Fertiliser requirements of vegetable crops /
Greenwood, Davydd J.
Cleaver, T. J.
Turner, Mary K.
Gervy, Roger.Maize and its fertilisation.
Fertiliser Society.
London : Fertiliser Society,
[1974]
"Presented to the Fertiliser Society of London on 19th December, 1974."
Includes bibliographies.
Vegetables
Corn