TY  - BOOK
AU  - Laegreid, M., ed.
AU  - Bockman, O.C., ed.
AU  - Kaarstad, O., ed.
TI  - Agriculture, fertilizer and the environment
SN  - 9780851993584
PY  - 1999///
CY  - Wallingford
PB  - CABI Publishing
ER  -