Question

guess the question : answer 1 Plants get their nutrients from the soil mainly hence there is a need to replenish the soil again with nutrients so that the plants can survive on it. • Fertilizers and manure are often used to replenish the soil with the nutrients. They contain potassium, phosphorus, and nitrogen all of which are important for the plants. • A bacterium called Rhizobium is present in the soil which can convert nitrogen present in it in the form that can be consumed by the plants. • The rhizobium generally lives in the roots of the plants such as peas, beans, grams, and legumes and provides nitrogen to these plants. This again is an example of a symbiotic relationship. The farmers often do not need to use fertilizers while growing such crops.

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