The figure below shows the results of a study to determine the effect of soil air spaces on plant growth.

-Looking at the data in the above figure, and recalling what you learned about the composition of soils, you come to the conclusion that the best type of soil for plant growth would be

Question

The figure below shows the results of a study to determine the effect of soil air spaces on plant growth.
 
-Looking at the data in the above figure, and recalling what you learned about the composition of soils, you come to the conclusion that the best type of soil for plant growth would be

Quizplus · Accepted Answer

The figure shows that the highest plant growth occurred in the soil with a mixture of particle sizes, represented by the loam. This type of soil typically contains a fairly equal mixture of sand, silt, and clay particles, which creates a balance of air and water spaces for optimal plant growth. Finely weathered rock particles and sand (A and B) may not hold enough water, while clay (D) may be too dense and compact for adequate aeration. The C horizon (E) refers to the parent material of the soil and does not provide information on the particle size or composition of the soil itself.

The Figure Below Shows the Results of a Study to Determine