TY  - BOOK
AU  - Nielsen, Donald R., ed.
TI  - Nitrogen in the environment
T2  - vol.2 : Soil-plant-nitrogen relationships
U1  - 631.461.5(082.2) L8.1;1-2 
PY  - 1978///
CY  - New York
PB  - Academic Press
KW  - Edited  by Donald R.Nielsen (and) J.C.MacDonald
KW  - Nitrogen
ER  -