TY  - BOOK
AU  - JOhn L. Havlin.
TI  - Soil fertility and fertilizers: an introduction to nutrient management 
SN  - 8178088630
U1  - 631.42 22
PY  - 1999///
CY  - New delhi
PB  - pearson
KW  - Soil fertility
KW  - Fertilizers
N1  - Includes indexs
ER  -