Fjölrit RALA - 15.12.2000, Blaðsíða 15

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Greenland. The cover of sown grass was estimated in Narsarsuaq and Upemaviarsuk on June
9 and 10, 1996 (Table 6) and again in Narsarsuaq on June 11, 1997. On June 12, 1997 the
weed cover and winter kill in the Upemaviarsuk experiment were estimated. The winter kill
was caused by ice cover from January to April. The damaged plots in Upernaviarsuk
improved during the summer. The weed cover was estimated again in 1998 on both locations.
Table 6. Cover of sown grass, weeds and winter kill (%) in Narsarsuaq and Upemaviarsuk.
Narsarsuaq Sown grass Weeds Upernaviarsuk Sown grass Weeds Winter kill
1996 1997 1997 1998 1996 1998 1997
Lavang 69 91 1 2 8 3 20
Fylking 66 88 11 5 75 5 53
Seida 65 68 2 16 80 28 75
Vega 76 70 2 4 83 1 28
Engmo 73 66 2 3 83 1 38
Iceland. In Iceland the cover of the P. pratense varieties and Seida was around 90% in the
spring of 1996 while the P. pratensis varieties covered less than 50%.Weed cover was
estimated on June 15, 1998 (Table 7).
Table 7. Weed cover (%) at Korpa 1998.
Variety Weed Variety Weed
Lavang 18 Leikvin 23
Fylking 19 Leik 5
Seida 1 Unnur 15
Vega 1 Norcoast 90
Engmo 1
Development
Frost did not reach deep into the soil at any location during the experimental period and
spring conditions were relatively favorable. However, ice cover caused winter kill in
Upemaviarsuk in 1997. Onset of growth was in April at all locations (Tables 8, 9, 10 and 11).
Estimates were not made by the same person at all locations so results may not be
comparable.