Evaluation of a sprayable elemental sulfur fertilizer under field conditions in Alberta

Elemental sulfur (ES) fertilizers have high S content but may not be effective in the year of application due to the time required to oxidize. Rapid oxidation may be possible if the ES has a large surface area in contact with the soil. We evaluated the efficacy of Sulgro 70, a micronized ES fertiliz...

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Bibliographic Details
Published in:Canadian Journal of Soil Science 2021-06, Vol.101 (2), p.216-221
Main Authors: Bremer, E., Pauly, D., Strydhorst, S.M., McKenzie, R.H.
Format: Article
Language:English
Subjects:
Ammonium
Ammonium sulfate
Ammonium sulphate
Analysis
Canola
engrais soufré
Evaluation
Fertilizers
Ion exchange
Membranes
Oxidation
Seeding
Semifabricated products
Soil conditions
Soils
sulfate
sulfate d’ammonium
Sulfates
Sulfur
sulfur fertilizer
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Summary:Elemental sulfur (ES) fertilizers have high S content but may not be effective in the year of application due to the time required to oxidize. Rapid oxidation may be possible if the ES has a large surface area in contact with the soil. We evaluated the efficacy of Sulgro 70, a micronized ES fertilizer that is sprayed onto the soil surface, in eight field trials in southern and central Alberta over a 2 yr period. Under dry conditions in southern Alberta, the relative efficacy of Sulgro 70 to increase S supply to ion-exchange membranes was 22% during the first 4 wk period after seeding and 53% during the second 4 wk period after seeding, compared with ammonium sulfate (AS) sprayed on the soil surface. Under wetter conditions in central Alberta, the relative efficacy of Sulgro 70 to increase S supply was variable (51%–201%) during the first 4 wk period after seeding and 56% during the second 4 wk period after seeding. Based on increases in biomass S concentration in three trials where the unfertilized control had low S concentration (
ISSN:0008-4271
1918-1841
1918-1833
DOI:10.1139/cjss-2020-0134