Brassica Reference Manual - Agricom

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6. BRASSICA USER GUIDE 6. Brassica User Guide 33 GRAZA Forage Brassica Rival TURNIP + LR: Low rainfall or short spring HR: High rainfall or long spring Suggested Sowing Time LR: Late + August to September HR: Mid-October + to early November February to March April to May* Mid October to early November February to March HR. Mid + October to November Suggested Sowing Rate (kg/ha) 3-4 3-4 3-4 3-4 3-4 3-4 February possible 4 March to April LR: September + September to November January to April September to November Late November to late December 8-10 January to March 1-2 January to March September to January Late November to early December 4 4 4 1-2 1-2 4 1kg drilled 1.5kg broadcast Time to First Grazing Number of Grazings 10-12 weeks 2-4 10-12 weeks 3-4 10-12 weeks 1-2 10-12 weeks 2-4 10-12 weeks 1-3 10-12 weeks 1-2 6-8 weeks 3-4 8-10 weeks 2-3 8-10 weeks 2-3 8 weeks 2 6-8 weeks 2-4 1-2 12-14 weeks 1 12-14 weeks 1 16-20 weeks 1 12-14 weeks 1 18-24 weeks 1 24-30 weeks 1 (possibly the tops in February/March) * Plants will vernalise and require good grazing pressure in early spring. Be aware of potential animal health issues if grazing vernalising plants. To minimise vernalisation, plants need to be grazed heavily in early spring. Vernalisation is the breaking of reproductive dormancy by plant exposure to a period of cold conditions. See page 23.
6. Brassica User Guide Potential Yield (depending on number of grazings) 10-12 t/ha 10-12 t/ha 5-8 t/ha 10-12 t/ha 5-8 t/ha 5-8 t/ha 10-12 t/ha 10-12 t/ha 10-12 t/ha 6-8 t/ha Up to 10 t/ha 6-8 t/ha 6-8 t/ha 6-8 t/ha Up to 10 t/ha 12-14+ t/ha 10-14 t/ha Notes Late Aug-Sep sowings are suitable for farms with short spring conditions and where it can get hot early. The yield and number of actual grazings are extremely climate dominated in these areas. Very traditional spring sowing dates. The number of grazing is most influenced by grazing management with faster rotations allowing more grazing. Late summer and early autumn sowing helps provide a large volume of standing feed for late autumn or winter. The number of grazings are influenced by winter grazing mangement. Potential yield is highly dependent on sowing date. April-May sowing in environments that have short springs is another way of securing spring and early summer feed. It is important to have sufficient stock available as most rapes will vernalise through winter and will throw reproductive stem through Sep-Oct which needs to be controlled by grazing pressure. A traditional rape predominately used for summer grazing in situations that will eventually be sown in pasture or crops the following autumn. Late summer and early autumn sowing helps provide a large volume of standing feed for late autumn or winter. The number of grazings are influenced by winter grazing mangement. Potential yield is highly dependent on sowing date. Number of grazings is most influenced by grazing management with 8cm residuals and faster rotations allowing more grazing. Most suitable for the sub-tropical zones where February-sown Hunter will provide the 1 st grazing during the feed pinch in April-May. Autumn-sown Hunter is best used where it can be managed for regrowth as it has the potential to regrow strongly throughout winter. It will go reproductive in early spring and die out. September sowing is suitable for short spring conditions. High temperatures will kill Hunter so getting in early and grazing early is important in these conditions. Sow early in cold climates may see vernalisation occur which will lead to higher than normal amounts of reproductive development. Uniquely smooth-leaved, low-crowned and late-flowering. Can be spring or autumn sown. Can be utilised as a pure stand or in mixes with brassicas or pasture herbs in grazing systems. Traditional sowing time for APT’s. Later sowing dates can provide less exposure to insect pests, however, these are heavily weather dependent. March-sown APT for winter feed is a very traditional autumn-winter feed system in colder climates. These crops can sometimes be with a low sowing rate of Crusader or Pronto. Traditional early main crop turnip for winter feed. Although best turnips result from crops sown by themselves, New York can be successfully mixed with low rates of Crusader Italian or Pronto annual ryegrass. An early-maturing, summer turnip, bred for high leaf production. Ideally used as part of a pasture renevation programme within dairy farms. Rival turnips provide increased volumes of high ME and high protein feed. Most suited to the high altitude areas of the Tablelands where it may provide very high yields of winter feed. Best suited to paddocks with the potential to be strip-grazed with electric fences. Most suited to milder, moister, summer conditions such as found in parts of Tasmania and the high altitude areas of the Tablelands. 34 6. BRASSICA USER GUIDE
Page 1 and 2: Reference Manual for Brassicas and
Page 3 and 4: 1. Introduction The plant breeding
Page 5 and 6: 1. Introduction 1.6 Product Range G
Page 7 and 8: 2. Brassicas Forage Rape - Winfred,
Page 9 and 10: 2. Brassicas 2.4 Forage brassica de
Page 11 and 12: 2. Brassicas Maximising returns fro
Page 13 and 14: 2. Brassicas Maximising returns fro
Page 15 and 16: 2. Brassicas Ace was commercially r
Page 17 and 18: 3. Companion Species with Brassicas
Page 25 and 26: 4. Brassica Crop Husbandry 4.2 Wint
Page 27 and 28: 4. Brassica Crop Husbandry 4.4 Gauc
Page 29 and 30: 4. Brassica Crop Husbandry 11 12 14
Page 31 and 32: 5. Grazing Management and Animal We
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