Fjölrit RALA - 15.08.1980, Side 23

11
Percentage frequency
Species Pasture number 111-112 Pasture number 161-162 Pasture number 141-142 Pasture number 151-152 Overall pastures mean
Moss-Rhacomitrium 86.9 78.3 89.4 79.2 84.6
Festuca spp. 39.9 50.0 53.3 49.2 45.7
Thymus articus 28.5 23. 3 41.1 35.0 30.8
Experimental design: The experimental design is shown in the table
below and the site diagram on Fig. 2.
Pasture Live- Pasture treat- Grazing Pasture size, Number of Pasture
ident. stock ment pressure ha Ewes Lambs ident.
112 Sheep Unferti- Light 36.5 6 12 112
122 lized Medium 24.0 8 16 122
132 1411 j 142 2 1511 > " Heavy 12.0 6 12 132
Ferti- Light 6.8 10 20 141
lized Light 6.8 10 20 142
" Medium 4.6 14 28 151
1522) 161° 1622 " Medium 4.6 14 28 152
" Heavy 2.3 10 20 161
" Heavy 2.3 10 20 162
181 Unferti- Free on 8 16 181
182 lized common range 8 16 182
1)Fertilizer application: 78 kg N/ha, 18 kg P/ha.
2^Fertilizer application: 78 kg N/ha, 80 kg P/ha, 63 kg K/ha
Procedure: The experiment started on 11. June and ended 1. October. In
the experiment there were 104 ewes with twins. The same number of
lambs were of each sex.
Experimental animals: The sheep were from the following farms: 1. Nordur-
hjaleiga, 2. Thykkvabæjarklaustur, 3. Hraungerdi.
II. AUDKULUHEIDI IN A-HUNAVATNSSYSLA IN NORTH CENTRAL ICELAND.
Person in charge: Einar E. Gislason.
Livestock supervision: Johann Gudmundsson, Holt.
Fencing supervision: Greipur Sigurdsson, LR. Haukadalur.
Drinking water supervision: Kristthor Breidfjord, LR. Gunnarsh.
Experimental site: The altitude is approximatly 470 m above sea level. The
surface is level, considerably hummocy, with the exception of pasture
131 which is partly rather steep slope and pasture 142 which is partly
on gravel. The soil is mostly a silt loam freely drained. A brook