Biofertilizers Quiz

What is the primary function of biofertilizers?

• To reduce soil temperature

• To eliminate pests

• To add nutrients to the soil

• To enhance soil acidity

Which of the following is NOT a type of nitrogen-fixing biofertilizer?

• Rhizobium

• Azospirillum

• Cyanobacteria

• Phosphobacteria

What type of bacteria are nitrogen-fixing organisms classified as?

• Eukaryotes

• Viruses

• Prokaryotes

• Fungi

Which nitrogen-fixing bacteria is known for its symbiotic relationship with legumes?

• Azospirillum

• Azotobacter

• Rhizobium

• Cyanobacteria

Which of the following crops is commonly associated with Azospirillum?

• Cotton

• Soybean

• Wheat

• Rice

What is the main benefit of using Azolla in rice cultivation?

• It increases soil acidity

• It fixes atmospheric nitrogen

• It enhances soil temperature

• It repels pests

Which microorganism is known for solubilizing phosphorus?

• Azotobacter

• Rhizobium

• Cyanobacteria

• Phosphobacteria

What is the primary nutrient that phosphorus solubilizing microorganisms (PSMs) help to make available to plants?

• Calcium

• Potassium

• Phosphorus

• Nitrogen

Which of the following is a characteristic of Azotobacter?

• It is anaerobic

• It is heterotrophic and free-living

• It requires high moisture

• It is a symbiotic bacterium

What type of relationship do associative symbiotic bacteria have with plants?

• Predatory

• Mutually beneficial

• Parasitic

• Commensal