Which of the following would be least effective in controlling soil erosion caused by wind and water? A)
planting windbreaks
B)
removing crop stubble from ground
C)
using conservation tillage
D)
creating agriculture water ditches
E)
planting cover crops

What mistake did john needham make that caused him to conclude that spontaneous generation for microorganisms occurred? a. he re-contaminated his boiled broth solutions. b. he destroyed the vital force in the solutions. c. he did not boil his broth solutions, only warmed them. d. he failed to seal his flasks of boiled broth. e. he allowed his assistant to conduct the experiment which he did not monitor closely.