Phosroc® (Reactive Phosphate Rock) (0-13-0 + Ca 35%)

Highly reactive phosphate rock or RPR, is a natural soft rock, with 13% phosphorus and 35% calcium. It will release a third of the phosphorus in the first year and the balance over about 3 years, given reasonable moisture and a pH of 6.5 or below. The calcium substitution in this soft rock provides half the liming effect of Agricultural lime.

Farmers Marketing Network uses only the worlds best reactive material, with proven phosphate and liming performance, is bio-friendly, non-acidifying, and minimizes phosphate loss from leaching or sorption.

The product has "Organic Farm Input Certification" under NZ certification agency Bio-Gro New Zealand. Certenz, a Jas-Ans accredited certification body, certifies the process.

Chemical

Total phosphorus (P) (All plant available on acid soils)

12.9%

P soluble in citric acid in 30mins (% total P)

31%

Calcium (Ca)

35%

Sulphur (S)

1.2%

Magnesium (Mg)

0.3%

Sodium (Na)

0.2%

Molybdenum (Mo)

5-10ppm

Moisture

1-2%

Inert Impurities

Iron (Fe)

0.2%

Aluminium (Al)

0.2%

Fluorine (F)

2.9%

Ecologically Sensitive Traces

Cadmium (Cd)

20-25ppm

Arsenic (As)

<5ppm

Mercury (Hg)

<0.2ppm

Lead (Pb)

<3ppm

(NB the Australian standard "Agricultural and Veterinary Chemical (Fertilisers) regulations 1995" defines the max concentration level of Cadmium as 350ppm of Phosphorus.)

Particle Size Distribution

>2mm

<2%

1-2mm

<5%

0.5-1.0mm

10-20%

0.25-0.5mm

25-30%

0.15-0.25mm

30-35%

<0.15mm

15-20%

(NB repeated trials have shown that the particle size of this specific rock does not impact phosphate release.)

Phosroc - S® (0-11.5-0+Ca32%+S10%)

Highly reactive RPR with added elemental sulphur.

Chemical

Total phosphorus (P) (All plant available on acid soils)

11.5%

P soluble in citric acid in 30mins (% total P)

31%

Calcium (Ca)

32%

Sulphur (S)

10%

All other specifications standard to Phosroc and specified above.

Super Phosroc (PAPR) (0-15-0 + S2.5%)

Reactive Phosphate Rock partially acidulated to provide a 50/50 quick and sustained release phosphate with2.5% sulphur sufficient to address deficiencies present in most Australian soils.