Fishers Creek Rock Dust is ground from naturally occuring rock. This basaltic rock, derived from volcanic activity, has a wide composition of minerals. Rather than focus on a specific set of nutrients, FCRD provides soil benefits due to its balanced nutrient base.

Silica is the most abundant element on Earth, for this reason it is forgotten in soil conditioning and fertilising regimes. Silica is taken from the soil by plants to assist in the building of cell walls. Without available silica the cells underdevelop and become susceptible to disease, fungus and aren't as structurally strong.

Traditional fertilisers focus on chemical balances between NPK (Nitrogen, Potassium and Phosphorous). However, soil is composed of more elements than this. Thus replacing only the NPK's leaves the soil under mineralised.

Furthermore, phosphorous fixation is a major problem. Phosphorus fixation is the process whereby added Phosphorus is not taken up by the plant because it becoms fixed in the soil. Adding a wide range of minerals helps to unlock the excess phosphorous and nitrogen and therefore making the use of traditional NPK fertilisers much more effective and efficient.

FCRD suggests to users of NPK fertilisers that they can reduce their costs by using significantly less traditional fertilisers, by adding a portion of FCRD (to realease the full potential of the traditional fertilisers) and still maintain or increase yield . The upside comes from an increase in soil quality due to the addition of organic nutrients.

FCRD contains:

• Volcanic rock - 90% finer than 0.250 mm
• Silicates - Necessary in building plant protein in the cell wall. Their strengthening qualities are vital in protecting against insect and fungal attack.
• Calcium - Required for cell division and as a component of cell walls.
• Magnesium - A key part of the chlorophylls, which perform photosynthesis.
• Iron - Aids in the promotion and regulation of plant growth.
• Potassium - Strengthens plant stalks
• Phosphorous - Energy food for plants
• Trace Minerals - Plant growth can suffer without these. FCRD contains over 70 macro and micronutrients not found in commercial NPK fertilisers.

The average composition of FCRD expressed as oxides is:

SiO2 43%
Fe2O3 13%
Al2O3 13%
MgO 11%
CaO 9%
Na2O 2%
TiO2 2%
K2O 2%

As elements, the average composition is:

Silicon 22%
Iron 11%
Aluminium 8%
Calcium 7%
Magnesium 6%
Sodium 2%
Titanium 2%
Potassium 1%

See Plant Resistance for more details
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