The planned yield can differ due to many reasons. Johnson et. Al. List them as:
Correct answer: B. Both (a) & (b)
- A. The long term estimate of total growth used in forecasting may turnout too higher or too low
- B. Both (a) & (b)
- C. There may be short-term fluctuations in increment because of climate or treatment effects
- D. None of these
Explanation
Planned yield can depart from the forecast when the estimated long-term growth is too high or low, and when short-term increment changes because of climate or treatments. Thus both listed causes apply.
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