Sulfur, which has an orange hue, can be found in many water sources and underground veins throughout the world.
While sulfur, in its dry, flaky form, can be found in deposits underground and in some organic matter in the topsoil, it has also infused many underground streams and water sources. These water sources can be brought to the surface and used for irrigation or as a potable water source for human and livestock consumption. Sulfur in irrigation water can have a beneficial effect for the plants on which it is used. According to ALGreatLakes.com, "Sulfur is essential for plants," and "is important as a nutrient in irrigation water where there is low available sulfur from other sources."
Essential Functions
Sulfur is a necessary component of plant metabolism, root growth and structural formations in certain types of plants. Many of a plant’s elemental requirements can be met through the sulfur found in various organic forms in the topsoil where microbes break it down into more usable forms. However, especially in areas where soil sulfur levels are low, sulfur in irrigation water can be effectively used by crops for various essential functions.
Sulfur Deficiency
Plants that do not get regular amounts of sulfur, like the type found in irrigation systems, can suffer many ill health effects. These effects include poor or slower root growth and sallow coloration due to poor chlorophyll production. However, it is important to diagnose sulfur deficiency correctly, as its effects can also be confused with nitrogen deficiency. The difference can be determined in part by testing the soil. To aid in correcting this situation, sulfur can be added to irrigation water in systems where it is not already naturally present.
Dangers of Over-Irrigation with Sulfur
Dangers exist to using too much sulfur in irrigation. According to SpectrumAnalytic.com, too much sulfur can actually detrimentally affect the pH level of the soil in which crops are grown, and poor pH can cause many plants to wither and die. Additionally, over-irrigation can actually cause the sulfur already present in the soil not to be absorbed by plants, thus leading to a deficiency. The University of Missouri (Missouri.edu) recommends testing to determine the nutrient value of irrigation water and acceptable levels of elements such as sulfur. According to the site, "…It should not be difficult to have wells tested. Use a reputable private or public laboratory that specializes in water testing. If only crop nutrients (not pesticides) are analyzed, then the cost of water testing should be minimal."
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