TY  - BOOK
AU  - Onwueme,I.C.
TI  - Field crop production in tropical Africa : /b principles and practic e / 
U1  - 633.015096   21
PY  - 1991///
CY  - Netherlands : 
PB  - CTA Pub., 
KW  - Agriculture
KW  - Tropics
KW  - Crops
KW  - Tropical crops
N1  -  Includes bibliographical references (p.463-468)
ER  -