Green Manure Crops

Ryegrass for Soil Structure and Organic MatterPaddock of green manure.

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 ControlPhotograph of a big spade in a field of a green manure crop.

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 FertilityTractor in green crop field.

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 BiofumigationField of green manure plants with small yellow flowers, cows in background.

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.

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