TY  - BOOK
AU  - Nielsen, D. R,
AU  - MacDonald, J. G.,
TI  - Nitrogen in the Environment Vol. 2 Soil -Plant -Nitrogen Relationship
SN  - 0125184026
U1  - 631.84 
PY  - 1978///
CY  - London
PB  - Academic Press
KW  - Nitrogen
ER  -