TY  - BOOK
AU  - John L.Havlin
AU  - James D.Beaton, Samuel L.Tisdale Werner L.Nelson
TI  - Soil Fertility And Fertilizers / 7 Th Edn
SN  - 9788120330177
U1  - 631.42  H 2998 S 
PY  - 2011///
PB  - PHI Lerarning (New Delhi) 
KW  - Soil Science
ER  -