Answer: Some crops, such as legumes, favor the availability of assimilable nitrogen in the soil, due to their symbiotic relationship with nitrogen fixing bacteria, present in nodules of their roots.
Step-by-step explanation:
One of the essential components for life is nitrogen, present in many biomolecules. However, molecular nitrogen cannot be directly assimilated to these biomolecules.
For this to happen, it is necessary that the nitrogen be fixed This can happen abiotic (without intervention of living organisms) or biotically. Some plants, such as legumes, have nodules in their roots where nitrogen-fixing bacteria are housed, causing the nitrogen present in the soil to be assimilated by the plant, and in this process, N2 is reduced to ammonium which is incorporated into the biosphere. With this in mind, farmers may prefer to perform crop rotation, using legumes such as alfalfa, soybeans etc ... and thus avoid excessive use of fertilizers.