premise: high quality / rich / good soil has a high number of nutrients / amount of nitrogen sent2: to have a negative impact on something means to negatively affect that something sent3: fertility is a property of soil that describes how fertile the soil is sent4: plants are a kind of organism sent5: soil provides nutrients for plants sent6: fertile soil is high in quality sent7: if a living thing requires something then that something has a positive impact on that living thing sent8: organisms are a part of an environment sent9: a plant requires soil for survival / to grow.
hypothesis: overproduction of corn can negatively affect the environment by decreasing soil fertility