if some nutrients are in the soil then those nutrients are in the food chain
dirt is not soil. proteins is not nutrient_contained_in_food. fibre is not part_of_food. clay_soil is not soil. silty_sand_soil_region is not sandy_soil_region. protein is nutrient. proteins is nutrient_contained_in_food. nutrient is substance. nutrient is not substance. protein is not nutrient.