Feeding the world’s growing population

New Zealand’s reputation as a quality food producer is growing.

Optimising food production

Over the next 50 years farmers around the world will need to produce more food than has been grown over the past 10,000 years.

Best use from a limited resource

Fertiliser helps farmers produce food efficiently by replenishing the soil. But fertiliser needs to be used responsibly.

Responsible and sustainable nutrient management

The Fertiliser Association invests in research and tools to ensure farm profitability while minimising nutrient losses to the environment.

The Fertiliser Association of New Zealand promotes and encourages responsible and scientifically-based nutrient management.

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Soil types and phosphorus levels

Phosphorus 'availability' differs between the various soil types. This is due to the different minerals, organic matter and soil chemistry. The plant growth responses and the appropriate 'Olsen P' values for each of the different soils, have been calibrated using a very large number (thousands) of fertiliser response trials across New Zealand.

For information on fertiliser guidelines, see our series of booklets here. For detailed scientific information on the relationship between pasture production and soil phosphorus, see here.


The Fertiliser Association of New Zealand and Dairy NZ funded development of the Nutrient Management Adviser Certification Programme (NMACP). This industry-wide certification aims to ensure that advisers have the learning, experience and capability to give sound nutrient advice.

Find out more

15 April 2021

Good soil fertility is critical for our agricultural economy. We welcome today's report. One of the areas highlighted in the report is soil quality, and in particular, soil fertility as measured by the 'Olsen P' soil test. However, the report's analysis is based on a limited data set. Our analysis of industry data suggests a slightly different picture than presented in the report.

31 March 2021

Congratulation to Tim Jefferd, Regional Manager for the Eastern North Island at Agricom, who became the 300th person certified through our Nutrient Management Adviser Certification Programme.

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