TY  - GEN
AU  - Havlin, John L. 
AU  - Nelson, Werner L.
AU  - Beaton, James D.
AU  - Tisdale, Samuel L.
TI  - Soil fertility and fertilizers: an introduction to nutrient management
SN  - 0136268064
U1  - 631.422 
PY  - 1999///
CY  - New Jersey
PB  - Prentce Hall
KW  - Soil fertility
ER  -