soil fertility and fertilizers

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• - 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.
  
• - Indian Agricultural Resources. Information about manures, organic, inorganic and biofertilizers.
  
• - Soil fertility management for forage crops. A introduction from the Penn State University's Agronomy Department.
  
• - 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 an
  
• - Information on the relationship between the quality of sugarcane and soil fertility.
  
• - Information about soil fertility and how it can be improved.
  
• - Frequently asked questions about soil fertility, the application of animal wastes, organic and chemical fertilizers. Also features an online discussion forum.
  
• - Scientific, technical, environmental, economic and safety aspects of the production, marketing, use and application of fertilizers.
  
• - Papers describing deficiency symptom in crops and field vegetables.
  
• - Information with regard to soil pH, fertilizers and lime application.
  
• - This site from the Manitoba Agriculture, Food and Rural Initiatives offers advice and information about the management and fertility of soil. Includes erosion, salinity and soil surveys.
  
• - Technical information and practical experiences about agricultural food production and the use of fertilizers.
  
• - A number of bulletins describing soil analysis, soil types and fertiliser application.
  
• - Soil fertility practices in Manitoba and general fertilizer use considerations. Details about fertilizers, their characteristics, application rates and usage recommendations. N-fixation, Manure and soil factors are also described.
  
• - A series of reports describing the effects of various micronutrients on the growth and health of plants. Pictures of plants with deficiency symptoms.
  
• - The influence of potassium on plant nutrition and soil.
  
• - The Ontario Ministry of Agriculture and Food offers a large collection of newsletters and factsheets with topics ranging from soil sampling to fertilizer requierements and micronutrients.
  
• - Crop information for all US regions and information on soil fertility and fertilizer application.
  
• - Describes important soil tests and explains how to perform and interpret them.
  
• - Lectures and Laboratory Units of the Soil Sciences Courses at the University of Minnesota. Influences on soil fertility are explained and simple soil tests are described.
  
• - Introduction to the sources of, and the uses of foliar fertilizer.
  
• - Lectures about soil surveys, soil texture, soil acidity and soil fertility. Information about liming, fertilization and soil testing with particular reference to forestry.
  
• - A large collection of information ranging from soil test interpretation to prevention of nutrient deficiencies.
  
• - Description of tests that allow farmers to adjust nitrogen applications to meet the needs of each specific field.
  
• - Gives examples of soil test values and explains their significance.
  
• - Describes the results of a long-term field experiment in Sweden. By Artur Granstedt and Lars Kjellenberg.
  
• - Essential nutrient for plant growth. Testing for deficiencies and effects on plant growth. Effect on plant diseases.
  
• - A student paper describing soil conditions in forests. Particularly what causes the pH to change and what influences this will have on the ecosystem.
  
• - Describes the production, distribution and consumption of fertilizers, their intermediates and raw materials
  
• - Contains details about plant nutrient requirements, recommendations for fertilizer use and best agricultural practices for fertilizer application.
  
• - Describes the different fertilization requirements for direct seeding.
  
• - Application time, forms of fertilizer and methods of application to be considered when applying fertilizer to wheat.
  
• - A program by PotashCorp to address misconceptions about fertilizers and the role of the fertilizer industry. Detailed description of fertilzer use and production. Many downloads and a quiz.
  
• - Gives detailed description of the soil and fertilizer requirements of forage crops during establishment and maintenance. University of Pennsylvania.
  
• - Background information on the role of sulphur in soil fertility, sulphur containing fertilizers and explanation of the results of a soil test.
  
• - Information about university research with extensive list of publications.
  
• - A detailed description from the International Centre for Integrate Mountain Development. Its main focus is on mountain soils and sloped agriculture in th Hindu-Kish region.
  
• - Simple step by step guide to soil sampling and analysis with explanatory images.
  
• - Information on fertilizer use, production and consumption.
  
• - Comprehensive online book about proper fertilizer uses, soil pH and soil sampling.
  
• - Institute of the University in Denmark. Features publications and research reports.
  
• - Educational site for students and teachers about soil and soil biology.
  
• - Aims to promote and encourage responsible fertilizer use. Contains many fertilizer fact sheets.
  
• - Provides publications and educational material.
  
• - Production and agronomic effectiveness of fertilizers.
  
• - A university lecture describing the physical and chemical effects of liming on different soil types.
  
• - Measures to improve soils suited to farmers in the third world.
  
• - Offers a database and search function of a range of articles about fertilizers, micronutrients and fertilizer application.
  
• - Agricultural use and the environmental impact of fertilizer, lime and soil amendments.
  
• - Explains how to detect and combat iron deficiency in plants.
  
• - On the deficiencies that may occur in soilless floriculture, and how these can be remedied.
  
• - Describes the effective use of this fertilizer. Soil availability, fertilizer characteristics and application.
  
• - Information on all aspects of soil fertility and fertilizers.
  
• - Describes the phosphorus (P)and potassium (K) soil testing and fertilizer recommendation system in Ontario, Canada.
  
• - Environmental problems associated with the nitrogen fertilization of field grown vegetables.