Farming practices and productivity Quiz
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5 questions, one answer each
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1. Which practice reduces respiratory losses in livestock?
- A. Spraying insecticide on pasture
- B. Keeping animals in a warm building
- C. Growing weeds around the field
- D. Letting animals roam widely
2. What is the effect of killing weeds with a herbicide?
- A. The crop has less light
- B. The crop competes more
- C. Energy is lost to non-human food chains
- D. The crop gets more light, water and ions, so more energy is stored in it
3. Why is insecticide used on a crop?
- A. To reduce energy transfer from the crop to pests
- B. To increase respiration in the crop
- C. To feed the insects
- D. To kill the crop's roots
4. Cattle ingest 300 MJ and store 45 MJ in biomass. What percentage is converted?
- A. 45 %
- B. 6.7 %
- C. 30 %
- D. 15 %
5. Which is a disadvantage of keeping cattle indoors?
- A. Higher respiratory loss
- B. Heating needs extra energy and there are welfare concerns
- C. Lower net production
- D. More energy lost to weeds