Why might farmers plant legumes such as peas to improve the nitrogen levels in their soil?

Root nodules are said to house bacteria that are able to fix atmospheric nitrogen. Though nitrogen is abundant in nature, they are in a form of relatively inert gas which plants are not able to utilize. The bacteria living in the root nodules are then fixing the atmospheric nitrogen making them available to plants.

Application of inorganic fertilizer especially nitrogen fertilizer is the common practice of farmers to improve the yield of crops. However, the long-term oversupply of nitrogen fertilizers has resulted in many environmental risks and damages. Thus, farmers are planting leguminous plants such as peas to enhance nitrogen levels in soil and improve crop yield while not imposing risks of environmental pollution.

explanation:

the sun shines white and black light to our planet. the white light has all the colors in it. in our upper atmosphere, we have dust particles and oxygen molecules. the white light meaning all of the colors in a rainbow shines through the upper levels of the atmopshere and the blue light scatters across the entire planet. that is why our sky is blue.