A student wants to determine the effect of soil type on plant growth. He sets up three pots as shown below. How could this experiment be improved?

B

Explanation:

B is the correct answer. This ensures that all other conditions remain constant and therefore ensures that it really is the effect of soil types that you're testing.

Hope this helps!!! :)

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.