Fertilizer Advisory Development and Information Network for Asia and the Pacific Information on fertilizer use, production and consumption. http://www.fadinap.org/index.html

Fertiliser Deficiencies Papers describing deficiency symptom in crops and field vegetables. http://www.msue.msu.edu/msue/imp/modf1/modf1d.html

Soil Fertilizers Information with regard to soil pH, fertilizers and lime application. http://www.ncw.wsu.edu/lime.htm

Soil Fertility Guide Common fertilizers and their characteristics. http://www.gov.mb.ca/agriculture/soilwater/soilfert/fbd02s10.html

Sugar Cane Production and Soil Fertility. Information on the relationship between the quality of sugarcane and soil fertility. http://www.cipav.org.co/lrrd/lrrd7/2/9.htm

Soil Fertility Answers questions related to the enhancement and maintenance of soil fertility. http://www.seafriends.org.nz/enviro/soil/fertile.htm

Fertilizers, Soil fertility, Plant Nutrition Information on all aspects of soil fertility and fertilizers. http://www.agnet.org/library/list/subcat/E.html

How to Apply Fertilizer to Wheat Application time, forms of fertilizer and methods of application to be considered when applying fertilizer to wheat. http://www.ianr.unl.edu/pubs/FieldCrops/g889.htm

Soil Fertility Implications Describes the different fertilization requirements for direct seeding. http://www.agric.gov.ab.ca/agdex/500/1900010.html

Soil test interpretations Gives examples of soil test values and explains their significance. http://www.cahe.nmsu.edu/pubs/_a/a-122.html

NPK Plant Nutrient Models Online programs that simulate the response of crops to fertilization, crop residue incorporation and consider the effects of time, soil type, cultural practice and weather. Downloads available for researchers. http://www.qpais.co.uk/npk/infoindx.htm

Chloride Crop Nutrition Essential nutrient for plant growth. Testing for deficiencies and effects on plant growth. Effect on plant diseases. http://www.ppi-far.org/chloride/index.html

What is Soil Fertility Information about soil fertility and how it can be improved. http://www.dnagardens.com/what_is_soil_fertility.htm

The International Fertiliser Society Scientific, technical, environmental, economic and safety aspects of the production, marketing, use and application of fertilizers. http://www.fertiliser-society.org/

Getting Back to Basics Crop information for all US regions and information on soil fertility and fertilizer application. http://www.back-to-basics.net

European Fertilizer Manufacturers Association Contains details about plant nutrient requirements, recommendations for fertilizer use and best agricultural practices for fertilizer application. http://www.efma.org/index.asp

International Fertilizer Industry Association Describes the production, distribution and consumption of fertilizers, their intermediates and raw materials http://www.fertilizer.org/

International Fertilizer Development Center Production and agronomic effectiveness of fertilizers. http://www.ifdc.org/

European Network for Field Vegetable Crops Environmental problems associated with the nitrogen fertilization of field grown vegetables. http://www.hri.ac.uk/enveg/

Fertiliser Manufacturers Research Association Aims to promote and encourage responsible fertilizer use. Contains many fertilizer fact sheets. http://www.fertresearch.org.nz/