Soil and Fertilizer Management for Vegetable Production in Florida
- Covers soil and fertilizer management practices in Florida. From the University of Florida.
- http://edis.ifas.ufl.edu/CV101

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.
- http://www.extension.umn.edu/distribution/cropsystems/DC5886.html

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.
- http://www.hri.ac.uk/enveg/