Top Nations, According to Citations, in the Agricultural Sciences. (March 4, 2011)

Based on citation data from Thomson Reuters' Essential Science Indicators, Times Higher Education has published the table reprinted below showing the mean number of citations per agricultural sciences paper adjusted for "impact".

As a TFW reader has noted there is no indication as to what scale, if any, was used to take into the account the years between when the paper was published and when the THE's tabulation was done.