TROPICAL PASTURES GUIDE

GETTING THE BEST RESULTS

SEED QUALITY - Beware of poor quality seed. Cheaper seed of poor purity and low germination is of little value and greater risk.

Example:

Buffel A @ $6/kg
Vs
Buffel B @ $5.50/kg
45% Germ 97% Purity
30% Germ 90% Purity

Buffel A is 33% better value and far less risk than Buffel B
Note: Heritage seeds bare and coated seeds are of high quality.

SEED TREATMENT - Where appropriate, use Heritage AgriCOTE treated seed to improve the likelihood of establishing a successful pasture. AgriCOTE pasture seed has a range of benefits.

SEEDBED - Evaluate which seedbed preparation is best for your soil type and planned pasture. Small seeded varieties generally benefit from a fine tilt seedbed. Heavier clay soils that crust benefit from a deeper rougher working.

APPLICATION METHOD - Aerial and ground seeding techniques both give good results, choose a sowing method suited for your circumstances. Even seed distribution at a consistent sowing depth gives best results.

TIMING - Avoid sowing when the seasonal risk of frost, drought or heat is likely to cause mortality of establishing seedlings. Order your seed early, timely seed-bed preparation is essential to ensure planting at the ideal sowing window.

FIRST GRAZING - Ideally, newly sown pasture should be well fenced and lightly grazed in the first season, allowing for some annual seed set. Fires should be avoided until the pasture is well established. Do not overgraze, and rotate new paddocks where possible.

WEED CONTROL - Should weeds begin to dominate an establishing pasture, it may be necessary to spray with a selective herbicide. Always seek expert advice on herbicide usage.

FERTILITY - Soil testing is a very helpful decision making tool enabling better planning of your pastures fertiliser requirements.

TROPICAL GRASSES - Available as bare seed or as AgriCOTE

BUFFEL GRASS (USA, Gayndah, Biloela, Nunbank)

Buffel - is the most widely planted sub-tropical grass in central and northern Australia. It is a hardy, palatable, very productive grass that responds quickly to moisture and fertility. It is suited to fertile loam soil types such as Brigalow and Gidgee country.

USA Buffel - is a shorter variety with fine stems, dense foliage with earlier purple flowering, suited to lighter textured, well-drained soils.

Gayndah Buffel - is a finer, medium height buffel that establishes readily, and is adapted to a wider range of soil types in central and western Queensland. It has better stock acceptance and is more densely tillered, but is less vigorous than Biloela.

Biloela Buffel - is a taller more robust buffel with a deep root system, greater drought tolerance with more vigorous underground rhizomes. It establishes readily in heavy soil types and is preferred for heavy-suckering country for its ability to produce a hotter fire.

RHODES GRASS (Callide, Katambora, Finecut)

Callide Rhodes Grass - is grown extensively in the coastal regions of northern NSW and Queensland. It grows in a wide range of soil types and is highly suited to companion legumes such as stylos, siratro and glycine. Its late flowering and good palatability make it ideal for quality grazing and/or hay making. Self-anchoring runners (stolons) ensure good establishment however it may not persist in very low fertility soils.

Katambora Rhodes Grass - displays greater drought tolerance and the ability to grow well on lower fertility soils such as speargrass country. It has a higher degree of stolons (runners) and withstands periodic waterlogging, making it a useful variety in heavy melonhole country where it competes aggressively with weeds (e.g. Parthenium in central Queensland).

Finecut Rhodes Grass - is a breeding selection from Katambora Rhodes for finer stems, better suited to quality hay making.

UROCHLOA (Sabi Grass)

A hardy perennial tropical grass able to persist and spread in the dry tropics. Its earliness to flower and hay off can restrict its productive potential. Urochloa responds quickly to rainfall and grows over a range of soil types.

INDIAN BLUE GRASS

Another hardy perennial tropical grass that is readily established over large areas if the dry topics. It has a developed root system suited to a range of soil types from sands to open "Downs" clays. Its productive potential is not great, however its drought tolerance, durability and soil conservation properties make it a valuable pasture in drought years.

