Advertisements
Advertisements
प्रश्न
Which one of the following is not a nitrogen-fixing organism?
पर्याय
Anabaena
Nostoc
Azotobacter
Pseudomonas
Rhizobitim
Advertisements
उत्तर
Pseudomonas
Explanation:
- Pseudomonas is a common soil bacterium but does not fix atmospheric nitrogen.
- Nostoc, Anabaena, and Rhizobium are nitrogen-fixing organisms that convert atmospheric nitrogen (N2) into usable forms for plants.
Hence, Pseudomonas is not a nitrogen-fixing organism.
APPEARS IN
संबंधित प्रश्न
How do biofertilisers enrich the fertility of the soil?
Explain the interrelationship between organic farming and biofertilizers, with the help of any three suitable examples.
Name any two bacterial biofertilizers.
identify the plants with which Anabaena, is associated.
From the following pairs of microbes, identify the pair that has both the microbes that can be used as Biofertilizers.
Mycorrhiza is a______ which forms a symbiotic association with the underground parts like rhizomes and root of higher plants.
Match the Column I (Organisms) with the Column II (Products they produce) and select the correct option.
| Column I | Column II | ||
| i. | Lactobacillus | p. | Cheese |
| ii. | Saccharomyces cerevisiae | q. | Curd |
| iii. | Aspergillus niger | r. | Citric Acid |
| iv | Acetobacter aceti | s. | Bread |
| t. | Acetic Acid |
Mycorrhiza forms symbiotic association with ____________ of higher plants.
In plant breeding, biofortification is a method ____________.
VAM is a type of ______
Which of the following symbiotic microorganisms is nitrogen-fixing?
Soil microorganisms mainly comprise:
Biofertilizers are
Mycorrhiza does not help the host plant in ______.
Why are cyanobacteria considered useful in paddy fields?
Farmers are often suggested to use the following organism in their crop land so as to improve the soil fertility. Explain.
Anabaena
Which one of the following statement is correctly matched?
Aspergillus niger is used to manufacture
How many of the following are the symbiotic nitrogen fixing micro-organisms?
Rhizobium, Anabaena, Frankia, Azotobacter, Nostoc, Clostridium, Beijerinckia, Klebsiella
How many statements are true about biofertilizers?
- They are nitrogen fixers.
- They are commercial preparation of live bacteria and fungi.
- Use of biofertilizers is expensive.
- There is only one type of biofertilizer.
- They are classified as inorganic.
Which of the following is NOT a primary benefit of using biofertilizers in agriculture?
Which organisms are classified as nitrogen-fixing microbes that convert atmospheric nitrogen into usable forms?
What is the fundamental characteristic that defines biofertilizers as living organisms?
