BEN GUERIR, Morocco — Moussa Bouray sifts through hundreds of soil samples on the shelves of his lab that that will undergo analysis for nutrients: nitrogen, potassium, and especially phosphorus. Outside the lab at Mohammed VI Polytechnic University, mounds of phosphate sediment from a nearby mine rise so high they resemble mountains in the distance. … Continue reading Morocco rolls out a phosphorous-fueled plan to heal soils across Africa