In high phosphate retention soil (particularly at low pH) the P in the monocalcium phosphate in superphosphate can be fixed by aluminium and iron in the soil – making it less able to aid plant growth. 

  • Because dicalcic P fertilisers can decrease soil acidity, nutrients already in the soil may be used more effectively than when superphosphate is used to provide P.
  • This means you’re getting much more value than you ever thought out of your nutrient investment… it’s a far more efficient way to enhance your soil and pasture.
  • Because of the high calcium to phosphorous ratio in Dicalcic, it’s also much less susceptible to P fixation.