Soil Fertility and Fertilizers Websites

Explains how to detect and combat iron deficiency in plants.

Aims to promote and encourage responsible fertilizer use. Contains many fertilizer fact sheets.

Answers questions related to the enhancement and maintenance of soil fertility.

Scientific, technical, environmental, economic and safety aspects of the production, marketing, use and application of fertilizers.

Describes the production, distribution and consumption of fertilizers, their intermediates and raw materials

Production and agronomic effectiveness of fertilizers.

Abstract from a university lecture describing the physical and chemical effects of liming on different soil types.

Agricultural use and the environmental impact of fertilizer, lime and soil amendments.

Indian Agricultural Resources. Information about manures, organic, inorganic and biofertilizers.

Describes the results of a long-term field experiment in Sweden. By Artur Granstedt and Lars Kjellenberg.

Research findings and practical technologies that help conserve and improve soil conditions. Applicable to farming, ranching, forestry and gardening.

Magnesium/sulphur deficiency symptoms are widespread due to inappropriate nutrient management. This website offers not only details about the origin, properties and production of Kieserite, but also a wide range of information concerning its importance and possibilities of use in agriculture.

The Ontario Ministry of Agriculture, Food and Rural Affairs offers a large collection of newsletters and factsheets with topics ranging from soil sampling to fertilizer requirements and micronutrients.

Describes important soil tests and explains how to perform and interpret them.

Describes the fertilizer requirements of different soil types, with particular reference to Alberta.

Provides general guidance on the purchase, use and timing of nitrogenous fertilizers and on the application of phosphorus, potassium and sulphur.

Information about soil fertility and how it can be improved.

Provides a number of downloadable publications on various aspects of soil management, provided by the NSW Department of Primary Industries.

Fertilizer calculator and fertilizer management tool, providing guidance on fertilizer recipes, cost analysis and fertilizer mixes.

Self supporting lab at New Mexico State University providing chemical testing for plants and soils.

Application recommendations for different fertilizers.

Organization aiming to provide science-based information to help educate people about the benefits of fertilizer. Includes information for consumers, students, teachers and grassroot activists.

A large collection of information ranging from soil test interpretation to prevention of nutrient deficiencies.

Gives examples of soil test values and explains their significance.