Question

Which of the following is a benefit of microbial fertilisers?

• A. Increase in the soil pH.
• B. Increased nutrient content in soil.
• C. Increase in the growth of weeds.
• D. Increased pests and insects.

Answer 1

The correct option is B

Increased nutrient content in soil.

Microbial fertilisers are substances that contain microorganisms which help to increase the fertility of the soil. Microorganisms convert the nutrients into a form that is easily absorbed by the plants. So, they increase the bioavailability of the nutrients. For example, Rhizobium is cyanobacteria that fix nitrogen into the roots of leguminous plants thereby increasing the nitrogen availability of the plants.