TY  - BOOK
AU  - Roy,Rabindra N
ED  - Food and Agriculture Organization of the United Nations.
TI  - Assessment of soil nutrient balance: approaches and methodologies 
SN  - 9251050384
PY  - 2003///
CY  - Rome
PB  - FAO
KW  - Soil fertility
KW  - Crops
KW  - Nutrition
KW  - Crops and soils
N1  - Includes bibliographical references (p.83-87); Open access
ER  -