CORN as a major source of starch is used as feed grains. There are varieties of Yellow Maize that are used as a feed or non-feed (paint, cosmetics and...) and is a standard component of livestock diets.

The energy resource of corn is so high that other grain are typically compared with it for estimating their nutritional value.

Corn like all cereal grains is composed of carbohydrates, and starch is its main carbohydrate, comprising to 80% of its dry weight. There are different types of corns with different sugar content. However despite of its sugar content it is not a high glycemic food.

Corn is named as "Yellow gold" because of its daily usage to make many products and byproducts. There is also many industrial products like pharmaceuticals, fuel ethanol and recyclable plastics.

In spite of multitude ways of its usage, here but it is important for us because of its role as animal feed. What is the difference between sweet corn and field corn? The farmers leave corn in the fields to die and it is handled completely different than sweet corn, because drying in the fields is an important part of harvest. These two types of corn are closely related but they aren't exactly the same. The taste, color and other stuffs are different. Field corn is taller and the leaves are fuller than the ones in sweet corn which is shorter and looks spindly. In dry years the sweet corn gets shorter than normal.

About the field corn we should mention that it's not as sweet as other type so it doesn't taste good. It will be processed into corn meal or corn flour. As usual some field corn is used as seed for next year's crop and is called seed corn.

Field corn is harvested later than sweet corn and the goal is to dry it while it is still on the ears. How they find out if it's dry or not? The silks at the top turn to brown and next other parts turn to dark brown and finally the ear falls so that the silks are pointed at the ground.