TY  - BOOK
AU  - 
AU  - Kropff,M J et al.
TI  - Modelling crop weed interactions
SN  - 0851987451
U1  - 632.5 
PY  - 1993///
CY  - United Kingdom
PB  - CAB international
KW  - Agronomy
KW  - competition for nitrogen
ER  -