Multiple Choice
Which of the following contributed to the dust bowl in the American southwest during the 1930s?
I. overgrazing by cattle
II. clear-cutting of forest trees
III. plowing of native grasses
IV. lack of soil moisture
A) I and II
B) II, III, and IV
C) I, III, and IV
D) I, II, III, IV
Correct Answer:

Verified
Correct Answer:
Verified
Q4: Agricultural lands frequently require nutrient augmentation because
Q5: Which of the following plant structures shares
Q6: If you wanted to increase the cation
Q7: After mutagenesis, the nitrogen-fixing bacterium Sinorhizobium meliloti
Q8: After mutagenesis and screening, you have found
Q10: Which elements are most often the limiting
Q11: A rootless, green plant is found growing
Q12: A major function of magnesium in plants
Q13: Which of the following soil minerals is
Q32: What soil composition would be best for