TY  - GEN
AU  - Smaling, E.M.A
AU  - Fresco, L.O
AU  - Oenema, O
TI  - Nutrient disequilibria in agroecosystems concepts and case studies
SN  - 0851992684
U1  - 577.55 
PY  - 1999///
CY  - Oxon
PB  - CABI
KW  - AGRICULTURAL ECOLOGY
KW  - Plant nutrients
ER  -