TY  - BOOK
AU  - Havlin, John L;  .
AU  - Beaton,James D;  .
AU  - Tisdale,Samuel L  .
TI  - Soil fertilty and fertilizers: An introduction to nutrient management / 
SN  - 9788120330177
U1  - 631.8 
PY  - 2003///
PY  - 2009///
CY  - Singapore : , New Delhi
PB  - Pearson Education Asia , , Prentice Hall of India
ER  -