TY  - BOOK
AU  - Havlin, John L
TI  - Soil fertility and fertilizers : An Introduction to Nutrient Management
SN  - 812033017X
U1  - 631.422 
PY  - 2005///
CY  - New Delhi
PB  - Prentice Hall of India Pvt.Ltd.
KW  - science
ER  -