Phillip

Dr. Gordon Rajendram, a renowned authority in soil science and agricultural sustainability, sheds light on the invaluable benefits of clover as a superior feed option for livestock. With its nutrient-rich composition and impressive protein content, clover stands out as a key ingredient in optimising animal diets for enhanced productivity. Comparing clover to ryegrass, a common forage choice, reveals the significant nutritional advantage that clover offers. While ryegrass typically contains around 3.0% nitrogen, resulting in approximately 19% protein content, clover boasts a nitrogen content of approximately 5.5%, translating to an impressive 34% protein content. This stark contrast underscores the potency of clover as a high-quality protein source, capable of providing essential nutrients to support the growth and development of livestock. “Clover stands as nature’s gift to livestock farming, offering a nutritional powerhouse that elevates milk and meat production to new heights. As we strive for agricultural sustainability, harnessing the potential of clover as a superior feed option is not just advantageous; it’s essential for maximising productivity and ensuring the well-being of our animals.” – Dr. Gordon Rajendram The higher protein content in clover which is 34% holds immense significance for dairy and meat producers alike. Protein plays a crucial role in animal nutrition, serving as a building block for muscle development, milk production, and overall health. By incorporating clover into the diet, farmers can ensure that their livestock receive adequate protein levels, thereby promoting optimal growth and maximising productivity. Moreover, clover offers additional nutritional advantages beyond its protein content. Compared to ryegrass, clover exhibits higher mineral content and enhanced digestibility, further augmenting its suitability as a premium feed option. These qualities not only contribute to the overall health and well-being of livestock but also facilitate efficient nutrient absorption, leading to improved feed conversion rates and reduced wastage. In practical terms, integrating clover into livestock diets can yield tangible benefits for farmers. Increased protein intake translates to higher milk yields in dairy cows and improved weight gain in meat-producing animals, ultimately enhancing farm profitability and sustainability. Additionally, the superior nutritional profile of clover can reduce the reliance on supplemental feed additives, thereby lowering production costs and minimising environmental impact. As farmers strive to optimise their operations and meet the growing demand for high-quality dairy and meat products, the role of feed quality cannot be overstated. Dr. Gordon Rajendram’s insights underscore the pivotal role that clover plays as a superior feed option, offering a potent combination of protein, minerals, and digestibility. By harnessing the power of clover, farmers can unlock the full potential of their livestock, paving the way for a more prosperous and sustainable agricultural future. Contact Dr. Gordon Rajendram Soil Scientist Soil Fertility, Agronomy & Farm Environmental Consultant Address: 9 Kakanui Avenue, Hillcrest, Hamilton 3216 Phone: 021 466 077 E-mail: rajendram@xtra.co.nz Web site:  http://dev.gordonrajendramsoilscientist.co.nz ‘Bringing science to the farm ‘ Contact Phillip Quay Phone: 0274 587 724 Email: phillip@mediapa.co.nz Website: https://mediapa.co.nz/ Facebook: facebook.com/mediapa

With his expertise in soil health and fertilisation practices, Dr. Rajendram emphasises the critical role of ASC in optimising agricultural productivity and environmental sustainability. ASC, or P-retention, refers to the soil’s ability to remove phosphorus (P) from the soil solution, thereby holding it firmly and making it less available to plants. This characteristic is largely influenced by soil mineral composition, particularly the presence of iron (Fe) and aluminium (Al), which act as binding agents for P. Soils with low ASC exhibit minimal P binding sites, potentially leading to nutrient leaching and reduced plant uptake. “Anion Storage Capacity (ASC) is the silent guardian of soil fertility, holding the key to sustainable agriculture. In a world where economic uncertainties loom large, understanding and enhancing ASC becomes imperative for farmers. By unlocking the potential of ASC through targeted soil management, we not only cultivate resilience in our farms but also nurture a healthier planet for generations to come.” – Dr. Gordon Rajendram In New Zealand, where farming practices are integral to the economy and food production, maintaining optimal soil fertility is paramount. However, amidst economic challenges such as recession and inflation, ensuring soil health becomes even more imperative for farmers striving to maintain profitability and sustainability. Understanding ASC is crucial for effective fertilisation strategies and soil management practices. By assessing ASC levels through soil testing, farmers can tailor their fertiliser applications to match the specific needs of their soils, thereby maximising nutrient utilisation and minimising environmental impact. Dr. Rajendram’s research underscores the importance of ASC in soil fertility management and its implications for farm profitability and environmental stewardship. By enhancing ASC through targeted soil amendments and conservation practices, farmers can improve nutrient retention, reduce nutrient runoff, and safeguard water quality. Moreover, prioritising soil health and ASC optimisation aligns with efforts to reduce the environmental footprint of agriculture. By minimising nutrient losses and enhancing nutrient cycling within the soil-plant system, farmers can contribute to the preservation of natural resources and ecosystems. In conclusion, Anion Storage Capacity (ASC) plays a pivotal role in soil fertility management and agricultural sustainability. Through the expertise of leading soil scientists like Dr. Gordon Rajendram and the adoption of innovative soil management practices, New Zealand farmers can navigate economic challenges while safeguarding soil health and enhancing farm resilience for future generations. Contact Dr. Gordon Rajendram Soil Scientist Soil Fertility, Agronomy & Farm Environmental Consultant Address: 9 Kakanui Avenue, Hillcrest, Hamilton 3216 Phone: 021 466 077 E-mail: rajendram@xtra.co.nz Web site:  http://dev.gordonrajendramsoilscientist.co.nz ‘Bringing science to the farm ‘ Contact Phillip Quay Phone: 0274 587 724 Email: phillip@mediapa.co.nz Website: https://mediapa.co.nz/ Facebook: facebook.com/mediapa

