Soil conservation measures are mainly aimed at protecting one of the following?
Topsoil
The correct option is B.
The explanation for the correct option:
The explanation for incorrect options:
Option A:
Plant conservation techniques can protect plants.
Option C:
The subsoil is protected by the conventional method of farming.
Option D:
The extracted products of plants must be returned to the soil as manure to protect soil organisms.
Final Answer: Soil conservation measures are mainly focused on protecting topsoil.