Availability of Sulfur to Crops from Soil and Other Sources
Sulfur deficiencies in crops have increased worldwide because of decreases in sulfur inputs to the soil system and increases in sulfur outputs. This has made many crops vulnerable to yield reductions. The goal of soil and crop nutrient management systems is to make sure that there is an adequate, but not an excessive, amount of nutrients available to the growing crop. Excessive application of nutrients is not only inefficient but can negatively affect the environment. It is important to understand what limits sulfur availability to crops and the resources available to remove sulfur availability limitations. This chapter reviews sulfur inputs to soil and sulfur outputs from soil and how they affect sulfur availability to crops. General approaches and tests developed to measure the level of sulfur in soils that is available to crops and potential crop responses to inputs of fertilizer sulfur are also reviewed. Research needs to improve our ability to estimate soil-sulfur availability, and crop responses to sulfur fertilizer inputs conclude the chapter.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
Copyright © 2008. American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 5585 Guilford Road, Madison, WI 53711-5801, USA. Sulfur: A Missing Link between Soils, Crops, and Nutrition. Agronomy Monograph 50.