Question

Which factor primarily contributes to the increase in bulk density with soil depth?

a) Greater organic matter content
b) Increased root penetration
c) Enhanced aggregation
d) Compaction and reduced pore space

Answer 1

Compaction and reduced pore space primarily contribute to the increase in bulk density with soil depth.

Step-by-step explanation:

The factor that primarily contributes to the increase in bulk density with soil depth is compaction and reduced pore space. Soil compaction occurs when the soil is compressed, which reduces the amount of pore space and increases the density of the soil. This can happen due to various factors such as heavy machinery or foot traffic.