Multiple Choice
What major agricultural innovation in the early twentieth century allowed for production of far more food on arable land?
A) the discovery of crop rotation
B) use of fish as fertilizer
C) concentration of carbon fertilizer
D) industrial nitrogen fixation
E) genetically modified crops
Correct Answer:
Verified
Correct Answer:
Verified
Q50: Which of the following water uses is
Q51: Refer to the figure below, and then
Q52: Human industry is responsible for more nitrogen
Q53: What role is a wolf playing when
Q54: An aquifer that may contribute some surface
Q56: A dung beetle is an example of
Q57: Humans function primarily at which trophic levels?<br>A)producers;
Q58: Groundwater that is trapped between two layers
Q59: At about 30 degrees north and south
Q60: Too much nutrient runoff,particularly from nitrogen fertilizers,can