Land Unit Master

Land Unit Information Sheet

Land system name: Potosi

Land unit: PT1

General description This undulating plain has a patchy distribution of vegetation, where dominance and the proportion of species vary according to changes in soil type and depth to an underlying ironstone hardpan. Most common are the brown Chromosols (texture-contrast profiles) with a hardpan at approximately 0.25m - slightly deeper profiles have a more robust vegetation. Sandy Tenosols (uniform-textured profiles), also with an ironstone hardpan at approx 0.5m, occur to a limited extent and tend to have a vegetation of bloodwood, wattle and spinifex. Mid-high, open woodlands of Eucalyptus whitei (White's ironbark) and Corymbia dallachiana (ghost gum) dominate the upper strata with C. terminalis (desert bloodwood) a common occurrence. In the mid-strata Acacia tenuissima (narrow- leaved wattle), Melaleuca nervosa (woodland paperbark) and Carissa lanceolata (currant bush) dominate a wide range of shrub species. The ground cover is predominantly Triodia pungens (gummy spinifex). Regional ecosystem 10.7.10 is predominant.

Site characteristics Landform element Average slope Plain 1% Site drainage Soil permeability Imperfectly drained Slowly permeable Flooding risk Inundation risk Nil Nil Potential recharge to groundwater Soil depth Low Shallow; 0.25 - <0.5 m Present land use Grazing

Susceptibility to land degradation processes

Sheet erosion Gully erosion Wind erosion Salting High Very low Low Very low

This information has been generated from the Desert Uplands Land Resource Database. The Environmental Protection Agency accepts no liability for any decisions or actions taken on the basis of this information. State of Queensland. Environmental Protection Agency 2004.

7/12/2005 Land Unit PT1 - page 1 Representative site number: 1107

Soil classification Australian Soil Classification Principle Profile Form CH AB EA CD - A F L O U Dy2.51 - 3/0/005

General soil description A thin, slightly gravelly, sandy loam topsoil overlying a yellowish brown clay with an ironstone hardpan within 0.5m of the surface

Soil profile morphology

Horizon Horizon no Depth Description A 1 0.00 - 0.05 Dark brown sandy loam; No mottles; very few small pebbles subangular Ironstone coarse fragments; Massive; no segregations; Dry weak; Abrupt to; B2t 2 0.05 - 0.47 Strong brown sandy clay; No mottles; common small pebbles subangular Ironstone coarse fragments; Massive; no segregations; Dry weak; D 3 0.47 - 2.00+ Strongly cemented continuous massive ferricrete pan

Soil chemical analysis P S H A D P h a G N o O S o i l H S l o u s m s r D r t u o t r o l s p i

a m a t g a z c t e d p a a r p v e r s k a o o p i i t i H t i e h r z s n c t e i n u n n t s n e o l o i i h i n i s

u t t i u r g c % n n r o e y t m m u

o n n s . t

A 1 0.00 - 0.05 6.9 0.97 Deficient Deficient High - Nil - Very low Low N Y Nil B2t 2 0.05 - 0.47 7.2 14.54 Deficient Deficient Moderate - Nil - Very low Very low N Y Nil

Field sites within this land unit (see technical report for original site nos.) Site code Site type 1098 DUSLARA Tertiary 1099 DUSLARA Tertiary 1100 DUSLARA Tertiary 1101 DUSLARA Tertiary 1102 DUSLARA Primary 1103 DUSLARA Tertiary 1104 DUSLARA Tertiary 1105 DUSLARA Tertiary 1107 DUSLARA Primary 1253 DUSLARA Tertiary 1254 DUSLARA Tertiary 1258 DUSLARA Primary 1259 DUSLARA Tertiary 1260 DUSLARA Tertiary 4497 Corveg 4656 Corveg 4660 Corveg

