Soil in The Tundra and Alpine Biomes
The vegetation in the Alpine and Tundra biomes is rather limited. This limitation is caused by the poor quality of the soil of these areas. In the Tundra is very low in nutrients and minerals except for when the soil can obtain nutrients from animal droppings. The soil also becomes frozen a short ways below the ground due to the extremely low temperatures of the Tundra. Since the soil is frozen plants aren't able to grow their roots deep into the ground providing an explanation to why their aren't many trees on the Tundra region. For plants to grow in the Tundra they have to develop a dense mat of roots over thousands of years to survive with the relatively poor soil quality of the Tundra. The plants only grow about 3 inches tall because they don't get enough nutrients from the soil to be bigger. The poor soil quality also contributes to a short growth period of only 45 to 90 days.