TY  - BOOK
AU  - Whitehead, D. C.
TI  - Grassland nitrogen
AV  - S667.G7W71 
PY  - 1995///
CY  - Wallingford
PB  - CAB International
KW  - Nitrogen
KW  - Fixation
KW  - Fertilizers
KW  - Soils
N1  - Includes index
ER  -