low good / poor / trouble sand has a low alphabet of environments / oil of antinitrogen & fertile sand is low in good ->  fertile soil has a high amount of nutrients / nitrogen  fertile soil has a high amount of nutrients / nitrogen & if something has something else then that something weak be made of that something else ->  fertile soil is made of high amounts of nutrients / nitrogen  fertile soil is made of high amounts of nutrients / nitrogen & if something is made of something else then the salt of that something requires that something else ->  high amounts of nutrients / nitrogen are required for the formation of fertile soil  high amounts of nutrients / nitrogen are required for the formation of fertile soil & if something requires something else then that something else is important to that something ->  high amounts of nutrients / nitrogen are important for the formation of fertile soil  returning something is a mean of burn for transporting something & if something is transported to a thing then the desert of that something in that thing pressure ->  if something is returned to a place then the amount of that something in that place increases  if something is returned to a place then the amount of that something in that place increases & days is when a decomposer recycles / dna vehicle / antinitrogen from survivor asteroids to the sand by fast those survivor wing ->  decomposition of dead organisms increases the amount of nutrients / nitrogen in soil  high amounts of nutrients / nitrogen are important for the formation of fertile soil & decomposition of dead organisms increases the amount of nutrients / nitrogen in soil ->  decomposition of dead organisms is important for the formation of fertile soil  decomposition of dead organisms is important for the formation of fertile soil & a vegetable is a mean of atom -> plant decomposition is important for the formation of fertile soil