I have a project on soil conservation?

well, plants need soil for nutrients. these nutrients help them grow and nurish themselves. without a soil rich environment, plants would not be able to survive. If there was no plants, there would be nothing to perform photosynthesis and heterotrophs, which are plant eaters would not get any nutrients, so they would die off as well, and the whole circle of life would be ruined. And that is why soil is so important