In New Zealand, where farming practices are integral to the economy and food production, soil fertility plays a pivotal role in determining the success of agricultural endeavours. However, amidst economic challenges such as recession and inflation, ensuring optimal soil health becomes even more imperative for farmers striving to maintain productivity and profitability. Phosphate, a key component of soil fertility, serves as a vital nutrient for plant growth and development. Its presence in the soil is essential for facilitating various biochemical processes necessary for crop production and pasture growth. Through soil testing and fertiliser recommendations, experts like Dr Rajendram help farmers assess and address deficiencies in phosphate levels, ensuring that their land remains fertile and productive. “Phosphate, the silent hero beneath our feet, holds the key to unlocking the potential of our soil. In a world of economic uncertainties, its role in maintaining soil fertility becomes paramount. By nurturing this vital nutrient, we not only cultivate bountiful harvests but also sow the seeds of sustainability for generations to come.” – Dr. Gordon Rajendram By maintaining adequate phosphate levels in the soil, farmers can optimise nutrient uptake by crops and pastures, leading to improved yields and enhanced animal nutrition. Pasture testing and feed analysis further aid in fine-tuning nutrient management strategies, ensuring that livestock receive balanced diets essential for growth and performance. Moreover, prioritising soil health and nutrient management not only benefits farm profitability but also contributes to environmental sustainability. By minimising the use of excess fertilisers and adopting precision farming practices, farmers can reduce their environmental footprint and mitigate the risk of nutrient runoff into waterways. Dr. Gordon Rajendram’s expertise in soil science and agricultural practices underscores the importance of proactive soil management in optimising farm productivity and sustainability. Through ongoing research and education initiatives, he continues to empower farmers with the knowledge and tools needed to safeguard soil health and enhance agricultural resilience in the face of evolving challenges. In conclusion, phosphate stands as a cornerstone of soil fertility, supporting vibrant farming ecosystems and ensuring food security for future generations. By heeding the insights of leading soil scientists like Dr Rajendram and prioritising soil health in farming practices, New Zealand farmers can navigate economic fluctuations while fostering a more sustainable and prosperous agricultural landscape. Contact Dr. Gordon Rajendram Soil Scientist Soil Fertility, Agronomy & Farm Environmental Consultant 021 466077 rajendram@xtra.co.nz www.gordonrajendramsoilscientist.co.nz ‘Bringing science to the farm ‘ Contact Media PA 027 458 7724 phillip@mediapa.co.nz www.mediapa.co.nz