PANIC GRASS (Bambatsi, Green, Gatton)

Bambatsi Panic - is a palatable and very drought tolerant grass with a deep fibrous root system. It does best on heavy black clays where it will tolerate periodic flooding. It can remain green and productive through winter with adequate rainfall.

Green Panic - is better suited to sub-tropical areas with fertile, well-drained soils. It also has good shade tolerance.

Gatton Panic - is similar to green panic but has broader longer leaves and better palatability.

SETARIA GRASS (Splenda, Kazungula, Narok, Solander)

Whilst varietal differences exist, setaria grass is adapted to varying soil types of the tropical coast where rainfall exceeds 800mm. Setaria is relatively frost tolerant and withstands some waterlogging. It is a good companion grass with legumes such as pinto, siratro and glycine.

Splenda Setaria - is bred by CSIRO for higher yield, forage quality, and later maturity. It is suited to longer growing season regions with good fertility. Splenda produces fine, leafy tillers with better palatability and feed value.

PURPLE PIDGEON GRASS

Purple Pidgeon Grass - is a tufted summer perennial grass that will grow on a range of soil types including heavy clays. It is suited to higher rainfall areas of central and southern Queensland and Northwest NSW. Purple Pidgeon Grass combines well with medics and Lucerne and is tolerant of temporary waterlogging.

CREEPING BLUE GRASS (Bisset, Hatch)

Creeping Blue Grass - has good drought and close grazing tolerance. It produces creeping stolons (runners) and is suited to low fertility soils having the ability to invade speargrass stands. The new cultivar Bissett is finer stemmed, more stoloniferous and is later maturing, as well as making better hay than Hatch.

JARRA GRASS

Jarra Grass - is a seed producing Pangola-type grass best suited for the fertile, wet tropics. It has the ability to grow proliferously under ideal seasonal growing conditions.

SIGNAL GRASS (Brachi)

Signal Grass - is a coarse stoloniferous grass that forms a dense ground cover under fertile conditions. It is suited to the humid tropical regions with rainfall above 1200mm. Signal Grass can be combined with aggressive tropical legumes such as stylos, glycine and siratro.

HUMIDICOLA (Tully Grass)

Humidicola - is a highly stoloniferous perennial grass with the ability to withstand prolonged waterlogging. It will establish in low fertility soils and responds well to fertiliser and withstands heavy grazing.

GUINEA GRASS (Hamil Grass)

Guinea (Hamil) Grass - is suited to warm, frost-free regions. It has a deep fibrous root system to survive drought but prefers well-drained fertile soils and high rainfall.

LEGUMES - Available as bare seed or as AgriCOTE

STYLOS (Seca, Siran, Amiga, Verano, Unica, Primar)

Stylos - are proven highly productive, high feed value legumes that persist and spread in the extended hot-dry climates of tropical and sub-tropical Australia. Their persistence and ease of establishment in the lighter, poorer soils of central Queensland and northern Australia has ensured Stylos are the legume of first choice for these regions.

SIRAN

Siran Stylo - is a shrubby Seca-type Stylo that was selected for its greater resistance to the fungal disease anthracnose. Like Seca Stylo, Siran has good drought tolerance and persistence but has better disease resistance and yield potential. Siran should be included with all Seca sowing to prolong the stand life.

AMIGA

Highly palatable and productive Verano-type Stylo bred for drier and cooler environments. Amiga will establish and spread readily in the higher, drier areas of central and northern Queensland where Verano has proven marginal. It is ideal in a mix with Siran and Seca Stylos and /or improved tropical grasses. Amiga also produces good quality hay.

UNICA/PRIMAR

Unica and Primar - are scabra-type Stylos introduced for their adaptation to heavier soil types. They have the disadvantage of being innoculant specific and as such, should be inoculated and sown into a wet seedbed to ensure nitrogen fixation. Unica is suited to central Queensland while Primar is better suited to the cooler areas in southern Queensland.

MEDICS (Barrel, Snail, Strand)

Medics - are temperate annual legumes that combine well with tropical grasses in the cooler southern regions of Queensland and northern NSW. Medics should be sown into a fallowed seedbed in April-May. They are self-regenerating and favour rotational grazing to allow seed set.

