Professor Dan Sullivan from Oregon State University, recently arrived to Romania, at the University of Agricultural Sciences and Veterinary  Medicine in Cluj-Napoca for a 9-months project on  Nutrient Management Practices for Sustainable Agriculture and Enhanced Environmental Quality in Romania. See his material of a general information prepared by him for his professional group back home at: https://t.e2ma.net/webview/sidnm/037445adb0023b9570a5825578094dd0