Izmir Subterranean Clover

Early flowering with hard seed for low rainfall

Trifolium subterraneum

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Izmir Subterranean Clover is seen as the direct replacement for Nungarin Subterranean Clover in areas receiving less than 375mm annual rainfall. It is early flowering (78 days) but has greater hard seededness than Nungarin, which should result in greater persistence in cropping rotations. Seed softening also occurs later in the summer–autumn period than Nungarin, giving it slightly greater protection from losses due to false breaks.

Key attributes

  • Early flowering with increased autumn, winter and spring production
  • Greater hard seededness than Nungarin
  • Later seed softening protects against false breaks
  • Prostrate habit gives good grazing tolerance
  • Low levels of formononetin
  • Increased persistence in cropping rotations

About this variety

Izmir is an early flowering subterranean clover for the low rainfall areas of WA. It is well adapted to moderately acid soils across the northern and eastern zones of the agricultural area.

Izmir has increased autumn, winter and spring production compared to Nungarin.

Limited testing suggests that Izmir has greater tolerance of acid soils than Nungarin. The overall field performance of Izmir has been superior to Nungarin.

Planting & grazing notes

Relatively prostrate growth habit gives good tolerance to grazing. Inoculate with group C inoculant before sowing.

Disease & pest resistance

Some resistance to clover scorch.

Stand life

Greater hard seededness than Nungarin should give greater persistence in cropping rotations; the advantage was apparent after seasons where trial sites were cropped or sprayed out to prevent seed set. Where this occurred, mean seedling density of Izmir was 34% higher and seed production was 74% higher than Nungarin.

How it's sold

FormPackStatus
Bare25 kgIn stock
Izmir Subterranean Clover

FAQs

What sub clover should I use to replace Nungarin in a low rainfall paddock?

We recommend Izmir Subterranean Clover. It is seen as the direct replacement for Nungarin Subterranean Clover in areas receiving less than 375mm rainfall. It flowers early like Nungarin but has more hard seed, giving better persistence in cropping rotations, and it produces more feed in autumn, winter and spring. It suits moderately acid soils and 350mm+ rainfall.

Which clover handles false breaks best in the northern wheatbelt?

Izmir Subterranean Clover gives a little more protection from false breaks than Nungarin Subterranean Clover, because its hard seed softens later in the summer–autumn period, so fewer seeds germinate on an early rain and then die. It is well adapted to moderately acid soils across the northern and eastern agricultural zones, from 350mm rainfall.

What legume regenerates well after a crop in a pasture-crop rotation?

Izmir Subterranean Clover has high hard seed levels, so it regenerates well after a cropping year. In trials on sites that had been cropped or sprayed out, Izmir had 34% higher seedling density and 74% higher seed production than Nungarin Subterranean Clover. It is an early-flowering sub clover suited to moderately acid soils in lower rainfall areas.

How much Izmir sub clover do I sow?

We recommend sowing Izmir Subterranean Clover at 10 to 15 kg/ha as a pure stand, or 6 to 10 kg/ha in a mix, inoculated with Group C inoculant before sowing. Izmir is an early-flowering sub clover for the low rainfall areas of WA, suited to 350mm+ rainfall on moderately acid soils with a minimum soil pH of 5 (CaCl2).

How much rain do I need for Izmir sub clover?

We recommend Izmir Subterranean Clover for areas with 350mm or more of annual rainfall. It is an early-flowering sub clover for the lower rainfall areas of WA and is seen as the direct replacement for Nungarin Subterranean Clover where rainfall is under 375mm. It needs a soil pH of 5 (CaCl2) or higher and suits moderately acid soils.

Is there a sub clover with low oestrogen that sheep can graze hard?

Yes, Izmir Subterranean Clover has low levels of formononetin and a low oestrogen level. Its relatively prostrate growth habit also gives it good tolerance to grazing. It suits lower rainfall (350mm+), moderately acid country, making it a good fit for sheep paddocks there.

What's an early flowering clover for a short growing season near Merredin or Kalannie?

We recommend Izmir Subterranean Clover for short-season country. It flowers early, at about 78 days, and is seen as the direct replacement for Nungarin Subterranean Clover below 375mm rainfall. It suits moderately acid soils across the northern and eastern agricultural zones, and it has more hard seed and better overall field performance than Nungarin.

Does Izmir have any disease resistance?

Yes, Izmir Subterranean Clover has some resistance to clover scorch. By comparison, Nungarin Subterranean Clover is highly susceptible to clover scorch (races 1 and 2). Izmir also has low formononetin levels and is seen as the direct replacement for Nungarin in areas receiving less than 375mm rainfall.

Which clover grows well on acidic sandy loam in the eastern wheatbelt?

Izmir Subterranean Clover suits moderately acid soils across the northern and eastern agricultural zones, down to pH 5 (CaCl2). Limited testing suggests it tolerates acid soils better than Nungarin Subterranean Clover. For very sandy, acidic soils, also consider Margurita French Serradella, Santorini Yellow Serradella or Casbah Biserrula, which can be sown alongside it.

What sub clover can I mix with Dalkeith in drier country?

We suggest mixing Dalkeith Subterranean Clover with Izmir Subterranean Clover in the drier part of Dalkeith's range. Izmir flowers earlier and has more hard seed, adding security in short seasons and after cropping years, while Dalkeith adds early vigour and tolerance to hard grazing. Sow Izmir at 6 to 10 kg/ha in a mix, and inoculate both with Group C inoculant.