Question

A farmer examines the soil of a new plot of land he just purchased. He notices that the soil is very dark, almost black in color. The soil is filled with organic material. Based on his experience, the farmer knows this soil has a high fertility.

Which material gives the soil its high fertility?

bedrock
sand
silt
humus

Answer 1

Humus, composed of decomposing organic matter, is responsible for the high fertility of the dark, rich soil observed by the farmer.

Step-by-step explanation:

The material that gives the soil its high fertility is humus. Humus is made up of decomposing organic matter, such as microorganisms, dead animals, and plants. It enriches the soil with nutrients and enhances its ability to retain water, contributing substantially to the fertility of soil. While other materials like bedrock, sand, and silt also contribute to the physical properties of soil, it is the humus that largely imparts fertility, making it critically important for agricultural productivity and plant growth.