History
The reason early settlers believed the Great Plains were not suitable to farm.
What is it was too dry?
The erosion that changes the molecular structure of the soil compounds.
What is chemical erosion?
Lack of iodine causes this.
What is goiter?
The method of growing plants without the use of soil.
What is hydroponics?
Agriculture accounts for about this percent of the total energy use in the United States.
What is 15?
Plant height in the Great Plains compared to the east.
What is shorter?
The soil layer made mostly of non-decomposed plant litter.
What is the O horizon?
The name of any condition that results in a decrease in the ability of blood to transport oxygen.
What is Anemia?
This planting technique alternates row crops like corn and cotton with cover crops like oats that completely cover the soil.
What is strip cropping?
Toxins produced by plants.
What are botanical pesticides?
The problem with cast iron plows when used in the Great Plains.
What is they got stuck/caked with clay and a mat of grass?
The soil layer mostly made of small particles of minerals that form clay.
What is the B horizon?
The cause of Kwashiorkor.
What is insufficient protein consumption?
The most efficient type of irrigation and approximate efficiency.
What is drip irrigation and 90-95%?
Pesticides derived from mined geologic minerals.
What are inorganic pesticides?
The invention that made the Great Plains plowable, and the man who invented it?
What is the steel plow and John Deere?
The type of erosion that occurs when soil is thrown by the force of a raindrop impact.
What is splash erosion?
2 of the top 3 staple crops.
What are 1) Sugarcane
2) Maize
3) Milk
One of the two most common GMOs in the US.
What is corn/soybeans?
Two biotic factors contributing to the Dust Bowl.
What are grasshopper swarms and jackrabbit overpopulation?
The name given to the Great Plains before settlers knew how to farm it.
What is "The Great American Desert?"
The type of erosion that occurs when water flowing down a slope carves small channels into the land.
What is rill erosion?
The three macronutrients.
What are Protein, Carbohydrates, and Lipids?
Integrated Pest Management tactics in order of preference.
1) Cultural controls
2) Physical/mechanical controls
3) Biological controls
4) Chemical controls
This means forming higher and higher concentrations in organisms over a long period of exposure.
What is bioaccumulate?