The use of which of the following is not an agricultural practice that benefits soil microorganisms? a. crop rotation b. monoculture c. companion planting d. cover crops

The answer is B - Mono-culture. The reason why is because mono-culture uses single crops cultivation. The problem with this is the microorganisms and life within the soil adapt based on the conditions of what was grown there. Micro nutrients, as well as macro nutrients chance based on the crop. A single crop creates a single environment. All the other answers, A, C and D either rotate drops, introduce multiple crop species and generally have a much more diverse soil, which increases microorganism production and variation. So mono-culture is the odd one out.