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Copy link Polysulphate Cotton Trial in Turkey
12.5
Antalya, Turkey 2016
12.5
Key Conclusions
Trial shows seed cotton yield was significantly increased by all 3 K sources. The yield of the Polysulphate treatments was 77% greater than the control without K application. Yields of Polysulphate and SOP treatments were significantly the same.
Objective
To investigate the effect of Polysulphate, potassium sulphate (SOP) and potassium chloride (MOP, KCl) on the yield and quality parameters of cotton.
Trial Details
Trial station
Antalya, Turkey
Crop
Cotton
Product
Standard Polysulphate
Assessments
Yield and Fiber elongation.
Treatments
This randomized trial consisted of four replicates with four treatments. Nitrogen, phosphorus and potassium were applied according to target yield and soil tests at a rate of:
- 250 kg N ha-1 (as ammonium nitrate and di ammonium phosphate, DAP)
- 184 kg P2O5 ha-1 (as di ammonium phosphate, DAP)
- 210 kg K2O ha-1 (as Polysulphate, SOP or MOP)
Control treatment received the same N and P doses but no K was applied.
Treatments
This randomized trial consisted of four replicates with four treatments. Nitrogen, phosphorus and potassium were applied according to target yield and soil tests at a rate of:
- 250 kg N ha-1 (as ammonium nitrate and di ammonium phosphate, DAP)
- 184 kg P2O5 ha-1 (as di ammonium phosphate, DAP)
- 210 kg K2O ha-1 (as Polysulphate, SOP or MOP)
Control treatment received the same N and P doses but no K was applied.
Results
- Polysulphate application increased the net return and was very profitable, with a B:C (benefit:cost ratio) of 9.2.
- The highest fiber elongation was found in the Polysulphate treated cottons. This is one of the most important physical parameters for cotton quality.
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