Nitrogen (N), phosphorus (P) and potassium (K) are critical components of a well-fertilized crop. But to achieve yields and more nutritious foods, crops need sulphur (S). This website is an introduction to sulphur and its important role in agriculture.
Sulphur is one of the 17 essential plant nutrients. It is essential for the growth and development of all crops, without exception. Like any essential nutrient, sulphur also has some key functions in plants:
The Sulphur Institute has recently increased programming promoting the use and importance of sulphur fertilizers. TSI staff has conducted interviews and developed print materials supporting this message. Click here to read more.
Sulphur deficiency symptoms resemble nitrogen deficiency: the leaves become pale-yellow or light green. Unlike nitrogen, sulphur-deficiency symptoms appear first on the younger leaves, and persist even after nitrogen application. Click here to read more.
While soil tests for sulphur deficiency indicate the likelihood that a crop grown on that soil will benefit from or respond to sulphur application, the real proof is when on such soils, sulphur application actually increases crop yield. Click here to read more.
Most sulphur-containing fertilizer materials generally can be divided into four groups: 1) fertilizers containing sulphate, 2) fertilizers containing elemental sulphur, 3) fertilizers containing a combination of sulphate and elemental sulphur, and 4) liquid sulphur fertilizers. Click here to read more.
Click here to learn more about the other activities of TSI's Information and Advocacy working group