WYNN CASSIA

A hardy, heavy seeding bi-annual legume adapted to well drained soils from northern NSW through to the top of Australia. Wynn Cassia grows well on sandy acid soils of low fertility and is non-bloating. Wynn Cassia has the advantage of greater frost tolerance but is much lower in protein than other legumes such as Stylos.

SIRATRO (Aztec)

A deep-rooted vine type perennial legume suited to sub-tropical to tropical climates with a rainfall about 750mm. Siratro grows in a wide range of soil types and makes an excellent companion legume competing well with grasses and has good palatability. The cultivar Aztec has the advantage of greater rust resistance.

GLYCINE (Tinaroo, Cooper)

Twining perennial legume suited to well drained, heavier, more fertile soils in cooler elevated regions. Glycine does not grow well on lighter, less fertile soil types.

MILGARRA BUTTERFLY PEA

High protein perennial suited to medium to heavy clay soils of reasonable fertility and rainfall (>700mm). Milgarra shows good drought and grazing tolerance, performing best in a spell grazing system that allows seed set. It has high digestibility and protein making it excellent for hay production.

AMARILLO FORAGE PEANUT

Amarillo Forage Peanut - is a highly productive and digestible forage legume that grows in the elevated higher rainfall areas of northern NSW and Queensland (>1000mm), such as the Atherton Tablelands. Amarillo makes an ideal companion legume for tropical grasses such as Splenda Setaria and Brachi. Amarillo is also useful for a shaded ground cover in orchards. Seed should be inoculated.

SHAW CREEPING VIGNA

Shaw Creeping Vigna - is a climbing and/or prostrate perennial legume. It is adapted to warm moist regions and has little drought or frost tolerance. It requires good rainfall (>1200mm) with soils of good moisture holding capacity. Due to its growth habit, it makes an excellent companion legume for tropical grasses like Kikuyu and Splenda Setaria and tolerates intensive rotational grazing.

AGRICOTE SEED OPTION

Thousands of hectares of northern Australian pastoral country have been established utilising AgriCOTE seed. It allows graziers flexible, easier and cost effective pasture establishment over a varied range of conditions. AgriCOTE seed is not a guarantee of pasture establishment, nor is it the best option for all situations. It does however, offer graziers sowing options and advantages over bare seed and a chance for better pasture establishment.

