TY  - BOOK
AU  - Greenland,D.J.
AU  - Lal,R.
TI  - Soil physical properties and crop production in the tropics
SN  - 0471997579
U1  - 631.43 
PY  - 1979///
CY  - New York
PB  - John Wiley, 
KW  - COSECHAS
KW  - RENDIMIENTO
KW  - FISICA DE SUELOS
KW  - SUELOS
ER  -