Polysulphate Corn Trial on Okolona Silty Clay
Yield increase
Brooksville, Mississippi, USA 2021
Yield increase
Key Conclusions
In corn production on high organic matter soil with high soil test sulfur, Polysulphate is a viable source of sulfur. Polysulphate increased corn yields by 7% compared to potassium chloride (KCL) applied with elemental sulfur (S) as the sulfur source.
Objective
Evaluate the performance of Polysulphate fertilizer rates in corn when applied spring pre-plant, compared to equivalent units of sulfur (S) applied in the standard grower program as elemental S.
Trial Details
Trial station
Brooksville, Mississippi, USA
Crop
Corn
Product
Polysulphate®
Assessments
Yield (bu/a).
Treatments
- This randomized complete block trial consisted of three replicates with 9 treatments.
- All application was done pre-plant incorporated.
- Potassium Chloride (KCL) was applied with the elemental sulfur (S) to match K level in Polysulphate.
- Polysulphate and elemental sulfur was tested to supply up to 40 lbs/A actual sulfur.
- Treatments shown here include: Control (without S application ), Polysulphate 10 lbs S/A and Elemental S 10 lbs S/A + 6 lb K/A
Treatments
- This randomized complete block trial consisted of three replicates with 9 treatments.
- All application was done pre-plant incorporated.
- Potassium Chloride (KCL) was applied with the elemental sulfur (S) to match K level in Polysulphate.
- Polysulphate and elemental sulfur was tested to supply up to 40 lbs/A actual sulfur.
- Treatments shown here include: Control (without S application ), Polysulphate 10 lbs S/A and Elemental S 10 lbs S/A + 6 lb K/A
Results
- Corn yield increased with application of sulfur fertilizer.
- Polysulphate at 10 lbs S/A increased corn yield by 27% compared to the control without sulfur. • Polysulphate at 10 lbs S/A increased corn yield by 7% compared to S plus KCL applied at the same rate.