Nutrient Management

Landco Fertiliser focusses primarily on amending nutrient deficiencies in the soil using quality fertilisers. Sustainable soil health and production are key to Landco’s ethos. Landco offers a Nutrient Management Service to meet legislation requirements and commitments that are to be adhered to by 2020 and on. Please refer our 'services tree' below.

Nutrient Management is not something new, it is something we have all become accustomed to hearing about on the TV, on the radio, at farming events, and in papers and magazines. Key to the subject is improving the quality of water in our lakes, rivers, and streams.

Fertiliser loss from runoff, erosion, leaching, and volatilisation* (gassing-off) all contribute to the issue, as does domestic and commercial waste that enters our waterways. Certain Nutrient Management practices are in place and this is reflected in the requirements of e.g. Fonterra, Dairy NZ, Councils. Overseer, plus various forms need completing in the Dairy industry however this will likely extend out to most sectors of agriculture. In addition, Regional Councils are developing their own guidelines to control loss with two of the main targets being Nitrogen and Phosphate. Based on reporting to date, regulation will provide a significant impact on every farm, and it will become another major requirement to cope with.

Regulation costs can be controlled

Throughout our website we have empahsised that Landco Fertiliser has products that can help mitigate the issues resulting from phosphate and nitrate loss. It is a problem however it need not be a major problem, we welcome the opportunity to discuss how we can support you meet your reporting responsibilities and lessen the pain that is current and further anticipated from Regional Council regulations.


Volatilisation is gaseous losses of urea N (nitrogen) to the atmosphere and can occur when the urea reacts with the soil moisture and breaks down leaving free ammonia (NH3) present at the soil surface. The enzyme urease, which is produced by denitrifying bacteria, facilitates the reaction. The critical period where loss is most predominant from volatilisation is within 48 hours after application and natural conditions such as wind, higher temperatures, moist soils, and lack of rainfall all accentuate the loss factor, in addition higher pH soils, soils with depleated soil exchange capacity add to the opportunity of loss. One of the most significant contributors which can be controlled is over application of urea especially when more than 50% of the product can be lost to volatilisation if there is no rainfall and additionally where some or all of the above factors heighten the problem.

Denitrification and leaching are other areas where urea N is lost.

  • Denitrification occurs when nitrate N (NO3-) is present in a soil and not enough oxygen (O2) is present to supply the needs of the bacteria and microorganisms in the soil.
  • Leaching losses of N occur when soils have more incoming water (rain or irrigation) than the soil can hold, soil type can also influence leaching opportunity.


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