TY  - GEN
AU  - K. R. Krishna (ed.)
TI  - Soil fertility and crop production
SN  - 1578082153
PY  - 2002///
CY  - Enfield:  
PB  - Science Publishers
KW  - Soil fertility.
KW  - Crops - Effect of conpaction on
KW  - Crops and soils.
ER  -