TY  - BOOK
AU  - Gustafson A.F.
TI  - Soils and soil management
SN  - 8177540688
AV  - S591 .M675
U1  - 631.422 
PY  - 2004///
CY  - New Delhi
PB  - Agrobios (India)
KW  - Soil fertility
N1  - Includes bibliography
ER  -