TY - RPRT TI - Long-term Mississippi River trends expose shifts in the river load response to watershed nutrient balances between 1975 and 2017 AU - Sarah M. Stackpoole AU - Robert D. Sabo AU - James A. Falcone AU - Lori A. Sprague PY - 2021 DO - 10.1029/2021wr030318 UR - https://pubs.usgs.gov/publication/70226207 ID - 70226207 ER -