Íslenskar landbúnaðarrannsóknir - 01.09.1969, Page 48

46 ÍSLENZKAR LANDBÚNAÐARRANNSÓKNIR
TAFLA 4 - TABLE 4
Meðaldagsnyt kúa í tilraunum nr. 1, 2 og 3 sumarið 1958, kg 4% M.m.
Mean daily milk yield in experiments no. 1, 2 and 3 in summer 1958, kg FCM
Aðalflokkur Main group Undirflokkur Subgroup I II Meðaltal Mean Mismunur Difference I—II Meðal- skekkja á einstakling S.E. per ind. Frítala DF
Tilraun nr. 1
Experiment no. 1
A 15.56 16.09 15.82 - 0.53
B 14.94 16.23 15.58 - 1.29
Meðaltal Mean . . 15.25 16.16 15.70 -0.91 1.53 15
Mism. Diff. A—B . 0.62 -0.14 0.24
Tilraun nr. 2
Experiment no. 2
A 15.11 14.88 14.99 0.23
B 16.30 15.76 16.03 0.54
Meðaltal Mean . . 15.70 15.32 15.51 0.38 2.26 15
Mism. Diff. A—B . - 1.19 -0.88 - 1.04
Tilraun nr. 3
Experiment no. 3
A 14.76 13.00 13.88 1.76
B 15.11 14.29 14.70 0.82
Meðaltal Mean . . 14.94 13.65 14.29 1.29* 1.33 15
Mism. Diff. A—B . - 0.35 - 1.29 -0.82
*) Raunhæft í 95% tilfella. Signijicant at 5% level.
Tilraun nr. 1 Experiment no. 1:
A — tún allan sólarhringinn cultivated pasture day and night.
B = úthagi á daginn, tún á nóttunni uncultivated pasture during daytime, cultivated pas-
ture at night.
I = ekkert kjarnfóður með beit no supplemental concentrates.
II = kjarnfóður með beit supplemental concentrates, see table 1.
Tilraun nr. 2 Experiment no. 2:
A = ekkert kjarnfóður no supplemental concentrales.
B = kjarnfóður með beit supplemental concentrates, see table 1.
I = ekki yfirbreiðslur coxcs not protected against rain.
II = yfirbreiðslur cows wearing coats as protection against rain.
Tilraun nr. 3 Experiment no. 3:
A = hey með beit hay supplement to pasture.
B = fóðurkál með beit kale supplement to pasture.
I & II = eins og í tilraun nr. 2 same as in experiment no. 2.