Scripting bulk user edit in AD

I have a Powershell script to modify the extensionAttribute2 attribute for a list of AD users (from a CSV).  How would I add a field to it?  If I wanted to update the Organization AD field with data in the second column of the CSV...is that possible?

Thanks,
Casey

Here's my current script:

Import-Csv C:\USER.CSV | %{
Set-ADUser -Identity $_.Name -replace @{extensionAttribute2="myValue"}
}

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