TY  - BOOK
AU  - Bontkes, T.E. Struif.
AU  - Wopereis, M. C. S.
TI  - Decision support tools for smallholder agriculture in Sub-Saharan Af rica: a practical guide 
SN  - 088090142X
U1  - 631.4 
PY  - 2003///
CY  - Wageningen, Netherlands
PB  - CTA
KW  - Soil fertility
KW  - Fertilizers
KW  -  Africa, Sub-Saharan
KW  - Soil management
N1  - Includes bibliographical references
ER  -