VARIETY
MIN RAIN MM
PREFERRED SOIL
WATERLOGGING TOLERANCE
FROST RESISTANCE
DROUGHT TOLERANCE
SOWING RATE BARE SEED
kg/ha
SOWING RATE AGRICOTE
kg/ha
COMMENTS
Bambatsi Panic
500
Clay loams to heavy black soil
Good
Good
Very Good
2 - 4
3 - 8
Cool season greenness, tolerates heavy grazing and periodic waterlogging, salt tolerant
Buffel - American, Gayndah, Biloela
300
Prefers light to medium texture soils, however, Biloela tolerates heavier soil types
Poor
Poor to Fair
Very Good
1 - 4
2 - 8
Most widely planted sub-tropical grass in northern Aus, hardy, fertility loving, productive
Creeping Blue Grass - Bisset, Hatch
600
Wide ranging, tolerates lower fertility
Poor
Fair
Fair
1 - 4
2 - 8
A hardy useful grass. Will invade speargrass and establish on clays. Bisset is finer leafed and roots down more strongly than Hatch. Good for erosion control
Green panic - Gatton panic
650
Fertile and lighter texture soil types
Poor
Fair
Fair
2 - 6
3 - 12
Grows best on high fertility soils, tolerates shade, highly palatable and can be grazed out
Signal grass - Brachi
1000
Varying
Fair
Poor
Good
2 - 4
Valuable grass in the wet tropics when nitrogen fertilised
Humidicola Tully grass
1000
Varying, tolerates lower fertility
Good
Poor
Fair
2 - 4
Adapted to wetter, lower situations than decumbens but shorter growing season
Indian blue grass
500
Varying
Poor
Poor
Very Good
1 - 4
2 - 8
A hardy, free seeding plant. Spreading widely throughout NQ & CQ. Good for erosion control
Jarra grass
650
Varying
Fair
Poor
Good
1 - 4
2 - 8
Good forage grass and for erosion control. Suited to the dry and wet tropics
Kikuyu - Whittet
1000
Red loams and basaltic soils
Fair
Good
Fair
1 - 4
1.5 - 8
Does best in cool moist, elevated, fertile basaltic tablelands. Has high fertility requirements
Premier Digitaria
650
Lighter soil types
Poor
Fair
Fair
1 - 4
1.5 - 8
Perennial tufted grass suited to acidic, sandy soils of low fertility
Purple pidgeon grass
600
Self mulching clays
Good
Poor
Very Good
2 - 4
4 - 8
Medium term perennial. Suited self mulching clays
Rhodes grass - Callide, Katambora, Pioneer
650
A wider range of light to medium soils types
Fair
Fair
Fair, Pioneer & Katambora better
1 - 4
2 - 12
Callide: Productive, palatable grass, suited to fertile soils. Katambora: Productive, more stoloniferous grass, suited for erosion control.
Pioneer: Hardy grass, more frost tolerant suited to northern NSW.
Fine Cut: Fine leaf selection from Katambora.
General: Moderate salt tolerance, quick to establish.
Setaria - Splenda
800
Varying
Very Good
Poor
Fair
2 - 4
4 - 8
Hardy, palatable, coastal grass suited to sub-tropical regions
Urochloa - Sabi grass
500
Varying
Poor
Poor
Good
1 - 4
2 - 8
Useful in the tropics. Needs some fertility of companion legume
Forager forage sorghum
500
Requires a fully cultivated seedbed
Poor
Fair
Good
7 - 25
Highly productive annual crop for forage grazing, hay and greenchop. Low prussic acid
Silk sorghum
500
Fertile clays and clay loams
Poor
Fair
Good
1 - 10
Annual forage crop for grazing
Sceptre Lucerne (temperate)
300
Slightly acid to alkaline soil types of varying texture
Poor
Very Good
Very Good
10 - 20 irrig
1 - 5 dry
Same
Very high winter growth, very broad pathogen resistance, persistent
Medic - Barrel, snail, strand
400
Varying
Poor
Very Good
Good
5 - 10
Same
Barrel-better suited to permanent pastures, Strand-better on sandier soil types. Snail-best suited to undersowing with winter cereals
Guinea - Hamil grass
1000
Deep fertile soils
poor
Poor
Fair
3 - 6
4 - 10
Important wet tropics grass which has strong regrowth, requires good soil fertility
Siratro - Aztec
750
Varying
Fair
Fair
Good
2 - 4
3 - 8
Widely adapted twining legume. Do not overgraze, combines well with tropical grasses
Desmanthus
600
Neutral to alkaline loams and clay
Fair
Fair
Good
2 - 4
3 - 8
A shrubby perennial legume suited to heavy clay soils, compatible with grasses under grazing
Milgarra Butterfly Pea
650
Medium to heavy textured soils
Poor
Fair
Good
4 - 8
Vigorous, twinning, summer growing legume suited to a range of soils (loams to clay) in northern Aus and central Qld. Useful legume in ley and permanent pastures
Wynn Cassia
750
Varying
Poor
Poor
Good
2 - 4
3 - 8
Hardy, widely adapted self regenerating annual that is suited to acidic sand to loam soil types. Tolerates set stocking well
Stylo - Siran, Seca, Amiga, Verano
450
Well drained sand to loam soil types, tolerates poor soil fertility
Poor
Poor
Very Good
2 - 6
3 - 10
Siran: Seca type with extra anthracnose protection.
Seca: Hardy, perennial shrubby legume. Widely adapted.
Amiga: Verano type adapted to cool dry regions, suited to NQ & CQ
Verano: Short-lived herbaceous perennial, suited to northern Aus
Stylo mixes - Top, Mega
450
Well drained sand to loam soil types, tolerates poor fertility
Poor
Poor
Very Good
2 - 6
3 - 10
Top stylo mix: Mix 50% Seca & 50% Siran
Mega stylo mix: Mix 20% Amiga & 40% Siran & 40% Seca

© Steve Cselka 2002 - 2010