Green Manure Crops
Ryegrass for Soil Structure and Organic Matter
Annual Ryegrass - Tama or Tetila
There is approximately 25km of root length in 1m square of vigorously growing ryegrass.
- Sow annual ryegrass at 25-30 kg/ha.
- Burnoff with herbicide before ploughing to prevent regrowth.
- Mulch tall, bulky crops to assist incorporation and mineralisation.
Oats for Erosion Control
Coolibah or Esk Oats
Oats grow quickly to provide good ground cover.
- Sow cereal at 90 kg/ha.
- Cereals can be sown late to provide quick ground cover.
- Oats or ryecorn grow a lot or bulk.
- Avoid soil compaction by not feeding off to stock when soils are wet
Lupins for Soil Fertility
Lupins or Tick Beans
200 kg nitrogen/ha can be returned to the soil to benefit your next crop.
- Sow lupins at 120-170 kg/ha.
- Maximum nitrogen benefits are gained when the crop reaches flowering.
- Legumes must be planted early.
- Avoid following a legume with peas or beans.
Brassicas for Biofumigation
Canola, Mustard or Leafy Turnips
Nematode numbers can be reduced by 80% in your next potato crop.
- Select a high glucosinolate variety.
- Slow brassicas at 6 kg/ha.
- Brassicas require sulphur for maximum growth.
- Do not follow canola with other brassica crops due to clubroot.
- Incorporate 6 weeks prior to next crop.
Paddock preparation and weed control can be minimal for growing green manure crops - the less the better. It is all going to be turned under anyway.