australia, 2008. MEMOMEMO Northern Pastoral Region PO Box 19, Kununurra WA 6743 Phone: (08) 9166 4019 Email: [email protected] September 2008 ISSN 1033-5757 Vol. 29, No. 3 CONTENTS Welcome from the editor ........................................................................................................................ 3 Northern Rangelands Calendar ............................................................................................................... 3 Rangeland exclosures in the West Kimberley ........................................................................................ 4 Celebrating Bob McCartney’s long career with the department ............................................................... 5 Prominent visitors for Lamboo Station .................................................................................................... 6 Low-stress stock handling course at Roebuck Plains ............................................................................. 7 Exotic bird alert in Pilbara ...................................................................................................................... 8 EcoFire—Strategic community fire management for the Kimberley......................................................... 9 Parkinsonia seeds don’t last as long as we think! ................................................................................. 11 Have you seen these plants? ............................................................................................................... 12 Hay isn’t hay ........................................................................................................................................ 13 Pregnancy testing of cattle in WA ........................................................................................................ 14 NT heifer research on commercial properties—Newry field day, August 2008........................................ 16 Sending stock to Midland Saleyards? .................................................................................................. 18 Update on the Muchea livestock centre ................................................................................................ 19 Northern Rangelands Pastoral Memo is available online ....................................................................... 19 Swill feeding is still illegal ..................................................................................................................... 20 NLIS compliance in the Rangelands ..................................................................................................... 20 New biosecurity officer in Karratha ....................................................................................................... 21 Bush nurse: Gout—what is it? ............................................................................................................. 22 PGA Kimberley Division—Annual General Meeting ............................................................................... 23 PGA Annual Bull and Commercial Heifer Sale ......................................................................................23 Cattle Market Update—22 September 2008 ......................................................................................... 24 EDITOR: Matthew Fletcher Visit http://www.agric.wa.gov.au PASTORAL MEMO – NORTHERN PASTORAL REGION SEPTEMBER 2008 RANGELAND EXCLOSURES IN THE WEST KIMBERLEY [See page 4 for the full story.] Photo taken inside exclosure #1 on station in Fitzroy Valley Photo taken outside exclosure #1 on station in Fitzroy Valley Front page photo courtesy of Don Hadden, Mt Barnett 2 http://www.agric.wa.gov.au PASTORAL MEMO – NORTHERN PASTORAL REGION SEPTEMBER 2008 WELCOME FROM THE EDITOR After a busy August for everyone in the rangelands we zero in on an exotic bird sighted in the Pilbara, discuss the dormancy of Parkinsonia seed—and reveal the identities of two prominent visitors to Lamboo Station in July! The feature article is ‘Rangeland exclosures in the West Kimberley’ written by Bob McCartney, who recently celebrated 30 years of service to the Department of Agriculture and Food in Derby. Bob is well equipped to discuss the history of rangeland exclosures built between 1968 and 1977 and supplemented in the 1980s. He has included some great photos from inside and outside an exclosure in the Fitzroy Valley. The impact of continued heavy grazing is evident outside the exclosure where pasture condition is nowhere near as good. Inside, ground cover has increased significantly and it will not be long before the desirable perennial grasses come back into the system, if they haven’t already. I know what side of the fence I would