7/12/2005 Land Unit PT1 - page 2 Summary of plant species within this land unit

Species Common name Acacia adsurgens wattle Acacia aneura mulga* Acacia coriacea desert oak, wirewood, dogwood, wiry wattle Acacia cowleana (Acacia oligophleba) Cowley's wattle*, sand wattle Acacia elachantha wattle Acacia excelsa ironwood*, brigalow, bunkerman, ironwood wattle Acacia farnesiana (1,5) mimosa bush*, cassie, cassie flower, mimosa, needlebush, north-west curara, prickly mimosa, prickly mimosa bush, prickly moses, sheep's briar, sponge wattle, sweet acacia, thorny acacia Acacia holosericea soap bush wattle, candelabra wattle Acacia laccata wattle Acacia longispicata wattle, black wattle, curracabah Acacia melleodora waxy wattle Acacia tenuissima narrow-leaved wattle Acacia victoriae gundabluie*, prickly wattle*, bramble wattle, elegant acacia, elegant wattle Aristida calycina var. calycina dark wiregrass Aristida contorta bunched kerosene grass*, kerosene grass, mulga grass, sand speargrass, sand wiregrass, silver grass, windgrass Aristida holathera erect kerosene grass, wiregrass, kerosene grass, large silver grass, tall kerosene grass Aristida inaequiglumis unequal threeawn, feathertop threeawn, wiregrass Aristida sp. three-awn speargrass*, wiregrass Bothriochloa sp. - Bulbostylis barbata dainty sedge Canthium attenuatum myrtle Carissa lanceolata currant bush*, conkerberry, Australian carissa, boonum bush, burrum bush, conkleberry Cassytha filiformis dodder laurel*, dodder, love vine Chamaesyce drummondii caustic-weed*, caustic creeper, creeping spurge, flat spurge, mat spurge, spurgewort Chloris sp. - Corymbia dallachiana ghost gum Corymbia setosa (Eucalyptus setosa) rough-leaved bloodwood*, desert bloodwood, rough-leaf bloodwood, applejack, hairy gum Corymbia sp. bloodwood Corymbia terminalis (Eucalyptus western bloodwood*, desert bloodwood*, inland bloodwood, bloodwood, terminalis) kulcha, long-fruited bloodwood, pale bloodwood Cymbopogon obtectus silkyheads*, lemon scentgrass, woolly-headed grass Digitaria brownii cotton panic*, cotton panic grass, woolly finger, cotton grass, silver spike grass Dysphania rhadinostachya green crumbweed Dysphania sp. - Enneapogon polyphyllus leafy nineawn*, limestone bottlewashers, oatgrass Enneapogon sp. bottlewashers* Eragrostis sp. lovegrass Eremophila longifolia berrigan*, emubush, long-leaf eremophila, dogwood, emu apple, berrigan emubush, weeping emu bush Eremophila mitchellii sandalbox*, bastard sandalwood*, budda, false sandalwood, sandalwood

7/12/2005 Land Unit PT1 - page 3 Species Common name Eriachne aristidea threeawn grass*, three-awn wanderrie, three-awn wanderrie grass, broad- leaf wanderrie grass Eriachne mucronata mountain wanderrie grass*, rock grass Eriachne sp. - Eucalyptus whitei White's ironbark* Goodenia armitiana - Goodenia cycloptera fan flower* Gossypium australe native cotton Grevillea parallela silver oak Grevillea striata beefwood* Hakea lorea corkbark, bootlace, corkwood, witinti, bootlace oak Indigofera linifolia native indigo, narrow-leaf indigo Maytenus cunninghamii yellow berry bush* Melaleuca nervosa paperbark teatree, woodland paperbark, fibrebark Melaleuca tamariscina - Melaleuca uncinata broom honey-myrtle*, broombush, black broom, broom honey myrtle, dyurr, mallee broombush, yangarra, youngie bush, tea-tree Oldenlandia mitrasacmoides - Panicum effusum hairy panic*, branched panic, diffuse panic, effuse panic, poison panic, two-colour panic Pluchea rubelliflora - Polycarpaea corymbosa Polygala isingii Portulaca oleracea pigweed*, common pigweed, common purslane, munyeroo, neverdie, perennial pigweed, portulaca weed, purslane, red pigweed, purselane Pterocaulon redolens ragweed Schizachyrium fragile firegrass*, red spathe grass, small redleaf Sclerolaena sp. copperburr Senna artemisioides butter bush*, desert cassia*, silver cassia*, silver desert cassia* Sida fibulifera pin sida, silver sida Solanum cleistogamum - Solanum ferocissimum native tomato Sporobolus australasicus Australian dropseed*, fairy grass Sporobolus sp. - Themeda triandra kangaroo grass*, red oatgrass Triodia pungens soft spinifex, gummy spinifex, spinifex Tripogon loliiformis five minute grass*, eight-day grass, rye beettle grass Wahlenbergia communis tufted bluebell*, native bluebell Zornia muriculata zornia*

1. Introduced plant 2. Consider for protection 3. Pending registration 4. Rare plant 5. Environmental weed 6. Endangered plant 7. Vulnerable plant 8. Agricultural pest * Wildnet preferred common name; Species in brackets refer to previously known name

Special features Implications for land use

7/12/2005 Land Unit PT1 - page 4 Special features Implications for land use The diversity of brightly-coloured flowering plants is quite The shallow soils, and the corresponding low water storage high; Acacias (10 species), Grevilleas (2 species), capacity, place severe limitations on productivity and Melaleucas (1 species) and Hakeas (1 species) have diversification into alternative land uses. been recorded. The soils have a very low nutrient status and are deficient in The wide range of native flowering plants identify this phosphorus and potassium. area as an important habitat and source of food for many The ground cover has a low productivity and is vulnerable to pollen and nectar-seeking insects, birds and animals. overgrazing. If degraded, it is difficult to regenerate. This land unit is included in Land Management Unit 1.

7/12/2005 Land Unit PT1 - page 5