TY  - BOOK
AU  - Havlin ,J.L
AU  - Havlin,John
TI  - Soil fertility and fertilizers: an introduction to nutrient management 
SN  - 0130278246
AV  - S633.S715 2005
PY  - 2005///
CY  - New Jersey 
PB  - Pearson Prentice Hall
KW  - Fertilizers
KW  - Soil fertility
KW  - Crops
KW  - Nutrition
ER  -