TY  - BOOK
AU  - Follett, Ronald F.
TI  - Soil fertility and organic matter as critical components of production systems: : proceedings
T2  - SSSA Special publication
U1  - 631.45 
PY  - 1987///
CY  - Madison
PB  - Soul Science Society of America
KW  - Humus
KW  - Suelos
KW  - Fertilidad
KW  - Materia orgánica
ER  -