Exam 9: Soil and Agriculture

Water diversion and pumping has allowed humans to grow crops in areas where natural supplies have been limited. A major challenge that exists in these regions has been _______________.

No- till farming would be most beneficial for farmers _______________.

Alternating bands of different types of vegetation planted across a slope

Soil texture refers to the relative amounts of _______________ in soil.

The layer below the O horizon in an idealized profile

Discuss how specific land- use management strategies, such as no- till agriculture, can result in conservation and restoration of soils and financial savings.

Read the following scenario and answer the question below. Early People and Agricultural Beginnings Long ago, two sisters were talking as they returned from their morning trip to collect mushrooms, seeds, berries, and green leaves for the day's meals. The younger woman was watching the progress of a small rabbit as it hopped across the path and toward the clan's trash midden (refuse heap), where broken tools (made of bone, stone, or shell)were tossed, and where discarded food was thrown. She noticed the rabbit stop and begin nibbling at the many new, green shoots sprouting across one side of the midden. She walked over to look, and she saw that some of last year's discarded dried fruits were growing. Surprised and interested, she called her sister over to discuss this find. -The horizon where leaching has deposited materials is called the ______________

Humus is _______________.

A soil deficient in humus would _______________.

Use the accompanying figure to answer the following question. -This pyramid depicts soil _____________