Nutri-Phos Soft Rock™

Full-season phosphate supply without the lockups. Soft rock is a cadmium-free, bio friendly, colloidal clay-based rock phosphate

A colloidal calcium phosphate that can never lock up, in stark contrast to all other phosphate sources. This exceptional fertiliser includes 10% phosphorus, 24% calcium, 26% silica and a rich lode of trace elements. A microbe-friendly bio-phosphate, which is an integral part of our soil regeneration program. This is one of the few phosphate sources that doesn't have problems with the heavy metal cadmium and it becomes plant-available in a fraction of the time involved with reactive rock phosphate.

Packaging.

  • 25kg bags, 1 tonne pallets of 25kg bags, 1-tonne bags, bulk (loose) in truckloads or per kg in prescription blend.

Information:

  • All elements are in colloidal form. This provides ongoing plant-availability and ensures that none of the component elements can ever become locked up.
  • Lowest cadmium levels of any phosphate product in the world with less than 1 ppm. All phosphate sources include the heavy metal cadmium in varying levels. This is proving a major environmental problem, with consumers becoming more aware of the problem and demanding cadmium-free produce.
  • Exceptional trace element levels.
  • Helps re mineralise soils.
  • Colloidal minerals provide health benefits to soil microbes.
  • Colloidal calcium component (24%) is much more plant available than limestone.
  • High in silica. Research suggests increased brix levels in plants are related to the presence of silica.
  • BFA certified organic.
TYPICAL ANALYSIS
TYPICAL ANALYSIS
Silica
26%
Copper
120ppm
Calcium
24%
Zinc
325ppm
Phosphorus
10%
Cadmium
1ppm
Iron
2.0%
Magnesium
6600ppm
Potassium
6000ppm
PROPERTIES
Sulfate
4500ppm
pH
8.4 (1:5 water extract)
Carbon
1590ppm
Solubility
Not soluble
Manganese
1500ppm
Particle Size
< 0.5 mm
Chloride
360ppm
Appearance
White powder

Application Rates:

  • Soil:
    100 kg to 1.5 tonnes per hectare. Home gardens: Use 1.25 kg per 10 m².

Note:

  • Nutri-Phos soft rock does not contain soluble phosphate, therefore the phosphate availability is a function of acid soil conditions and/or active soil biology, ie. soft rock phosphate becomes available rapidly in acidic soils. In alkaline soils, it should be combined with compost, humates, compost tea or a microbial inoculum like Nutri-Life 4/20 to ensure maximum performance.

© Steve Cselka 2002 - 2011