Chloride Crop Nutrition
Essential nutrient for plant growth. Testing for deficiencies and effects on plant growth. Effect on plant diseases.
Fertilizer and Lime Research Center, New Zealand
Agricultural use and the environmental impact of fertilizer, lime and soil amendments.
Fertilizers, Soil fertility, Plant Nutrition
Information on all aspects of soil fertility and fertilizers.
Food and Fertilizer Technology Centre
Technical information and practical experiences about agricultural food production and the use of fertilizers.
International Fertilizer Development Center
Production and agronomic effectiveness of fertilizers.
International Fertilizer Industry Association
Describes the production, distribution and consumption of fertilizers, their intermediates and raw materials
Manures and Fertilizers
Indian Agricultural Resources. Information about manures, organic, inorganic and biofertilizers.
Phosphorus and potassium
Describes the phosphorus (P)and potassium (K) soil testing and fertilizer recommendation system in Ontario, Canada.
Preplant Soil Nitrate Tests
Description of tests that allow farmers to adjust nitrogen applications to meet the needs of each specific field.
Recommended soil testing procedures
Describes important soil tests and explains how to perform and interpret them.
Soil Fertility
Answers questions related to the enhancement and maintenance of soil fertility.
Soil fertility and crop nutrition
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 requieremen…
Soil Fertility Establishment
Soil fertility management for forage crops. A introduction from the Penn State University's Agronomy Department.
Soil Fertility for Forage Crops
Gives detailed description of the soil and fertilizer requirements of forage crops during establishment and maintenance. University of Pennsylvania.
Soil Fertility Guide
Soil fertility practices in Manitoba and general fertilizer use considerations. Details about fertilizers, their characteristics, application rates and usage recommendations. N-fix…
Soil Quality Institute (SQI)
Research findings and practical technologies that help conserve and improve soil conditions. Applicable to farming, ranching, forestry and gardening.
The International Fertiliser Society
Scientific, technical, environmental, economic and safety aspects of the production, marketing, use and application of fertilizers.
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