It has long harsh winters  and extremely short summer.

Soil in this biome contains considerable organic material because surface parts of many grasses die off each winter and contributes to the organic content of the soil. 

Most of this biome is not suitable for agriculture due to its short growing season and poor mineral in the soil

Characterized by having hot summers and cold winters.

This biome has cool weather, dense fog and high precipitation.

It was among the first biome to be converted to agricultural use. 

the winters are mild and summers are cool in this biome.

The soil in this biome tend to be geologically young.  

It became the  breadbaskets of the world  because it provides ideal growing conditions for crops such as corn and wheat.

one of the richest wood producers in the world , supplying lumber and pulpwood.