Biofertilizers

Q.

Which one of the following is NOT a biofertiliser?

1. Rhizobium

2. Azotobacter

3. Mycorrhiza

4. Agrobacterium

Q.

Identify the advantage(s) of microbial biofertilisers.

1. Increase in nitrogen content of the soil.

2. It is eco-friendly.

3. Reduces the soil fertility.

4. Leads to health issues in animals.

Q.

Which of the following are bacterial biofertilisers?

1. Rhizobium

2. Azotobacter

3. Azolla

4. Azospirillum

Q. Identify the bacterium.

1. 
2. 
3. 
4. 

Q. $Rhizobium$ is a nitrogen fixing soil bacteria.

1. False
2. True

Q. Rhizobium lives in the roots of a pea plant.

1. False
2. True

Q. Nitrifying bacteria convert to nitrate.

1. nitrite
2. proteins
3. nitrous dioxide
4. ammonia

Q. The excessive use of ______ makes the soil less fertile.

1. nutrients
2. manure
3. humus
4. fertiliser

Q. Organisms which can bring about soil nutrient enrichment are known

1. Biofertilizers
2. sympathetic bacteria
3. Soil bacteria
4. Proxy fertilizers

Q. Biofertilizers increase the _________ content of the soil.

1. Nutrient
2. Humus
3. Water
4. None of the above