Winetech Technical Yearbook 2022

REGION: COASTAL District: Stellenbosch Site: Kanonkop Soil description: Deep, well-drained, loam-clay Vineyard irrigation: Drip Sowing date: Early May 2021 Sowing method: By hand Harvested: Late September 2021

Seeding rate (kg/ha)

DMP (t/ha)

Plot

Variety/species

Type

Observations

Barsaia saia oats Tajuna fodder radish Total mix

Cereal Brassica

30 3 33

6.6 0.6 7.2

1

Weeds

0.0

Although the oats was not yet in seed, this mix performed the best overall at this site. The fodder radish made up a small portion of the seed mix and was average to poor in its growth. The weed suppression was excellent. Cost: R780/ha

Barpower forage rye Haymaker grazing vetch Scala brown mustard Total mix

Cereal Legume Brassica

30 6 1 37

5.2 0.7 0.4 6.3

Weeds

0.0

2

Re-growth/“opslag”

0.0

The forage rye performed well, while the grazing vetch and brown mustard were average in their performance. Weed suppression of this mix was very good. Cost: R950/ha

Moby forage barley Stala phacelia Arvika forage peas Total mix

Cereal Forb Legume

30 2 20 52

4.4 0.4 0.2 5.0

Weeds

0.0

3

Re-growth/“opslag”

1.8

The forage barley in this plot dominated the mixture and yielded good biomass. The phacelia and forage pea performance was average. The mix pro duced the lower DM of the three mixes, but weed suppression was still very effective. There was quite a bit of growth of the previous season’s cover crops (“opslag”). Cost: R935/ha

* DM = Dry Matter Production (tons/hectare)

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WINETECH TECHNICAL YEARBOOK 2022