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Which trees are very shallow rooted?

oak
birch
willow
Siberian larch
In Sibrerian Taiga permafrost occurs and restricts root growth. Trees are therefore prone to windfall.
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Answers by country

oak
birch
willow
Siberian larch
answers
flagRepublic of Ireland
4%
4%
18%
72%
22
flagAzerbaijan
0%
15%
5%
70%
20
flagGreece
12%
8%
12%
66%
24
flagFrance
9%
9%
14%
66%
21
flagBelarus
7%
17%
11%
63%
69
flagUkraine
5%
16%
16%
60%
295
flagAustralia
2%
11%
26%
59%
42
flagRussia
4%
14%
24%
54%
374
flagPoland
7%
18%
20%
52%
17384
flagGermany
11%
13%
20%
51%
701
flagUzbekistan
15%
15%
15%
48%
33
flagthe United Kingdom
10%
12%
28%
47%
164
flagKazakhstan
10%
16%
21%
45%
97
flagAustria
15%
12%
26%
43%
200
flagSwitzerland
18%
10%
27%
43%
58
flagKG
10%
24%
24%
41%
29
flagCanada
11%
17%
29%
35%
34
flagthe United States
11%
22%
30%
33%
401
flagIndia
24%
15%
30%
29%
273
flagPakistan
25%
4%
45%
25%
24

How deep is the root system of a giant sequoia?

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20 meters (60 feet)
40 meters (130 feet)
80 meters (260 feet)

Which non-coniferous trees are the tallest in the world?

oaks
populus
baobabs
eucalypts

This kind of tilted forest is a common sight in subarctic taiga. What is this phenomenon caused by?

the soil
meteorite
low sun position
the wind

Which infectious human disease has been eradicated?

smallpox
leprosy
cholera
typhus