The 'EA' refers to the quantity, but all have been deleted. We sincerely apologize for the basic mistake. We will check in more detail later. We reviewed the literature review and deleted redundant or unnecessary content. Also, we have checked and corrected the Author's initials that you pointed out. We also Cognized that the expression ‘EA’ is a unit used only in certain countries.
The literature review is very long (it represents half of the paper) and can be significantly shortened as it contains few information that is actually useful to the rest of the paper. It is also hard to read, as it contains more tabular content than text. In Table 3, what is an EA?