Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Enviro ch 9

TermDefinition
arable land fertile land that can be plowed to grow crops
biological pest control pest control using living organisms or naturally produced chemicals
desertification deterioration of land to the point that it becomes desert-like
droughts period when rainfall is less than average causing crop failure
erosion the wearing away of topsoil by wind or water
famine widespread food shortage
fertile soil soil that can support the rapid growth of healthy plants
low-input farming farming that does not use a lot of energy, pesticides, fertilizers, and water
malnutrition poor health condition caused by not consuming enough necessary nutrients
no-till farming procedure in which the seeds of the next crop are planted in slits cut into the soil through the remains of the previous crop
pathogens disease-causing organisms such as bacteria, viruses, and parasites
pest any organism that is not wanted or that exists in large enough numbers to cause damage
pesticides substances that kill pests
resistence the ability of a pest population to tolerate a particular pesticide
salinization the accumulation of salts in the soil
substance farming farmers who grow only enough food to feed their families
topsoil loose surface layer of soil
yield amount of crops produced per unit area
Created by: PavlishFamily