I thought this article was good in that it had some differing opinions in it and was more objective than some of the articles I've seen on the web (which are usually either adamantly for or against organic growing of crops).
You farmers and gardeners out there (Karen, Verna) might be interested in this.
OEFFA is 'The Ohio Ecological Food & Farm Association'
Nutritive Value of Organic Foods: A Closer Look
(OEFFA announcement of an inaccurate article about superiority of organic foods)
This is a copy of the inaccurate article
While misrepresented, this article does seem to be based on some actual research.
Followup OEFFA article and discussion
About OEFFA (source of above articles)