When it comes to fertiliser, there is more to it than meets the eye

TerraCare granulates all of its products for improved chemical reaction and a better spreadable quality end product.

In the production process a chemical reaction changes the Mono Calcium Phosphate Ca(H2PO4)2 into Di Calcium Phosphate CaHPO4: a product with completely different characteristics. MCP is highly water soluble and has a low pH when dissolved. DCP has a low water solubility and a higher pH of up to 6.5.

After production, DCP is post cured to finalise the chemical reaction.

The TerraCare signature products rePlenish and uPgrade are registered with Fertmark: an independent organisation which checks the quality and content of fertilisers.

Proprietry products are Fertmark Registered and Controlled. The TerraCare signature products rePlenish and uPgrade are registered with Fertmark: an independent organisation which checks the quality and content of fertilisers. Our quality control process makes us check every production batch.

TerraCare Slow Release phosphate products have been scientifically designed and tested. All products are rich in nutrients and have a higher pH to support Healthy grass growth and soil life.

Nutrients N P K S Ca
rePlenish 9.0 8.3 24.0
rePlenish MS 8.6 12.0 23.0
rePlenish S 8.4 14.4 22.3

RePlenish Product MSDS:

rePlenish MS
rePlenish s
Nutrients N P K S Ca
uPgrade 6.5 5.6 28.8
uPgrade S 6.0 11.9 26.8

uPgrade Product MSDS:

uPgrade S
Nutrients N P K S Ca Mg
Progresso 14.0 1.0 16.0
Nutrients N P K S Ca Mg
DiMag67 6.0 5.3 22.0 7.0
Nutrients N P K S Ca
exteNd 46.0

Frequently asked questions

What’s the optimum pH for soil microbial activity?

pH 5.8 – 6.5

Improved microbial activity can lead to better soil structure which, in turn, results in improved soil aeration and water-storage. These lead to increased plant growth, especially in summer and autumn.

What’s the importance of keeping soils pH neutral for pasture growth and development?

Maintaining soil pH at 5.8 – 6.2 is an essential part of pasture management. Most soils in New Zealand are naturally acidic and will produce low yields without lime or lime-based fertilisers. If the soil pH is too high or too low, certain nutrients needed for plant growth are less available for uptake. This leads to plant nutrient deficiencies and poor yields.

Soil with ideal pH also encourages earthworm activity, which means:

  • Better soil aeration.
  • Improved root growth.

Soil has greater resistance to compaction and bounces back to optimum production quicker after adverse field conditions.

How can I increase or maintain my soil pH?

  • You can apply lime on its own or you can use Dicalcic (and get P as well).
  • Continuously applying Dicalcic as part of your fertiliser plan can gradually increase soil pH (especially on hill country where you generally need more fertiliser per stock unit).

Is lime really needed for animal production and growth?

Yes, it’s essential if you want to maximise production from your land.

  • Lime has a great effect on soil conditioning it to the ideal pH for plant growth and production – without its conditioning properties you can be wasting a lot of your fertiliser inputs.
  • It’s suggested about 15kg of lime per stock unit is required per annum to maintain soil pH. On average it takes 1 tonne to raise soil pH 0.1 of a unit, which is 1 tonne per hectare.

TerraCare Dicalcic Phosphates are rich in calcium – which contributes to a higher soil pH

Why is soil microbial activity important?

  • The higher the levels of soil microbes, the greater the rate of breakdown of fresh organic matter, which means nutrients are recycled to sustain plant growth much faster.
  • Microbes improve soil structure by helping to bind soil particles together which improves aeration and the soil’s capacity to store water.
  • Clover needs specific microbes – Rhizobia – to help fix nitrogen. The Rhizobia species needed by clovers thrive best at soil pH levels between 6.0 and 6.5, so keeping soil pH in the ideal range will increase the amount of nitrogen fixed – reducing the need for urea. Clover can supply up to 220kg N/ha/yr).

Why is soil earthworm activity important?

Earthworm activity improves the soil structure by providing:

  • Better aeration.
  • Better environment for root growth (easier root penetration).
  • Greater resistance to compaction and quicker return to production after adverse field conditions (pugging, flooding, drought etc.)
  • Influence on increasing organic matter decomposition and the ensuing nutrient availability

Earthworm counts respond well to increases in both calcium and soil pH levels.

How do phosphate or urea fertilisers affect the microbial activity in soil?

  • Microbial activity in the soil declines when the pH level decreases below 6.0 pH.
  • Through the process of growing plants, soil will naturally become more acid. The use of phosphate and nitrogen products such as urea and DAP stimulate plant growth which will cause the soil pH to decrease (in the absence of regular lime applications). This has the effect of reducing soil microbial activity.
  • Dicalcic differs from superphosphate as it has more calcium per unit of P applied; this means that it will absorb acid from the soil to become available, helping to counter the acidifying effect of plant growth. Some dicalcic fertiliser products also contain calcium carbonate which also reduces soil acidity.