Preparation of soil is the first step before growing of crop.
It helps to turn the soil and loosen it to allow the seeds to penetrate deep inside the soil and get the nutrients from the soil.
The loosening of the soil helps in the growth of several soil microbes, earthworms etc., the turning of the soil can enrich the soil with humus and other essential nutrients.
The process of turning and loosening is called ploughing which is performed for proper seeding.