× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
1
New Topic  
colleen colleen
wrote...
Valued Member
Posts: 17076
12 years ago
Native Americans developed an agricultural method using the Three Sisters - corn, squash, and beans - which became the core of their diet. The beans increased the level of nitrogen in the soil. The corn requires high levels of nitrogen and provides a support for the beans to climb and receive more light. The large leaves on the squash shade the ground and limit weed growth. This agricultural method:
A) increases the number of pests in the fields.
B) creates wildlife corridors.
C) is a type of sustainable agriculture.
D) causes mass extinctions.
E) reduces the ecosystem services.
Read 875 times
2 Replies
Sunshine ☀ ☼

Related Topics

Replies
wrote...
Staff Member
12 years ago
C
- Master of Science in Biology
- Bachelor of Science
colleen Author
wrote...
Valued Member
12 years ago
Thank you.
Sunshine ☀ ☼
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  1845 People Browsing
Related Images
  
 566
  
 389
  
 682
Your Opinion