DAPR - Clarendon Phosphate Rock (Per Tonne )
$260.00
Straightforward soil nutrition
BioCharge DAPR Phosphate is a cost-effective phosphate and calcium fertiliser for pasture and cropping systems. With approximately 6% phosphorus, 13% calcium, and around 1% potassium, it provides practical nutrient value with simple tonne pricing and no hidden charges.
Price basis Price shown is per tonne, plus GST
Supply basis Ex mine
Minimum order Confirm current minimum bulk load with Bio Charge
Freight Priced on application
Product function
How DAPR works in the soil
- Phosphorus supports root development, energy transfer, and plant growth processes.
- Calcium supports soil and plant nutrition where additional calcium is required.
- Potassium is present at approximately 1%, adding further nutrient value.
- Sustained release allows soil acidity to gradually dissolve phosphate into plant-available form.
Clarendon phosphate is classified as a medium-reactivity direct application phosphate rock. It is intended as a practical component of a planned, soil-test-led nutrient programme.
Practical value
Key benefits
- Cost-effective phosphate source with clear tonne pricing
- Approximately 6% phosphorus and 13% calcium
- Approximately 1% potassium adds extra nutrient value
- Suitable for long-term pasture nutrient maintenance
- Sustained-release character supports gradual availability
- Can be blended with other nutrients required by the farm
Where it fits
Ideal applications
- Pasture systems requiring phosphate and calcium
- Soils with a pH of 5.8 or below
- Long-term soil fertility and maintenance programmes
- Broadacre and commercial farming systems
- Programmes using periodic heavier applications
- Blends combining DAPR with soluble phosphate or other nutrients
Suitability and rate should always be confirmed using current soil-test information and qualified agronomic advice.
Plan from the soil up
Application guidelines
~6% Phosphorus
~13% Calcium
~1% Potassium
- Use recent soil-test information to confirm nutrient requirements and soil pH.
- Apply at a rate appropriate for the pasture, crop, and wider fertiliser programme.
- Ensure the programme supplies sulphur separately where it is required.
- Follow good fertiliser-spreading practice and all applicable local regulations.
Important: DAPR is a natural product and analysis can vary. Current testing uses X-ray fluorescence (XRF) for elemental analysis. Interpret cadmium findings with the method and reporting limit: non-detect is not the same as zero. Confirm the current product specification and seek farm-specific advice before application.
Straightforward soil nutrition
Practical nutrients. Clear value.
BioCharge DAPR is a cost-effective phosphate and calcium fertiliser for pasture and cropping systems. It delivers practical nutrient value at a lower tonne price, with no hidden charges.
Why choose DAPR
Built for practical farm nutrient programmes
Root development
Phosphorus supports root development, energy transfer, and key plant growth processes.
Calcium support
Useful where calcium is required as part of the wider soil and plant nutrition programme.
Extra nutrient value
Approximately one unit of potassium adds another useful element to the analysis.
Clear tonne pricing
A straightforward cost structure makes programme comparison and budgeting easier.
The Clarendon story
Read the full article (PDF)
A New Zealand phosphate resource, 25 million years in the making.
Dr Bert Quin explains the geological origin, agronomic fit, and practical application of Clarendon direct application phosphate rock.
Dr Quin writes that long-term pasture yield is likely to reach at least 95% of that achieved with RPR or superphosphate when other required nutrients are supplied. He also expects phosphorus losses through run-off and leaching to be considerably lower than with soluble manufactured phosphate fertilisers.
Where DAPR fits
Pasture systems
Phosphate and calcium support within a balanced pasture programme.
Cropping systems
A practical mineral input where soil test results indicate a requirement.
Budget-led programmes
Clear tonne pricing for easier comparison and planning.
Long-term fertility
A useful component of planned soil nutrient maintenance.
A practical option across pasture and cropping systems
Application guidance
Application approaches described by Dr Quin
The right strategy still depends on your soil test, farm requirements, nutrient budget, and wider fertiliser programme. The article outlines three practical approaches to discuss with your adviser.
Periodic heavier applications
The article suggests a heavier application approximately every three years as one possible approach.
Establishment plus maintenance
Another option described is a heavier initial application followed by annual maintenance applications.
Blend with soluble phosphate
The article also identifies mixing DAPR with soluble phosphate as a possible strategy.
Always base fertiliser decisions on current soil testing and qualified agronomic advice. Product analysis and recommendations may vary by source and farm conditions.
What Else Can Come With Your Phosphate?
Phosphate rock contains more than phosphorus. Its geological source influences the minerals and naturally occurring trace elements that come with it—including cadmium.
Bio Charge DAPR comes from New Zealand’s Clarendon deposit. We believe understanding what we supply means asking better questions, using appropriate testing and being transparent about what the results show.
Our current testing uses X-ray fluorescence (XRF) to analyse elemental composition. Cadmium findings must be interpreted alongside the method and reporting limit; an omitted element or a result below that limit is not proof that cadmium is absent.
Our goal is to keep unwanted trace elements as low as practically achievable, working towards non-detect results where appropriate quantitative testing can reliably demonstrate them. Non-detect is our ambition, not a claim established by our current testing.
Knowing your source is the starting point. Measuring and reporting what is present is how we build trust.
Need a farm-specific recommendation?
Make DAPR part of a smarter nutrient plan.
Talk with BioCharge about your soil test, production goals, and the right place for DAPR in your programme.