Fig. 4: Relationship between April+May nitrate load of the UMRB and May nitrate load of the MRB and the size of the hypoxic zone in the GOA.
From: From basin to gulf: Conservation tillage improves soil health but exacerbates hypoxia
a Correlation between April+May nitrate load of the UMRB and May nitrate load of the MRB. b Relationship between April+May nitrate load of the UMRB and the size of the hypoxic zone of coastal waters near the Mississippi River delta.
