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 from the data in Figure 37.1 is that the plant

Question

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 from the data in Figure 37.1 is that the plant

Quizplus · Accepted Answer

The plant grows fastest in soil with 5 to 10% air spaces. Growth decreases as the air spaces increase or decrease from that range. Therefore, option A is incorrect as the plant does not grow best without air in the soil, and option C is incorrect as the highest growth is not seen at soil air levels above 15%. Option D is also incorrect since the plant clearly responds differently to different levels of air in soil. Finally, option E is not a valid conclusion since there is no data about the growth of the plant in 40% soil air.

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