0800 843 809 info@esi.org.nz

Functional Fertiliser Ltd

Free phone:
0800 843 809

Peter Burton:
027 495 0041

Coralie Burton:
027 748 6317



the Nitrogen fixer

A unique Soil Improver containing Calcium (lime), Soft Carbon and Microbes for Plant Growth & Soil Health

Environmentally friendly nitrogen.

Permanent pastures of clover and rye grass will remain the foundation of New Zealand’s intensive pastoral farming with clover providing the bulk of the nitrogen required for high production.

Over the last twenty years increasing quantities of nitrogen fertiliser has been applied to New Zealand pastures and many farms have developed a dependence on regular applications to maintain growth.

A reliance on fertiliser nitrogen for high pasture yield is no longer acceptable.

The cost of nitrogen fertiliser will steadily rise and its use increasingly regulated. The maintenance of our clean fresh water is now essential for the production of premium quality food for international markets.

CalciZest applied in spring stimulates clover growth over summer when soil temperatures encourage the seeding of grasses. Clovers thrive with increased direct sunlight and higher temperatures.

In the 2006 spring, 6 properties applying CalciZest and/or DoloZest had the following percentage of clover in the sward compared to 6 traditionally fertilised properties.

 Clover % in pastureClover % in pasture
properties (6) with
DoloZest &/or CalciZest
properties (6) without
DoloZest &/or CalciZest

Well managed pastures using CalciZest as part of a sound nutrient programme are able to grow more than 20 tonne of DM annually without reliance on fertiliser nitrogen.

Early in November rye grass, usually the dominant grass in pastures, changes from strong vegetative growth to developing a seed head.

From the table above it can be seen that the clover content in well managed pastures steadily increases throughout spring and early summer, providing a range of benefits.

Clover contains significantly higher levels of calcium than grass.

Whether the focus is milk production, or the growth of animal frame and meat production, calcium provides the base.

Clover is also more digestible than grasses, which means that animals can eat more, grow more rapidly, and produce more milk solids.

Monitoring work on properties where CalciZest is applied shows that clovers nearly always contain more and never less soluble sugars i.e. the energy content is higher than grasses.

The physical structure of clover allows for efficient utilisation of sunlight with a strong clover sward able to protect the soil during hot weather reducing loss of moisture.

Well structured pastoral soils in New Zealand normally contain between 5,000 and 14,000kg/ha of organically held nitrogen in the top 25cm. Nitrogen uptake by pasture plants is usually around 450kg/ha annually.

Visual Soil Assessment work by Graham Shepherd indicated that properties using CalciZest based programmes have low potential for greenhouse gas emissions and are sequestering carbon.

The nitrogen fixed by clover is provided as required for growth, with surplus held in the organic matter of the soil and available for plant uptake at a later time. It’s a highly efficient and effective natural system.

CalciZest, as the basis of total nutrient programmes, supplies the extra plant available calcium required for long stemmed, large leafed clover while providing the environment for increased numbers of beneficial earthworms.

Since the start of measuring and monitoring work in 2003 it is noticeable that there is little, if any, flea or weevil damage to CalciZest-fed clovers.

Healthy plants with sufficient of all nutrients necessary for optimum growth are largely unaffected by pest or disease.

Bloat is not necessarily a consequence of clover. When clover growth is calcium rather than potassium driven, at the ideal time for grazing, the stem of the clover will be solid and the likelihood of bloat is minimised.

Clovers in pastures growing under near ideal conditions can fix in excess of 240 kg of nitrogen per ha per year. The balance of the N required comes from soil microbes able to fix N directly from the atmosphere, urine, and the brea