TY  - RPRT
TI  - Improving nitrogen efficiency: lessons from Malawi and Michigan.
AU  - S Snapp
AU  - H Borden
AU  - D Rohrbach
PY  - 2001
DO  - 10.1100/tsw.2001.307
UR  - https://pubmed.ncbi.nlm.nih.gov/12805780/
ID  - 12805780
ER  -