Almond Polysulphate Granular Trial on Sandy Loam

11%

Yield increase

Polysulphate increased ROI, yield and NUE

Sanger, California, USA

11%

Yield increase

Key Conclusions

Polysulphate in the fall or spring showed positive yield responses vs GSP. However, granular Polysulphate (spring) resulted in statistically higher nut yield and economic returns.  

In addition, compared to GSP, Polysulphate (both standard and granular) shows positive NUE and nut yield due to prolonged release of K, Ca, Mg.   

Objective

To evaluate the performance of Polysulphate Standard, spring or fall applied, compared to the grower standard practice on almond in California.

Trial Details

Trial station

Sanger, California, USA

Crop

Almond

Assessments

Yield, Tissue and Soil Analysis

Treatments

  • Grower Standard Practice, Spring Applied, 0 lb/acre 
  • Polysulphate Standard + MAP, Spring Applied, 1071 lb/acre + 38 lb/acre 
  • Polysulphate Standard + MAP, Fall Applied, 1071 lb/acre + 38 lb/acre 
  • Polysulphate Standard + SOP + MAP, Fall Applied, 750 lb/acre + 90 lb/acre + 38 lb/acre 
  • Polysulphate side discharge broadcast spreading along the treeline 

Treatments

  • Grower Standard Practice, Spring Applied, 0 lb/acre 
  • Polysulphate Standard + MAP, Spring Applied, 1071 lb/acre + 38 lb/acre 
  • Polysulphate Standard + MAP, Fall Applied, 1071 lb/acre + 38 lb/acre 
  • Polysulphate Standard + SOP + MAP, Fall Applied, 750 lb/acre + 90 lb/acre + 38 lb/acre 
  • Polysulphate side discharge broadcast spreading along the treeline 

Results