Essential Elements for Plant Growth


Sulfur deficiency in corn

Biological functions:

No toxicity to sulfate beyond salinity, S uptake beyond needs stored in part as sulfate. Deficiency symptoms are yellowing of whole plant, moderately phloem mobile. Response to S fertilizer in many crops and regions. With the reduction of sulfur at the smokestacks, agriculture may be losing the only benefit of acid rain!

Sulfur inputs to soil:

Sulfur outputs:

Soil Testing:

Water extract for sulfate; occasionally use CaCl2 or Ca(H2PO4)2 solutions in order to displace sulfate from anion exchange sites (if present). Captures existing sulfate levels, but does not account for sulfate losses due to leaching or accumulation from mineralization of organic-S.

Sulfur Fertilizers

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This page was last modified by Phillip Barak, Univ. of Wisconsin, on 5 Jan 1999. All rights reserved.