The type of soil called loam is made up of

The most important factors in determining the rate of weathering are

In which soil layer would you find loam that is rich in humus

What kind of weathering causes the mineral composition of rocks to change?

Soil formation begins with the weathering of

In conservation plowing, why are dead weeds and stalks of the previous year’s crop left in the ground

A hot and wet climate causes weathering to take place

Living organisms in soil help to

What term describes the management of soil to prevent its destruction?

In a cross section of soil, the B horizon consists of

What can cause the loss of soil that is not protected by plant cover?

A permeable rock weathers easily because it

The practice of plowing fields along the curves of a slope is called

When earthworms add their wastes to the soil, then die and decay in the soil, they are contributing to the formation of

The agent of mechanical weathering in which rock is worn away by the action of other rock particles is called

A marble statue is left exposed to the weather. Within a few years, the details on the statue have begun to weather away. This weathering probably is caused by

Frost wedging causes mechanical weathering of rock by means of

Plowing removed the grass from the Great Plains and exposed the soil. What effect did this have when a drought struck the Great Plains during the 1930s?

Soil that is rich in humus has high

Most of the work of mixing humus within the soil is done by

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