TY  - BK
AU  - Aldrich,S.R.
TI  - Nitrogen in relation to food, environment, and energy
PY  - 1980///
CY  - Urbana-Champaing, IL (USA)
PB  - Agricultural Experimental Station, College of Agriculture, University of Illinois at Urbana-Champaign
KW  - AGROVOC
KW  - Nitrogen
KW  - Nitrogen fertilizers
KW  - Food production
ER  -