TY  - BOOK
AU  - Kirway,T.N.
TI  - Farming systems approaches:  : training manual Volume I
SN  - 9987-8970-2-9
AV  - EAF QTO S540.A2T34F37 
PY  - 2003///
CY  - Dar es Salaam
PB  - : Ministry of Agriculture and Food Security
KW  - Cropping systems,
KW  - Crop yields,
KW  - Developing countries,
KW  - Agriculture
ER  -