TY  - BOOK
AU  - Van Straaten,Peter
TI  - Rocks for crops: agrominerals of sub-Saharan Africa 
SN  - 0889555125
AV  - S633.5 S71
PY  - 2002///
CY  - Nairobi, Kenya, Guelph, Canada
PB  - University of Guelph
KW  -  
KW  - Soil fertility
KW  - Africa, Sub-Saharan
KW  - Phosphatic fertilizers
KW  - Phosphate rock
KW  - Minerals in agriculture
KW  - Soil management
KW  - Fertilizantes fosfatados
KW  - larpcal
KW  - Fertilidade do solo
KW  - Manejo do solo
KW  - Mineralogia do solo
N1  - Includes bibliographical references and index
ER  -