12.6% P (Cit. Sol. ≥ 38%), 1% S, 32% Ca
Supplied ex Hastings Warehouse or through direct shipment to any NZ port
Supplied in bulk
Use in: Year round
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RPR (Reactive Phosphate Rock) contains a slow release, non-water soluble form of phosphate.
Why Use Fine Particle Granulated RPR:
Key benefits of RPR in general:
- P is in a non-water soluble (slow release) form. Not easily leached.
- Has a neutralising effect on PH. Has approximately 50% of the liming effect of standard Ag Lime. More importantly it is not acidifying the soil like other forms of Phosphate.
- Better suited to low PH soils and areas with higher rainfall.
- Non-acidic so good for soil health and biology.
Key Benefits of Dickie Direct Fine Particle Granulated RPR:
- Contains a high P content compared to alternative RPRs.
- Citric Solubility ranges from 37%-42% as a result of the product being ground to an average particle size of 74 Micron before the granulation process.
- Release period of 2-3 years in typical conditions.
- In a granule form giving it very good blending and application characteristics.
- Very low heavy metals with Cadmium testing at 1-2 PPM.
- Blend with Elemental Sulphur 90S to cater for medium term Sulphur requirements.
- Blend with DAP and/or TSP to achieve a balance between fast and slow release phosphate.
Precautions when applying RPR:
- RPR should be used in conjunction with Triple Super or DAP when a more immediate release of phosphate is also required.
- When transitioning from more conventional phosphate forms RPR should be used in conjunction with Triple Super or DAP until sufficient phosphate has started to be released from the RPR, this can be 1-2 years depending on soil and climatic conditions.
Phosphate's role in crops and pastures:
Phosphorus is an essential compound of Adenosine Triphosphate (ADP), the energising component driving plant development. Phosphorus plays an important role in photosynthesis as it enables plants to store and metabolise sugars, (the energy created in photosynthesis).The physical attributes in plants that are aided by phosphorus are:
- Larger root growth.
- Earlier formation of plant shoots.
- Improved stalk and stem strength in crops.
- Improved fruit, vegetable and grain quality.
- Promoted seed formation in crops.
- Increased resistance to moisture and colder temperatures.
Calcium's role in crops and pastures:
- Participates in metabolic processes of other nutrients uptake.
- Promotes proper plant cell elongation.
- Strengthen cell wall structure – calcium is an essential part of plant cell wall. It forms calcium pectate compounds which give stability to cell walls and bind cells together.
- Participates in enzymatic and hormonal processes.
- Helps in protecting the plant against heat stress – calcium improves stomata function and participates in induction of heat shock proteins.
- Helps in protecting the plant against diseases – numerous fungi and bacteria secret enzymes which impair plant cell wall. Stronger Cell walls, induced by calcium, can avoid the invasion.
- Affects fruit quality.
- Has a role in the regulation of the stomata.