We noticed that the [list_soils function retrieves a different ranked soils list than rank_soils](https://github.com/techmatters/soil-id-algorithm/issues/126). As it turns out, ranked_soils uses slope (either the user entered slope, or slope from a secondary source as a fallback). This begs the question, does including secondary slope data improve list_soils? ## Acceptance Criteria - [ ] Using our training data sheet, compare the results between including and not including slope data - [ ] Make recommendations for changing list_soils and rank_soils on the basis of research