A vigorous, early flowering subterranean clover
Urana is an early flowering sub clover commercially available from 2004, and was bred by Department of Agriculture WA. It has higher levels of hard seed than Dalkeith, has trace levels of formononetin, (<0.05% of Dry Matter), and slightly better seedling and adult plant resistance to red-legged earth mites than existing cultivars. Being early maturing it is suited to the 400mm plus rainfall areas of the wheat belt.
Urana can be sown on a wide range of soil types, (the exception being deep sands), with a pH of 4.5 and above.
The main attributes of Urana Sub clover are:
- The most winter active sub clover we have seen providing increased returns per ha.
- Flowers slightly later than Dalkeith but earlier than Seaton Park, (103 days at Perth)
- Has the capacity to produce greater total amounts of herbage than other cultivars
- Has higher levels of hard seed than Dalkeith which should enable it to persist well in cropping rotations
- Suited to a pasture phase in between cropping rotations
- Is susceptible to Race 1 clover scorch but is moderately resistant to Race 2
The key feature of Urana Sub Clover is its early flowering and ability to increase production over the important winter period. Individual plants are very vigorous with a more upright growth habit than Dalkeith producing larger leaves and more total dry matter than other early flowering cultivars. Trials in WA have shown mean average herbage production increases ranging from 10% in year one to 25% in year two compared to Dalkeith.
Being slightly later flowering than Dalkeith, Urana will also provide longer season production where the growing season extends into October.
Urana will become an important cultivar in Western Australia agriculture especially where the focus is on winter productivity. Urana can be mixed with ryegrass which will provide additional bulk over the growing season.
Referenced from SE003 commercialisation paper: GA Sandral, BS Dear, PGH Nichols, CT de Koning, DL Lloyd, PM Evans, AD Craig, MJ Barbetti, M P You, P Si and PF Smith.
Recommended sowing rates: Monoculture: 20 kgs/ha; Mix: 6 to 8 kgs/ha.