Soil structure plays a pivotal role in determining the agricultural productivity and sustainability of New Zealand’s diverse landscapes. Dr. Gordon Rajendram, a leading soil scientist, examines how the structural integrity of soil affects everything from water retention and drainage to root development and nutrient uptake. Understanding these differences is crucial for effective farm management and long-term soil health. In New Zealand, soil structure varies significantly not only between the volcanic soils in regions such as Waikato and Taranaki, and the sedimentary soils found predominantly in areas like Canterbury but also across other soil types such as peaty soils in wetter regions and clay soils in drier areas. Volcanic soils benefit from a loose, porous structure due to the presence of allophane, a mineral that not only enhances soil stability but also aids in significant carbon storage, with carbon levels reaching 10-12%, thereby enriching the soil’s organic content. This structure promotes excellent water retention and nutrient availability, making these soils ideal for high-demand agricultural activities, such as dairy farming. Conversely, sedimentary soils present different challenges. Dr. Rajendram explains, “Sedimentary soils tend to be denser and can suffer from compaction more easily, which reduces aeration and negatively impacts root penetration and moisture permeability.” These soils typically have lower organic matter content, generally around 3-5% carbon, making them more prone to degradation. which can lead to faster degradation and fertility loss over time if not managed correctly. Peaty soils, while excellent for specific horticultural uses due to their high organic matter content, require careful water management to prevent over-saturation, which can suffocate plant roots. Similarly, clay soils, known for their ability to retain water, are advantageous in drier regions but can become hard and crack when dry, posing challenges for root growth and soil aeration. Effective management practices are essential for maintaining the health of all these soil types. Dr. Rajendram highlights that strategies such as regular soil testing, appropriate crop rotation, and the careful application of organic amendments are vital. For volcanic soils, maintaining the structural integrity involves minimal tilling and controlled grazing to prevent compaction. For sedimentary soils, improving structure may involve more frequent organic matter addition and careful water management to avoid surface crusting and compaction. Dr. Rajendram emphasises that by tailoring farming practices to the specific type of soil structure, New Zealand farmers can enhance productivity and ensure the sustainability of their valuable agricultural lands.  Contact Dr Gordon Rajendram 021 466077 rajendram@xtra.co.nz www.gordonrajendramsoilscientist.co.nz Contact Phillip Quay phillip@mediapa.co.nz 027 458 7724 www.mediapa.co.nz

In the verdant landscapes of New Zealand, where agriculture forms the backbone of the economy, maintaining the right balance of nutrients in the soil is critical for both crop yield and environmental sustainability. Dr Gordon Rajendram, a renowned soil scientist, draws attention to an often-overlooked issue: the signs of excessive phosphate levels in the soil, a condition that can have far-reaching consequences for both agriculture and natural ecosystems. Phosphate is an essential nutrient for plant growth, but like anything in excess, it can lead to problematic outcomes. One of the primary signs of too much phosphate in the soil is the inhibition of plant uptake of other necessary minerals, such as iron, zinc, and manganese. This nutrient imbalance can result in poor plant health and reduced growth, a paradoxical situation where more is indeed less. Moreover, excessive phosphate can lead to algal blooms in nearby water bodies, as runoff carries the surplus nutrients into rivers and lakes. These blooms not only disrupt aquatic ecosystems but can also pose a risk to animal and human health. In New Zealand, with its extensive coastlines and waterways, this issue is of particular concern, highlighting the need for careful nutrient management. Dr Rajendram points out that soil testing is a crucial step in identifying excessive phosphate levels. Such tests can help farmers and land managers make informed decisions about fertiliser application, reducing unnecessary inputs and mitigating environmental impacts. Another sign of too much phosphate is the appearance of certain weed species that thrive in high-phosphate conditions. These weeds can outcompete crops and native plants, further disrupting agricultural productivity and biodiversity. Phosphate holds a pivotal role in the tapestry of soil nutrients, serving as a cornerstone for plant growth and agricultural productivity. Dr Gordon Rajendram emphasises the significance of phosphate, noting, “Phosphate is akin to a key that unlocks the energy potential within plants. It’s essential for photosynthesis, energy transfer, and the synthesis of nucleic acids and cell membranes. Without adequate phosphate, plants cannot thrive or produce at their full potential.” In conclusion, recognising and addressing the signs of excessive phosphate in New Zealand’s soils is a critical step towards sustainable agriculture and environmental stewardship. Through careful management and a commitment to balance, the country can continue to thrive both economically and ecologically. Contact Dr Gordon Rajendram 021 466077 rajendram@xtra.co.nz www.gordonrajendramsoilscientist.co.nz Contact Phillip Quay phillip@mediapa.co.nz 027 458 7724 www.mediapa.co.nz

