February 2000 Articles
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Sulfur Increases Yields
By Randy Simonson, Ph.D.
Technical Services Manager
Sulfur is a secondary nutrient required by plants. More and more research plots are showing positive yield responses with sulfur. Last year a trial was conducted on canola in Wisconsin. Canola has been grown by Canadian farmers for a long time, but is gaining popularity in the U.S.
Soil samples were taken prior to planting and the sulfur level in the soil was at 2.5 ppm. The University of Wisconsin does not recommend supplemental sulfur at this level. However, the yield response to adding 20 lbs sulfur/acre was significant. The sulfur treatment produced 1370 lbs canola/acre, whereas the control only yielded 1170 lbs/acre. This is a 17 % increase in yield.
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