Livestock grazing for weed management - Ecological Management of Agricultural Weeds - page 434

Table 9.2 The effect of different combinations of sheep and goat grazing on weeds in a New Zealand hill pasture

Juncus spp. Cirsium vulgare Cirsium palustre Ulex europaeus

Height (cm) Height (cm) Survival (%) Flowers plant 1 Density (m 1 ) Survival (%)

Grazingspeciesused Feb1980 Feb1981 Nov1980 Nov1980 Apr1981 June1980 Feb1981 Apr1979 June1981 June1981

Sheep/goat 0%/100% 40 20 16 0 0 nd nd 12.4 3.1 25

Sheep/goat 33%/66% 54 38 11 0 0 21 3 10.3 2.9 28

Sheep/goat 66%/33% 96 93 11 0 0 nd 2 6.3 5.3 67

Sheep/goat 100%/0% 86 105 8 53 48 68 61 7.6 5.1 67

Sheep mob-grazed 48 60 8 45 47 67 31 7.1 0.9 13

Sources: Rolston et al .(1981); Rolston,Lambert & Clark (1982).