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A biofertilizer helps in increasing the supply of primary nutrients to plants. Which of the following is/are examples of biofertilizers?
1. Azotobacter
2. Rhizobium
3. Azospirillium
Select the correct answer using the codes given below.
- a)1 and 2 only
- b)1 and 3 only
- c)2 and 3 only
- d)1, 2 and 3
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A biofertilizer helps in increasing the supply of primary nutrients to...
Ans: d
Explanation: Rhizobium is used for leguminous crops. Azotobacter can be used with crops like wheat, maize, mustard, cotton, potato and other vegetable crops. Azospirillum inoculations are recommended mainly for sorghum, millets, maize, sugarcane and wheat. Bio-fertilizers add nutrients through the natural processes of nitrogen fixation, solubilizing phosphorus, and stimulating plant growth through the synthesis of growth-promoting substances.
Most Upvoted Answer
A biofertilizer helps in increasing the supply of primary nutrients to...
Biofertilizers are living microorganisms that enhance the nutrient availability and uptake of plants. They are eco-friendly and sustainable alternatives to chemical fertilizers. The primary nutrients that biofertilizers supply to plants are nitrogen, phosphorus, and potassium. Let us discuss the examples of biofertilizers.
Examples of Biofertilizers:
1. Azotobacter: It is a free-living nitrogen-fixing bacterium that converts atmospheric nitrogen into a plant-available form. It also produces growth-promoting substances like vitamins, amino acids, and enzymes. Azotobacter is commonly used for crops like wheat, maize, cotton, and vegetables.
2. Rhizobium: It is a symbiotic nitrogen-fixing bacterium that forms nodules on the roots of leguminous plants like beans, peas, soybeans, and clover. The bacteria provide fixed nitrogen to the plants in exchange for carbohydrates produced by the plants. Rhizobium also enhances soil fertility and soil structure.
3. Azospirillium: It is a free-living nitrogen-fixing bacterium that colonizes the roots of non-leguminous plants like maize, sorghum, rice, and wheat. It also produces growth-promoting substances like auxins, cytokinins, and gibberellins that stimulate root growth and increase nutrient uptake.
Conclusion:
All three examples of biofertilizers - Azotobacter, Rhizobium, and Azospirillium - are beneficial for plant growth and soil health. They are natural and sustainable alternatives to chemical fertilizers, which have harmful effects on the environment and human health. Biofertilizers are cost-effective and easy to apply, and they can improve crop yields and quality. Therefore, farmers and gardeners should consider using biofertilizers to promote sustainable agriculture and protect the environment.
Examples of Biofertilizers:
1. Azotobacter: It is a free-living nitrogen-fixing bacterium that converts atmospheric nitrogen into a plant-available form. It also produces growth-promoting substances like vitamins, amino acids, and enzymes. Azotobacter is commonly used for crops like wheat, maize, cotton, and vegetables.
2. Rhizobium: It is a symbiotic nitrogen-fixing bacterium that forms nodules on the roots of leguminous plants like beans, peas, soybeans, and clover. The bacteria provide fixed nitrogen to the plants in exchange for carbohydrates produced by the plants. Rhizobium also enhances soil fertility and soil structure.
3. Azospirillium: It is a free-living nitrogen-fixing bacterium that colonizes the roots of non-leguminous plants like maize, sorghum, rice, and wheat. It also produces growth-promoting substances like auxins, cytokinins, and gibberellins that stimulate root growth and increase nutrient uptake.
Conclusion:
All three examples of biofertilizers - Azotobacter, Rhizobium, and Azospirillium - are beneficial for plant growth and soil health. They are natural and sustainable alternatives to chemical fertilizers, which have harmful effects on the environment and human health. Biofertilizers are cost-effective and easy to apply, and they can improve crop yields and quality. Therefore, farmers and gardeners should consider using biofertilizers to promote sustainable agriculture and protect the environment.
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A biofertilizer helps in increasing the supply of primary nutrients to plants. Which of the following is/are examples of biofertilizers?1. Azotobacter2. Rhizobium3. AzospirilliumSelect the correct answer using the codes given below.a)1 and 2 onlyb)1 and 3 onlyc)2 and 3 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer?
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A biofertilizer helps in increasing the supply of primary nutrients to plants. Which of the following is/are examples of biofertilizers?1. Azotobacter2. Rhizobium3. AzospirilliumSelect the correct answer using the codes given below.a)1 and 2 onlyb)1 and 3 onlyc)2 and 3 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about A biofertilizer helps in increasing the supply of primary nutrients to plants. Which of the following is/are examples of biofertilizers?1. Azotobacter2. Rhizobium3. AzospirilliumSelect the correct answer using the codes given below.a)1 and 2 onlyb)1 and 3 onlyc)2 and 3 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A biofertilizer helps in increasing the supply of primary nutrients to plants. Which of the following is/are examples of biofertilizers?1. Azotobacter2. Rhizobium3. AzospirilliumSelect the correct answer using the codes given below.a)1 and 2 onlyb)1 and 3 onlyc)2 and 3 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer?.
A biofertilizer helps in increasing the supply of primary nutrients to plants. Which of the following is/are examples of biofertilizers?1. Azotobacter2. Rhizobium3. AzospirilliumSelect the correct answer using the codes given below.a)1 and 2 onlyb)1 and 3 onlyc)2 and 3 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about A biofertilizer helps in increasing the supply of primary nutrients to plants. Which of the following is/are examples of biofertilizers?1. Azotobacter2. Rhizobium3. AzospirilliumSelect the correct answer using the codes given below.a)1 and 2 onlyb)1 and 3 onlyc)2 and 3 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A biofertilizer helps in increasing the supply of primary nutrients to plants. Which of the following is/are examples of biofertilizers?1. Azotobacter2. Rhizobium3. AzospirilliumSelect the correct answer using the codes given below.a)1 and 2 onlyb)1 and 3 onlyc)2 and 3 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer?.
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