From the University of Delaware Cooperative Extension. Agronomy Gleanings Read compilations of articles for the past three years. Topics cover a wide range, including pest damage, weed control, row spacing, herbicides, etc. This site from Purdue has extensive documents of interest to agronomists. Topics include conservation tillage, the national corn handbook, weeds, and much more.
Documents are available in html format.
Agronomy Publication Listing A nice list of publication on agronomy. Includes fertilizers, soils, seed, cotton, insects, and other topics. In pdf format. From New Mexico State University. University of Kentucky Publications offered include general agronomy, soil science, variety test files, and pest news.