The availability of P in the soil – for optimum productivity and converting moisture into plant matter.
Successful users of BioAgPhos (BAP) in their cropping and grazing systems recognise the value of having slower releasing and longer available P as is the case with BioAgPhos, in addition to the water-soluble P products, SSP and ammonium phosphates. They value the P supply and demand curves being better met than with an entirely soluble fertiliser approach.
Let me explain how best practice in the use of BioAgPhos eliminates any spreading cost argument.
In grazing systems, we tend to prescribe BioAgPhos, the sulphur fortified version S10 BioAgPhos, or the BAP and gypsum blend Superb, at a 2-year rate.
All these materials are compatible with lime and/or other materials that are generally supplied in powdered or non-granular form. Therefore, a typical pasture blend for application on a 2-year basis might look like 500 kg/ha lime blended with 300 kg/ha of Superb or 250 kg/ha of S10 BioAgPhos.
In cropping systems where the soils are being disturbed, and spread product is more readily incorporated, greater amounts of product can be applied on a less frequent basis. A typical broadacre-spreading blend at the start of the rotation and every 3 to 4 years after might be: 1 t/ha of lime, blended with 200-250 kg/ha of BioAgPhos.
Generally, sulphur will come from gypsum or SOA that might be prescribed as well depending on soil levels and crop needs.
With an application frequency of 2-4 years, the additional spreading costs over spreading granular fertilisers annually are fully mitigated. At the same time, and given the compatibility of the BioAg solids range with lime and other soil amendments, these materials can be inexpensively blended together on farm for single application.
In short we’ve had farmer customers working with BioAg since we started producing BioAgPhos in 2000 and they happily implement the BioAg programs, knowing that the improvements in soil health, fertility and productivity far outweigh product and application costs.