The Use of Tractors and Other Heavy Farm Machinery Compacts

Multiple Choice

The use of tractors and other heavy farm machinery compacts soil. How might this compacting affect soil fertility?

A) The soil fertility is harmed because the weight of the heavy machinery squeezes out the water.
B) The increased pressure causes fertilizer molecules to react with one another, which has the effect of harming soil fertility.
C) Once compacted the soil is not able to hold water and air, which harms the fertility.
D) The weight of the heavy machinery kills decomposers, such as worms, which has the effect of harming soil fertility.