June 2024

In the ever-evolving field of agriculture, slow-release fertilisers have become a game-changer for farmers seeking sustainable and efficient nutrient management. Profile Fertilisers, based in New Zealand, offers an innovative range of slow-release fertilisers that differ significantly from conventional options. Understanding what sets these fertilisers apart can help farmers make informed decisions for their crops. Traditional fertilisers often release nutrients rapidly upon application, leading to a quick but short-lived nutrient surge in the soil. This can result in nutrient leaching, where excess nutrients wash away into water systems, causing environmental issues and reducing the efficiency of fertiliser use. In contrast, slow-release fertilisers are designed to release nutrients gradually, matching the natural uptake patterns of plants. Key Components of Slow-Release Fertilisers: 1. Coating Materials: One of the primary features of slow-release fertilisers is the use of coating materials that control the rate at which nutrients are released. These coatings can be made from natural or synthetic materials such as sulphur, polymer, or resin. The coating acts as a barrier, allowing water to penetrate slowly and dissolve the nutrients at a controlled pace. 2. Encapsulation Technology: Advanced encapsulation technology is employed to encase the fertiliser granules. This technology ensures that nutrients are released over an extended period, typically ranging from several weeks to months. The rate of release can be precisely tailored based on the crop’s nutrient needs and environmental conditions. 3. Controlled Solubility: The solubility of the fertiliser components is another critical factor. Slow-release fertilisers are formulated with nutrient compounds that dissolve slowly in water. This controlled solubility prevents the rapid depletion of nutrients and ensures a consistent supply to the plants. 4. Microbial Decomposition: Some slow-release fertilisers incorporate organic materials that require microbial decomposition to release nutrients. This natural process not only provides a steady nutrient flow but also enhances soil health by promoting beneficial microbial activity. Profile Fertilisers’ commitment to innovation and sustainability is evident in their range of slow-release fertilisers. These products are designed not only to meet the nutritional needs of crops but also to align with the principles of sustainable agriculture. By understanding the science behind slow-release fertilisers, farmers can better appreciate their benefits and make choices that support both their productivity and the environment. In conclusion, slow-release fertilisers from Profile Fertilisers offer a sophisticated solution to the challenges of modern agriculture. With advanced coating technologies, controlled solubility, and microbial decomposition, these fertilisers provide a steady and efficient nutrient supply, fostering sustainable farming practices in New Zealand and beyond. Contact Profile Fertilisers Don Henderson: 021 643 698 Factory: 027 222 7698donh@profilefert.co.nz www.profilefert.co.nz Contact Phillip Quay phillip@mediapa.co.nz 027 458 7724 www.mediapa.co.nz

The Wairepo Catchment Group and the Omarama Stream Water Users Group of Mackenzie Country recently hosted a presentation titled “Advancing Sustainable Agriculture in New Zealand.” The event featured Dr Gordon Rajendram, a soil scientist and independent consultant, and Allan Piercy, managing director of Agraforum New Zealand. Held on 29 April 2024 in Twizel. The talk emphasised the urgent need to reduce nitrate N leaching by half to maintain farming consents, given the region’s low rainfall, cold winters, and predominant dairying, cattle and sheep farming. In order to farm sustainability in this area, there needs to be a whole catchment approach. Dr Rajendram explained that the area’s soils, with an Anion Storage Capacity (ASC) averaging around 15% and low Cation Exchange Capacity (CEC), are not conducive to retaining nutrients. This results in significant leaching losses, especially with higher stocking rates and cattle grazing on pastoral land. Nutrient loading rates in urine patches can be as high as 600-900 kg of nitrogen and potassium, which penetrate below the pasture root zone and leach into waterways. Twizel experiences low annual rainfall, averaging around 700 mm, and cold temperatures, with winter lows often dropping below freezing. “These conditions hinder nutrient retention and increase the likelihood of leaching. The region relies on irrigation, which is vital for pasture production.” Dr Rajendram emphasised the importance of water availability for effective farming and practical solutions such as using biochar/humates (pure carbon source) to bind nitrogen and other nutrients, use of stand off pads/herd homes to reduce urination events on paddocks or reducing cattle/cow numbers to mitigate environmental impacts. If for instance the cattle were on stand off pads or a herd home for half a day, the nitrate leaching into water ways will reduce by half of what it is at present. Dr. Rajendram explained that if pure carbon such as Biochar was used and was incorporated into the soil to achieve an approximate 10% biochar/90% soil ratio, it would reduce nitrate leaching down to zero. Any farmer can make biochar from Wilding pines which is a pest in the Mackenzie basin.  Rajendram explains that Trevor Richards of Biochar NZ gave a practical demonstration on a Twizel farm on making biochar in pits using Wilding pines.    Allan Piercy’s Contributions from Agraforum New Zealand Following Dr Rajendram’s presentation, Allan Piercy discussed Agraforum New Zealand’s role in providing solutions to nitrate N leaching. Piercy introduced several key products designed to enhance pasture production while reducing fertiliser dependency. A highlight of his talk was El-I-Tech’s Biodynamic N, a product that facilitates biological nitrogen fixation, significantly reducing the need for synthetic fertilisers. Piercy emphasised that integrating these products into nutrient management plans can significantly reduce nutrient leaching and improve soil health. Other notable products mentioned included: “Our products offer a practical solution to nutrient management challenges, helping farmers reduce leaching and improve soil health for long-term sustainability.” – Allan Piercy, Managing Director of Agraforum New Zealand Piercy emphasised that integrating these products into a nutrient management plan can significantly reduce nutrient leaching and improve soil health. Agraforum New Zealand’s focus on sustainable farming practices ensures that their solutions not only address immediate nutrient retention issues but also contribute to long-term soil health and productivity. These insights and solutions provide a comprehensive approach to tackling the nitrate N leaching challenge in Twizel, ensuring sustainable and productive farming practices. For more information on Agraforum New Zealand’s products, visit Agraforum New Zealand Products. Contact Dr Gordon Rajendram 021 466077 rajendram@xtra.co.nz www.gordonrajendramsoilscientist.co.nz Contact Agraforum New Zealand Mobile: 0274 485 159Email: allan@agraforum.co.nz www.agraforum.co.nz Contact Phillip Quay phillip@mediapa.co.nz 027 458 7724 www.mediapa.co.nz