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The Use of Potassium Sulfate Fertilizer: Principles and Practices Print E-mail

SOP fertilizer is a valuable tool in crop management. SOP directly influences crop yield and quality, and also provides a balanced effect as a fertilizer solution. SOP nutrients play an important role in the development of proteins, enzymes and vitamins, as well as improving plant photosynthesis and growth. It is generally known that SOP is a product that can decrease the soil pH around the root surface, improving the uptake of phosphorus, iron, and other micronutrients. In sandy soils it can reduce leaching of cations such as calcium and potassium. In addition to enhance plant quality, SOP helps the plant to be more resistant to drought, frost, insects and many diseases.

SOP does not contain any nitrogen, allowing for a more effective and specific management of nitrogen and potassium fertilization. SOP improves yield and quality of high value crops, especially fruit trees, vegetables, and tobacco. It improves nutritional value, taste and appearance (size, color, and scent) but also fruit resistance to deterioration during transport and storage and its suitability for industrial processing.


The SOPIB Book contains the latest findings on the agronomic and economic advantages of sulfate of potash for a global agriculture. It reviews theoretical principles on the role K and S in soils and plant nutrition as well as practical advice on application methods. Thus, it is a valuable source of knowledge for a balanced fertilization of your crops.

This SOPIB book contains relevant information on K and S fertilization.
Chapter 1. Introduction and Summary: A brief description of the book content.
Chapter 2. Potassium in Soils: Summarizes K dynamics in the soil, forms and factors affecting K availability, and methods of soil testing to estimate K availability.
Chapter 3. Potassium in Plant Nutrition: Reviews plant uptake and functions of K in plant physiological processes, K interaction with other nutrients, stress signals, disease resistance, and plant deficiency diagnostic criteria.
Chapter 4. Sulfur in Soils: Describes S forms and processes involved on S availability in the soil. In addition, describes soil testing criteria to determine S deficiency.
Chapter 5. Sulfur in Plant Nutrition: Summarizes the role of S in plant physiology, deficiency symptoms and critical values in plant tissue.
Chapter 6. Principles on Balanced Fertilization: Condenses the importance of an adequate fertilizer management in crop production.
Chapter 7. Sulfate of Potash Fertilizers: Describes the extraction processes of SOP fertilizer and the grades as solid and soluble fertilizer for crop production.
Chapter 8. Use and Benefits of Sulfate of Potash Fertilizer: Reviews the benefits of using SOP fertilizer for high value crops and SOP fertilizers for chloride-sensitive crops.
Chapter 9. Use of Soluble Potassium Sulfate Fertilizers: Summarizes information in regards to delivery forms of soluble potassium fertilizer either as foliar or trough irrigation for an adequate plant nutrition.

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