Underground crops :
HORTON, Douglas E.
Underground crops : long-term trends in production of roots and tubers Douglas Horton - Morrilton Winrock International 1988 - 23 p.
Includes bibliographical references
9780933595194
Root crops--Statistics
Root crops--Yields--Statistics
Underground crops : long-term trends in production of roots and tubers Douglas Horton - Morrilton Winrock International 1988 - 23 p.
Includes bibliographical references
9780933595194
Root crops--Statistics
Root crops--Yields--Statistics