ENVEG - Nitrogen for Vegetables: This is a European network representing fifteen countries set up to provide a forum for exchange of research information. Research findings on how to improve techniques of nitrogen fertilization are shared with researchers, industry and governments.
Nutrient Management for Commercial Fruit & Vegetable Crops in Minnesota: Provides guidelines for economically and environmentally sound use of fertilizers in commercial fruit and vegetable production. From the University of Minnesota.
Soil and Fertilizer Management for Vegetable Production in Florida: Covers soil and fertilizer management practices in Florida. From the University of Florida.