rather be on if I had to raise a calf every year! An article originally published in the Esperance AgMemo entitled ‘Hay isn’t hay’ helps anyone who buys hay to make an informed decision on the quality of the hay they are buying. Whether feeding bulls for a rodeo, holding cattle in the yards or substitute feeding out in the paddock, this article will help you make an informed decision on the quality of hay you need to buy. Useful rain fell in the Pilbara in late June. Karratha (25 mm), Pardoo (47 mm), Hillside (85 mm) and Bonney Downs (77 mm) all had good falls. Rainfall produced much-needed pasture/herb growth and will help these areas through to the 2008–09 wet season. Falls in the Kimberley were generally not as heavy. However, Moola Bulla (41 mm) and Drysdale River (25 mm) had good falls in June. Happy reading Matthew Fletcher EVENT LOCATION DATE CONTACT SEPTEMBER Dog baiting – Pilbara Marble Bar 1st Neville McInerney – 9173 1609 Robe River Rodeo Pannawonica 5th & 6th Kerri Renton – 0439 028 369 Pilbara Music Festival Port Hedland TBA Sandy Harris – 9158 9368 Perth Royal Show Perth 27th –4th Oct. Kununurra Bushman's Night Rodeo Kununurra 27th Joe & Catherine Atkins – 9167 8823 Conference – Australian Rangelands Charters Towers, 29th – 2nd Oct. Janine King – (07) 5547 0774 Society Qld OCTOBER Kimberley ZCA Meeting Broome 23rd Noel Wilson – 9166 4000 PGA Meeting – Kimberley Broome-Mangrove 24th Jim Motter (Chairman) – 9191 7141 Hotel Kununurra Apex Barra Bash Skull Rock 27th Mark Furini – 9168 3222 Clean up the Kimberley Kimberley 26th – 28th www.cleanup.org.au/kimberley Pilbara ZCA Meeting TBC 31st Richard Watkins – 9143 7000 NOVEMBER 2008 Desert Knowledge Symposium Alice Springs 3rd – 6th http://www.desertknowledge2008.com PLEASE EMAIL [email protected] WITH DATES OF EVENTS HAPPENING IN YOUR LOCAL AREA http://www.agric.wa.gov.au 3 PASTORAL MEMO – NORTHERN PASTORAL REGION SEPTEMBER 2008 RANGELAND EXCLOSURES IN THE WEST KIMBERLEY Bob McCartney Between 1968 and 1977, seventeen exclosures were built in the west Kimberley to provide a benchmark for measuring the impact of livestock on the rangelands over the long term. The exclosures also help pastoralists and researchers to understand the regenerative capacity of degraded rangelands. From Luluigui and Napier Downs in the west to Cherrabun and Christmas Creek stations in the east, the exclosures included most of the important land system and pasture types in the west Kimberley. Each 4 ha exclosure was sited at least 5 km from water and fenced to exclude domestic and large feral animals with netting being used where wallabies were a problem. Data was collected from each exclosure between 1968 to 1985 and showed that plant basal area increased and bare ground decreased between 1977 and 1982 over most but not all exclosures. Exclosures on less degraded areas had responded to stock exclusion. On some, such as Gogo No. 1, the recovery was impressive. In severely degraded areas there was no response as too much top soil had already been removed and soil structure had deteriorated. Mechanical intervention would be required before improvement could occur in these areas. Regeneration exclosures Spelling was not sufficient to allow regeneration on several degraded areas so mechanical methods were used to promote regeneration. In the early 1980s a regeneration team erected 14 more exclosures to protect the regeneration areas from stock. Work was carried out on Meda, Yeeda, Mt Anderson, Myroodah, Nerrima, Quanbun, Gogo, Brooking Springs and Cherrabun stations. Ponding, cultivation by ripping, introduced species and mulch trials were tested. Some sites responded well but others failed to improve due to an exposed sodic layer (through loss of topsoil), soil slumping and cultivation that lasted only a season. Other exclosures have shown some regeneration and should be maintained so that they continue to provide useful information. The future Will these exclosures have a use in the future? If so, they will need to be maintained. The inside story Collection of frequency data from each exclosure was a complex process. A transect is a fixed line along which measurements are made. There were five transects inside and five outside each exclosure. Each transect was five chains long (about 100 m) and recordings were made every five links, giving 100 recordings per transect. 4 http://www.agric.wa.gov.au PASTORAL MEMO – NORTHERN PASTORAL REGION SEPTEMBER 2008 A surveyor’s tape was stretched between two fixed pickets and a turnbuckle was used to tighten the steel tape. The tape was marked at intervals with brass inserts. Measurements were made using the Parker Loop method. The parker loop was a three-quarter inch diameter loop on a one-eighth inch diameter