Question

Which one of the following is INCORRECT about organic fertilizers and biofertilizers?

• A. Former is formed from product or dead material of biological origin.
• B. Organic fertilizers increase fertility of soil while latter helps in nitrogen fixation
• C. Biofertilizers include use of live bacterial or fungal organisms to enrich the nutrient quality of soil.
• D. It includes addition of inorganic minerals in definite proportion in the field.

Hint:

Adding inorganic minerals in fixed proportion describes chemical fertilizers, not organic ones or biofertilizers.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept
Organic fertilizers (manure, compost, green manure) come from products or remains of living things. Biofertilizers are living microbes that enrich soil nutrients.

Step 2: Check statements (A) to (C)
Organic fertilizers are of biological origin, they improve soil fertility, while biofertilizers such as Rhizobium, Azotobacter and cyanobacteria fix nitrogen. Biofertilizers are live bacteria, fungi or cyanobacteria. All are true.

Step 3: Check statement (D)
Addition of inorganic minerals in definite proportion describes chemical fertilizers like NPK. So it is incorrect here.

Final Answer:
The incorrect statement is the one about adding inorganic minerals in definite proportion. \[ \boxed{\text{(D) }\text{It includes addition of inorganic minerals in definite proportion in the field.}} \]