TY  - GEN
AU  - Havlin , L John
AU  - Beaton , D James 
AU  - Tisdale , L Samuel 
AU  - Nelson ,  L  Wernerl 
TI  - Soil fertility and fertilizers
SN  - 8178088630
U1  - 631.422 
PY  - 2003///
CY  - Delhi
PB  - Pearson education
KW  - SOIL
ER  -