Prithee, goodman - what is this "korn" of which you speak?
About 300 years later iirc. And one of the main advantages were that its production was much greater/acre than other crops.
Korn is korn of course? :mrgreen:
The common mans diet in medieval times. From the word "sädeskorn" which translates to "grain" pretty much(or potentially as "seedgrain" if taken a bit too literally).
"Later" becoming the name of a particular type of grain which you perhaps know as barley.
Also translatable as particle and bead, and in transferred meaning, crumb.
"Corn" is the correct term for any cereal crop ("corn" simply means seed or grain in Old English). Cognates are found in many languages throughout Europe in the thirteenth century, and still used that way in modern English.
Around the end of the sixteenth century, Colonials started to refer to maize as "Indian corn", and the word was appropriated in American usage to mean just maize in the modern era. Just because the US has a more restricted use of the term, it doesn't mean that the rest of the world is wrong 
Mark