wheat, oatmeal and corn.
They grew most of the crops that are grown today with the exception of:Wheat (which originated in the Middle East)Tomatoes (which originated in South America)Hemp (which is now illegal in the US, and it was not used for smoking)
There is no "most important element" for corn. However, the nutrient which is most used up by the corn crop, and therefore costs the most for the the farmer to replace is nitrogen. No element is more important than any other because if any one nutrient, even a micronutrient, is completely missing, there will be no crop to harvest.
Yes.
Corn has is being used for trade. Also, for food.
In the US, corn is the most produced food crop. Corn a major food used for livestock.
Iowa is the largest producer of corn in the US.
In Iowa.
As of 2011, approximately 45% of US corn production is being used for ethanol production.
monsanto
Iowa
corn
Iowa
Approximately 38% of corn produced in the US is used for ethanol production.
Throughout the mid-west of the US, but corn can grow in most of the places where it is wet enough.
Iowa
Candy corn.