TY  - BOOK
AU  - Lal, R..
TI  - Soil Physical Properties and Crop Production in the Tropics / 
SN  - 0-471-99757-9
U1  - J:1 
CY  - New york : 
PB  - John Wiley & Sons Ltd..
KW  - Agriculture <Crop Production in the Tropics>
ER  -