TY  - BK
AU  - Follett,R.F.
ED  - Symposium by Division S-4, S-2 and S-8 of the Soil Science of America
TI  - Soil fertility and organic matter as critical components of production systems
T2  - SSSA Special Publication
SN  - 0-89118-782-0
U1  - 631.422 
PY  - 1987///
CY  - Madison WI (USA)
PB  - SSSA, ASA, 
KW  - Climatic soil types
KW  - Crop management
KW  - AGROVOC
KW  - Cropping systems
KW  - Erosion control
KW  - Humus
KW  - Models
KW  - Nitrogen fixation
KW  - Nutritive value
KW  - Organic matter
KW  - Plant nutrition
KW  - Soil conservation
KW  - Soil management
KW  - Soil testing
KW  - Crop residues
KW  - Soil fertility
KW  - Tillage
KW  - Nitrogen fertilizers
N1  - Illustrations, tables, graphs, maps, bibliography
ER  -