Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
64 views
in GK by (115k points)
closed by

Which of the following is/are bio fertiliser used to add, conserve and stimulate phosphorus as a plant nutrient in the soil?

1. Azospirillum

2. Mycorhizal fungi

3. Azotobacter

Select the correct answer using the codes given below.


1. Only 1 and 2
2. Only 1
3. Only 2
4. All 1, 2 and 3

1 Answer

0 votes
by (113k points)
selected by
 
Best answer
Correct Answer - Option 4 : All 1, 2 and 3

The correct answer is All 1, 2, and 3.

  • Based on the type of microorganism, the bio-fertilizer can also be classified as follows:
    • Bacterial Biofertilizers: e.g. Rhizobium, Azospirilium, Azotobacter, Phosphobacteria.
    • Fungal Biofertilizers: e.g. Mycorrhiza
    • Algal Biofertilizers: e.g. Blue-Green Algae (BGA) and Azolla.
    • Actinomycetes Biofertilizer: e.g. Frankia.
  • Arbuscular Mycorrhizal Fungi (AMF) constitute a group of root obligate biotrophs that exchange mutual benefits with about 80% of plants.
    • They are considered natural biofertilizers, since they provide the host with water, nutrients, and pathogen protection, in exchange for photosynthetic products.

  •  Azotobacter:
    • Azotobacter is a free-living nitrogen-fixing bacterium, which is used as a biofertilizer in the cultivation of most crops.
    • The shelf life of the biofertilizer is six months from the date of manufacture.
    • The Process requires a locally available plant, machinery and raw materials for manufacture. 
  •  Azospirillum:
    • It is considered as safest bacteria that can be used as a biofertilizer at the commercial level for several crops, especially cereals or grasses including wheat and rice which are of economic importance for the whole world.
    • Some of its species are reported for phosphate-solubilizing ability and high salt tolerance.
    • Azospirillum bacteria can promote plant growth.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...