Nutriology [photo] 


Much have been said over the last three months in various popular agricultural magazines regarding the fertilizer norms of the fertilizer industry. The primary reference is to the new eighth edition (2016) of the Fertilizer Handbook of the Fertilizer Association of Southern Africa (FERTASA).

Droughts are not uncommon in Southern Africa and farmers have developed a number of strategies to mitigate their effects and increase the chance of harvesting an economic yield.

With the value of pure phosphorus in fertilizer form at above R30.00/kg and thus the value of one part per million (ppm) thereof in the field at more than R200/ha (excluding return on crop response), the South African farmer needs to be very aware of his choice of phosphorus source.