TY  - BK
AU  - Schmidt,G.
AU  - Frey,E.
TI  - Crop rotation effects in savannah soil at the Nyankpala agricultural experiment station
T2  - Nyankpala Agricultural Research Report
SN  - 3-8236-1159-3
U1  - 338.1 
PY  - 1988///
CY  - Tamale (Ghana)
PB  - Crops Research Institute, 
KW  - Climate
KW  - Experiments
KW  - Fertilizer application
KW  - Legumes
KW  - AGROVOC
KW  - Savannas
KW  - Soil conservation
KW  - Soil deterioration
KW  - Trials
KW  - Rotational -
KW  - Término tomado de AGROVOC
KW  - Zea mays
KW  - Farming systems
N1  - Tables, references p. 37
ER  -