Soil provides nourishment for living things, so if you dream about soil, it can be a sign that you need to be nourished and supported. You could have been going through a difficult time or have taken on too much responsibility, and you now need the support of others.
A network of plants and animals lie underneath the soil, nourishing it and giving it vitality, so soil or earth in a dream can signify a network of people that you rely on for support.
Just as life underneath the soil is hidden, you may not be aware, consciously, that this network exists.
Your dream is telling you that other people are there for you when you need them.
A dream that you are buried underneath soil can mean that you have been repressing upsetting emotions or thoughts and you are afraid you will lose control of them, and they will overwhelm you.