TY  - GEN
AU  - Plucknett, Donald L. 
AU  - Sprague,Howard B.
TI  - Detecting mineral nutrient deficiencies in tropical and temperate crops 
SN  - 8170891337
U1  - 631.4 
PY  - 1989///
CY  - Dehra Dun
PB  - International Book Distributors
KW  - Soil science
KW  - Specific techniques; equipment, materials
ER  -