premise: high quality / rich / good soil has a high number of nutrients / amount of nitrogen sent2: planting crops is a kind of activity sent3: soil contains nutrients for plants sent4: a plant / living thing requires nutrients to grow sent5: if something requires something else then that something relies on that something else sent6: planting crops requires growing crops sent7: planting is a kind of human action sent8: crops are a kind of edible plant for eating.
hypothesis: growing crops is a kind of human activity that relies on high quality soil to grow