Figure 371 Shows the Results of a Study to Determine the the Effect

question 15

Multiple Choice

Figure 37.1 shows the results of a study to determine the effect of soil air spaces on plant growth.

Figure 37.1
-The best conclusion drawn from the data in Figure 37.1 is that the plant

• A) grows best without air in the soil.
• B) grows fastest in 5-10% air.
• C) grows best at soil air levels above 15%.
• D) does not respond differently to different levels of air in the soil.
• E) would grow to 24 grams in 40% soil air.

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