TY  - BK
AU  - El-Attar,H.
AU  - El-Haddad,E.
AU  - El-Halfawi,M.
TI  - Response of maize to farmyard manure and zinc
KW  - Carbonates
KW  - Chemical soil types
KW  - Farmyard manure
KW  - Iron
KW  - Manganese
KW  - Manures
KW  - Micronutrient fertilizers
KW  - Organic matter
KW  - Zinc
KW  - AGROVOC
KW  - Zea mays
KW  - Yields
N1  - Tables, references p. 224
ER  -