TY  - BOOK
AU  - Beek, J.
TI  - Simulation of nitrogen behaviour in soils
T2  - Simulation monographs
U1  - 631.411 
PY  - 1973///
CY  - Wageningen
PB  - Centre for Agricultural Publishing and Documentation
KW  - Suelos
KW  - Nitrógeno en
ER  -