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Technical annual report 2000-01



Technical annual report 2000-01


Dept. of Regional Development, Primary Industry, Fisheries and Resources technical annual report; Department of Regional Development, Primary Industry, Fisheries and Resources technical and annual report; Reports; PublicationNT; Technical bulletin (Northern Territory. Dept. of Primary Industry and Fisheries) ; no. 295




Made available via the Publications (Legal Deposit) Act 2004 (NT).






Agriculture -- Northern Territory -- Periodicals; Fisheries -- Northern Territory -- Periodicals

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Dept. of Primary Industry and Fisheries

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Technical bulletin (Northern Territory. Dept. of Primary Industry and Fisheries) ; no. 295



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Department of Primary Industry and Fisheries 44 extend over at least one more growing season (2001-2002) to look at the effect of soil adsorption on plant uptake as well as the other factors (pH, moisture content, nutrient status, etc) that are likely to influence bioaccumulation. A background to the study and more detailed results are available at Berrimah Agricultural Research Centre in an ANSTO report number REPP-TR-01.DPIF file number 99/0365. *ANSTO: Australian Nuclear Science and Technology Organisation PROJECT: Weed Management Strategy Demonstration Site Project Officers: N. Hill, P. Shotton, B. Lemcke, and DDRF staff Location: Douglas Daly Research Farm Objective: To demonstrate a 'best bet' pasture rehabilitation/weed management strategy on a badly weed infested Cavalcade paddock The area had been established as a cavalcade pasture for a number of years prior to the start of this project. It had become infested with weeds resulting in poor productivity. This project aimed to demonstrate a strategic weed management plan involving a five-year crop/pasture rotation. This will evaluate the increase in productivity of the pasture each year, and ultimately enable the area to be re-sown to Cavalcade. The total paddock area is approx 6 ha. Method: 1995/96 The area was under cavalcade with large amounts of weeds, particularly sida senna and hyptis. 1996/97 The area was cultivated, sown to Jumbo sorghum, atrazine pre- and post- emergent applied; fertiliser applied (200 kg/ha of 0-18-0-10) and eventually harvested in early April. No nitrogen fertiliser was required. Yields of 12 t/ha of hay were achieved. 1997/98 The area was cultivated and sown to sabi (6 kg/ha of hulled seed) in mid-January, and fertiliser applied @ 37 kg/ha Pasture Gold 0-14-0-17 + trace. Sabi established well. Broadleaf weeds also emerged, so the area was sprayed with Diuron at 41/ha in mid March. 1998/99 Cattle were introduced on 17 June 1998 (5 head-1head/ha) and grazed continuously except for a two-week period in January (6-20) when the pasture was fertilised with 100 kg Pasture Gold 0-14-0-17 and sprayed with 2 L/ha Diuron and 2 L/ha 2,4D Amine (to control broadleaf weeds). On 28/1/99 two extra steers were put in Bay 11 (both at 234 kg, raising the stock numbers to 7 head/ 5 ha). 1999/2000 Cattle were replaced on 10 August 1999 with five weaner heifers, which were continuously grazed on the paddock through to 30/6/00 except when destocked for spraying. Cattle weights were recorded every two months. Cattle received ad lib access to Wet and Dry season supplement blocks. A group of 30 bulls was used to crash graze the paddock in January 2000 whilst heifers were removed prior to spraying with 2 L each of Diuron and 24D on 8/2/00. Heifers were brought back to the paddock on 17/2/2000. They continued in the paddock until November 2000, when they were removed for cultivation. The paddock was pasture surveyed using Botanal in May 1997 (after harvest), November 1997 (to monitor emerging weeds with the start of the Wet), February 1998 (to record sabi establishment and weeds