TY  - BOOK
ED  - Soil Science Society of America. Madison, Wis.
TI  - Soil fertility and organic matter as critical components of production systems
T2  - SSSA Special publication
U1  - 631.422 
PY  - 1987///
CY  - Madison
PB  - The Society
KW  - Humus
KW  - Congresos
KW  - Suelos
KW  - Fertilidad
KW  - Materia orgánica
ER  -