Nutrient leaching from soil is a significant concern for farmers and environmentalists alike, as it represents both a loss of valuable fertilisers and a potential source of environmental pollution. Dr Gordon Rajendram has provided critical insights into this issue, demonstrating that the amount of nutrients lost via subsurface flow is closely related to the amount of rainfall and drainage. In areas where rainfall and drainage range from 500 to 7000 mm per year, particularly from April to October, nutrients can be washed beyond the root zone, where plants are unable to utilise them. This process is especially problematic for anions like nitrates (NO3-) which are highly mobile and tend to leach easily. Anions also carry cations with them, such as calcium (Ca2+), exacerbating the loss of nutrients. For instance, Dr Rajendram’s research indicates that sulphur leaching can be between 40 to 70 kg/ha/year, costing approximately $28 to $49 per hectare annually. When it comes to nitrogen (N), a critical element for plant growth, the figures are even more striking. Without any nitrogen applied, between 21 to 26 kg/ha/year can leach, amounting to around $43 per hectare each year. However, when 200 kg of nitrogen per hectare is applied, the leached amount can increase to about 60 kg/ha/year, with the cost rising to around $125 per hectare annually. And with a higher application rate of 400N, up to 100 kg N/ha/year may leach, costing approximately $209 per hectare each year. Calcium leaching, which equates to the loss of half a ton of lime, is around 150 kg Ca/ha/year, resulting in a cost of about $13 per hectare per year. Other nutrients like magnesium (Mg), sodium (Na), and potassium (K) also experience significant leaching, with costs of $30, $50, and $19 per hectare per year, respectively, for losses of 30 kg Mg, 50 kg Na, and 10 kg K. Dr Rajendram asserts that to mitigate nutrient leaching, farmers need to employ strategic fertiliser management. This includes soil testing to determine the existing nutrient levels, timing fertiliser applications to match plant needs, and using technologies such as controlled-release fertilisers, nitrification inhibitors and management practices such as using standoff pads/herd homes “Effective nutrient management is key to both economic efficiency and environmental stewardship,” Dr Rajendram advises. “By optimising fertiliser use, we can reduce leaching losses, saving both our resources and our rivers.” This holistic approach to agriculture is essential for sustainable farming practices that protect both the productivity of the land and the health of the environment. Contact Dr Gordon Rajendram 021 466077 rajendram@xtra.co.nz www.gordonrajendramsoilscientist.co.nz Contact Phillip Quay phillip@mediapa.co.nz 027 458 7724 www.mediapa.co.nz

In the verdant landscapes of New Zealand, where agriculture forms the backbone of the economy, maintaining the right balance of nutrients in the soil is critical for both crop yield and environmental sustainability. Dr Gordon Rajendram, a renowned soil scientist, draws attention to an often-overlooked issue: the signs of excessive phosphate levels in the soil, a condition that can have far-reaching consequences for both agriculture and natural ecosystems. Phosphate is an essential nutrient for plant growth, but like anything in excess, it can lead to problematic outcomes. One of the primary signs of too much phosphate in the soil is the inhibition of plant uptake of other necessary minerals, such as iron, zinc, and manganese. This nutrient imbalance can result in poor plant health and reduced growth, a paradoxical situation where more is indeed less. Moreover, excessive phosphate can lead to algal blooms in nearby water bodies, as runoff carries the surplus nutrients into rivers and lakes. These blooms not only disrupt aquatic ecosystems but can also pose a risk to animal and human health. In New Zealand, with its extensive coastlines and waterways, this issue is of particular concern, highlighting the need for careful nutrient management. Dr Rajendram points out that soil testing is a crucial step in identifying excessive phosphate levels. Such tests can help farmers and land managers make informed decisions about fertiliser application, reducing unnecessary inputs and mitigating environmental impacts. Another sign of too much phosphate is the appearance of certain weed species that thrive in high-phosphate conditions. These weeds can outcompete crops and native plants, further disrupting agricultural productivity and biodiversity. Phosphate holds a pivotal role in the tapestry of soil nutrients, serving as a cornerstone for plant growth and agricultural productivity. Dr Gordon Rajendram emphasises the significance of phosphate, noting, “Phosphate is akin to a key that unlocks the energy potential within plants. It’s essential for photosynthesis, energy transfer, and the synthesis of nucleic acids and cell membranes. Without adequate phosphate, plants cannot thrive or produce at their full potential.” In conclusion, recognising and addressing the signs of excessive phosphate in New Zealand’s soils is a critical step towards sustainable agriculture and environmental stewardship. Through careful management and a commitment to balance, the country can continue to thrive both economically and ecologically. Contact Dr Gordon Rajendram 021 466077 rajendram@xtra.co.nz www.gordonrajendramsoilscientist.co.nz Contact Phillip Quay phillip@mediapa.co.nz 027 458 7724 www.mediapa.co.nz

