TY  - BOOK
AU  - Havlin, John L. and others,
TI  - Soil Fertility and Fertilizers : An Introduction to Nutrient Management
SN  - 0136268064
U1  - 631 
PY  - 1999///
CY  - New Jersey
PB  - Prentice - Hall, Inc.
KW  - Soil Fertility
KW  - Techniques, equipment & materials
ER  -