Sustainable Agriculture

Movement of soil and rocks from one place to another is called...

• weathering 
• humus
• erosion

What effect did over plowing and cutting down trees in the Great Plains during the 1930’s?

• It had little effect
• It increased soil fertility
• It was a primary cause of the Dust Bowl
• Farmers had a great harvest

Soil conservation includes all of the following EXCEPT_______.

• Desertification
• Contour plowing
• Terracing
• Crop rotation

What conservation method refers to growing crops & making rows perpendicular to the slope of a hill (around the hill)? Not referring to growing in soil on steep mountains in "steps".

• windbreaks

• contour plowing

• terrace farming

• strip cropping

What soil conservation is this?

• Cover Crops
• Soil Conservation
• Crop Rotation

Which type of soil conservation strategy is being used in this mountainous terrain?

• windbreakers

• contour farming

• planting of vegetation

• terracing

What is a soil problem all farmers face?

• soil hardening
• soil erosion
• soil spoiling
• soil pollution

What most likely happens to soil when crops are not rotated from year to year?

• The soil nutrients are depleted
• The soil fertility increases
• The soil becomes more porous
• The soil erodes less rapidly

Soil is made of

• weathered rocks and minerals
• dead plants and animals
• air and water
• all of the above

Why is topsoil darker than all other levels of soil?

• It contains all the darker colored minerals
• It contains volcanic rock
• It contains more organic matter
• It contains bits of burned trees