Over time, the agricultural industry is realizing more and more about the positive effect of sulphur as a fertilizer nutrient in itself. Usually, plants need about a tenth as much sulphur as nitrogen, but sulphur deficiencies limit plant growth as certainly and severely as nitrogen deficiencies do. Reduced yield is the result of sulphur fertilizer deficiency at any stage of plants’ growth.
Previously sulphur deficiency was not a big concern on most of the soils as a large amount of organic sulphur was available. As time passes, the amount of organic sulphur has declined significantly because it was mostly used by crops, especially high sulphur-consuming plants including alfalfa and canola. Sulphur deficiency usually occurs on sandy soils, low organic matter soils and high sulphur-using crops. Sulphur uptakes of several crops are mentioned bellow. As seen on the table, canola and alfalfa are high sulphur-consuming crops.
organic sulfur fertilizer sources
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