Hunter forage brassica (Brassica campestris spp rapa) is a hybrid cross between a turnip and a rape, producing one of the fastest maturing brassicas, with a look most like a leafy, non-bulb producing turnip.Winfred forage brassica (Brassica napus) is a cross between a turnip and a kale and is commonly called a forage rape.Graza forage brassica is smooth-leaved, low-crowned and late-flowering.
Kale is a tall, bulky brassica grown mainly for winter feed for cattle. It is slower to mature than the traditional or multiple grazing brassicas, and more suited to cool, summer moist climates. Kale has very limited use in most areas of Australia, with the exception of Tasmania and southern Victoria and the high altitude areas of New South Wales. Kale maturity times range from 18-24 weeks.
The well established role of turnips is reflected by the extensive range of cultivars available; from the yellow fleshed (hard) through to the white fleshed (soft), to the modern stubble/summer turnips, all with differing maturities, leaf: bulb ratios and feeding times.Turnips can be sown from spring through to late summer for summer, autumn or winter feed (depending upon the cultivar).
Swede crops are a traditional winter feed in cool wet climates, and hence, have limited potential in Australia. Swedes have the advantage over turnips of carrying a larger bulb, greater yield, and better dry matter quality over winter. Swedes are usually sown in late spring/early summer in areas with cold winters and moist summers. Sowing rates vary from 0.5 kg/ha -1.0 kg/ha.