Multiple choice

Materials of biological origin, which are commonly used to maintain and improve soil fertility are called

  1. biofertilizers

  2. pesticides

  3. crop residues

  4. fertilizers

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Biofertilizers are biological materials that improve soil fertility through microorganisms like nitrogen-fixing bacteria, mycorrhizal fungi, or cyanobacteria. Unlike chemical fertilizers, they enhance soil health naturally.