What is the offering of the first-fruits required to be?

Answer From The Annual Reading Schedule - Week 23 Notes For Leviticus: Aviv (Leviticus 2:14). In the KJV it says the "meat offering" should be "green ears of corn" and in other versions it says "grain offering" should be "green heads of grain". The "green ears of corn" and "green heads of grain" is from the Hebrew word Aviv (Strong's # H24). The Ancient Hebrew Research Center Lexicon of the Bible defines Aviv simply as "Green Grain" with the longer definition of "The new green ears of growing grain as the parent seeds attached to the stalk (pole) of the next generation of crops. Also Abib, the name of a month in the Hebrew calendar." Aviv does not mean "Barley" but rather seems to be a stage of development of grain in general according to this definition. The Hebrew word for Barley is "Se'orah" (Strong's # H8184).