TY  - BOOK
AU  - Thorup, R M
TI  - Ortho agronomy handbook: a practical guide to soil fertility and fertilizer use
U1  - 631.8 
PY  - 1984///
CY  - San Francisco
PB  - Chevron Chemical Company Ortho Fertilizer Division 
KW  - Soil Fertility
KW  - Ortho Agronomy
KW  - Fertilizer Application
KW  - Secondary and Micronutrients
KW  - Properties of Fertilizers
ER  -