TY  - BK
AU  - Couper,D.C.
TI  - Use of graded contour banks for soil conservation
T2  - IITA Research Guide
PY  - 1995///
CY  - Ibadan (Nigeria)
PB  - IITA, 
KW  - Contour cultivation
KW  - Cultural methods
KW  - Erosion control
KW  - Soil conservation
KW  - IITA
ER  -