TY  - BK
AU  - Hayami,A.
TI  - Cropping sequences and their effect on soil fertility
U1  - 76-056145 
PY  - 1975///
CY  - Taiwan (China)|Taipei (Taiwan)
PB  - ASPAC|FFTC, 
KW  - Fertilizers
KW  - AGROVOC
KW  - Soil fertility
ER  -