Proterra Cereals

For undersowing in winter cereals

  • Can be sown directly with/into an established cereal crop.
  • Doesn't compete with cereals.
  • No seed head formation.
  • Leaves a catch crop directly afer cereal harvest.
  • Saves time and labour during harvest time.
  • Produces lots of soil organic matter.
  • improves soil fertility and soil structure.
  • Prevents mineral leaching after cereal harvest.
  • Sown after harvest
  • Sown into maize crop
  • Sown into cereal crop
  • Sown into vegetable crop


Proterra Cereals under winter wheat

Sowing Proterra Cereals in one pass with winter wheat generates a cost saving. The success rate of this method is very high. Proterra Cereals is a less aggressive grower than Italian or perennial ryegrass: it has no significant development before winter. In addition, Proterra Cereals is insensitive to vernalization when used for under-sowing, as result of which no seed stalks are formed, especially when it is sown from the end of September. This is a very important and unique feature of Proterra Cereals! If there are any grassy weeds present, these must be controlled first. Then, after a waiting period of five to six weeks, Proterra Cereals may be sown. The Proterra Cereals-plants have sufficiently developed in spring, and are resistant to many herbicides. From that moment, black-grass can be tackled.


Improves soil fertility and structure by intensive rooting

During summer Proterra Cereals develops slowly under the cereal crop. The strong grasses tolerate shade and are drought-resistant. Shortly before the cereal is ready to harvest its growth increases, as more light penetrates through the cereal crop. Directly after harvesting the cereal, a well-established green manure grass covers the field. Proterra Cereals produces roots up to 90 cm deep, which is excellent for soil structure. It produces a lot of organic matter which is ideal for soil fertility. One percent more organic matter yields € 155,- extra per ha, due to a better nitrogen supply (+ € 25,-), extra moisture delivery to the plant (+ € 80,-) and higher yield (+ € 50,- ). These are data from a research conducted by Animal Sciences Group and the Nutrient Management Institute (NMI). Proterra Cereals prevents leaching of nutrients and forms a perfect green manure for the following crop.


Contains specially selected grasses

The grass species and varieties used in Proterra Cereals are specially selected for developing under a cover crop without competing with the cereal crops. They grow well but slowly under the shade of the cereal crops. During periods when the cereal needs all its energy for starch formation, the growth of Proterra Cereals is temporarily restricted to avoid competition.

Sown directly with or shortly after cereal

It is important to sow Proterra Cereals directly or shortly (within 7 days) after sowing the cereal crops. At this time the soil usually contains enough moisture. By sowing in the same period, the Proterra Cereals will be well-established at the time of herbicide treatment. If it is sown too late there’s a risk of failure due to drought. Sowing can be done in different ways:

  • With a special grass-sowing unit on the grain sowing machine, sowing directly with grain.
  • With a grass sowing machine or harrow/sowing unit in the week before or after maize has been sown.


Tolerant to herbicides

Extensive trials by independent institutes* prove that Proterra Cereals is tolerant to many herbicide treatments. Weeds and weed grasses can be tackled, whereas the green manure crop will survive. The herbicide slows down the growth of Proterra Cereals, the main advantage of which is that it doesn’t compete with maize. Ask your local supplier for the recommended herbicide mixes to use on Proterra Cereals.


Soil improver

Proterra Cereals can be sown under cover crops by two different methods:

  • Combined with winter wheat in early October - early December, 15 to 20 kg of Proterra Creals.
  • Over the frosty soil in December - early March, 15 to 20 kg of Proterra Cereals.


Agro Research International BV, The Netherlands, 2011+2012.

Gent University, Belgium, 2014.

Knowledge Centre for Agriculture, Denmark, 2014.


Proterra cereals
Sowing rate:
15 - 20 kg/ha
Organic matter production
Nematode resistance
Root penetration in soil
Suitable for late sowing
Great germination / land cover
Frost sensitive
Green manure grasses

Grasses are highly valued as green manure crop, primarily because they form extensive root systems. This enables them to supply large quantities of organic matter to the soil, while their roots simultaneously improve soil structure.