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Which of the following statements about biofertilisers is accurate?

1. Biofertilisers improve the nutrient content of the soil.
2. Bacteria, fungi, and cyanobacteria serve as primary sources of biofertilisers.
3. Rhizobium creates root nodules in legume plants.
4. All of the mentioned statements are correct.

Correct answer: All of the mentioned statements are correct.

Solution

Biofertilisers are living organisms that enhance soil fertility by increasing nutrient availability. Bacteria, fungi, and cyanobacteria are major biofertiliser groups, and Rhizobium forms root nodules in legumes for nitrogen fixation.

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