In New Zealand, where agriculture plays a pivotal role in the economy, understanding the factors that drive pasture production is crucial for optimising yields and maintaining the health of the land. Dr Gordon Rajendram, a leading soil scientist, emphasises the importance of several key elements in this process, highlighting how the interplay between soil temperature, moisture, pH, nutrient availability, air-filled porosity, and biology can significantly impact pasture growth and productivity. One of the most fundamental factors is soil temperature. Pasture growth notably slows or even halts when the temperature at a 10 cm depth falls to 5 or 6 degrees Celsius. This thermal threshold is critical in New Zealand’s varied climate, affecting the seasonal management of pastures across different regions. “Understanding the structure of soil is key to unlocking the full potential of our pastures. Each element, from temperature and moisture to pH and biology, plays a critical part in this complex melody. It’s through harmonising these factors that we can achieve sustainable and productive agriculture,” – Dr Gordon Rajendram, Soil Scientist Soil moisture is another vital component. Pasture production can be adversely affected when soil moisture levels drop below 25%. This threshold is a clear indicator of the need for adequate water management practices to sustain growth, especially during dry spells which are becoming increasingly common due to climate change. The chemical balance of the soil also plays a significant role. Soil pH and the presence of 13 essential elements are crucial for the health and productivity of pastures. An optimal pH level ensures that these nutrients are available to plants, directly influencing their growth and the overall output of pasture lands. Air-filled porosity, specifically when it falls below 10%, indicates poor soil structure which can hinder root growth and limit air exchange. This condition stresses plants and can lead to reduced pasture yield. A healthy soil ecosystem, rich in microorganisms, supports nutrient cycling and aids in the breakdown of organic matter, thereby enhancing soil fertility and plant health. In conclusion, Dr Gordon Rajendram underscores the need for a holistic approach to managing these factors. By closely monitoring soil temperature, moisture levels and adjusting chemical balance, structure, and biological health, farmers in New Zealand can maximise pasture production, ensuring sustainability and profitability in their agricultural practices. Contact Dr Gordon Rajendram 021 466077 rajendram@xtra.co.nz www.gordonrajendramsoilscientist.co.nz Contact Phillip Quay phillip@mediapa.co.nz 027 458 7724 www.mediapa.co.nz

Dr. Gordon Rajendram, a Soil Scientist with a PhD from Waikato University and AgResearch, stands as a beacon of expertise in soil fertility within New Zealand. His commitment to enhancing the agricultural landscape is evident through his dedication to helping New Zealand farmers and fertiliser companies optimise soil utilisation. By doing so, he ensures farms operate more efficiently and sustainably while boosting profitability. His role as an independent consultant underscores a modern approach where scientific knowledge and ecological responsibility converge to benefit the agricultural sector. His relationship with fertiliser companies across New Zealand is characterised by a blend of rigorous scientific research and practical advice. Dr. Rajendram’s expertise in soil testing allows for the precise application of fertilisers, thus maximising crop yields and minimising environmental impact. His collaboration with these companies extends to the innovation and improvement of fertiliser products, ensuring they are effective and environmentally safe. With over 70 publications and six patents, most of which were achieved during his 22-year tenure at AgResearch, Ruakura Research Centre, Dr. Rajendram’s contributions to the field are substantial. His development of two field-calibrated soil tests for Nitrogen and Sulphur, now included in the Overseer nutrient model, and his research on nutrient leaching are pivotal for agronomic advice in New Zealand. His work has not only been applied across the agricultural industry but has also garnered recognition, including nominations for the Kudos Awards as Scientist of the Year in 2008 and Science Entrepreneur of the Year in 2010. Dr. Rajendram’s consultancy transcends technical advice, engaging in educational initiatives aimed at disseminating research findings and best practices. His relationship with the fertiliser industry and the agricultural community at large is a testament to his passion for marrying science with sustainability, making him an invaluable asset to New Zealand’s agricultural advancement. In this enhanced agricultural narrative, Dr. Rajendram’s work symbolises the nexus of commercial objectives and environmental stewardship. Through his endeavours, New Zealand’s fertiliser industry and farming practices are steered towards a future where productivity and sustainability are in harmony, ensuring the sector’s resilience and profitability for generations to come. Contact Dr Gordon Rajendram 021 466077 rajendram@xtra.co.nz www.gordonrajendramsoilscientist.co.nz Contact Phillip Quay phillip@mediapa.co.nz 027 458 7724 www.mediapa.co.nz

Soil Scientist Dr. Gordon Rajendram delves into the intricate interplay between soil structure and the vitality of the agricultural ecosystem, asserting that the essence of productive farming and environmental sustainability lies beneath our feet. The structure of soil, a complex arrangement of particles and spaces, is foundational for water retention, nutrient cycling, and the support of plant life. However, this delicate equilibrium faces threats from pollutants and suboptimal farming methods, leading to significant concerns for soil health, crop productivity, and ecological balance. Highlighting the adverse effects of industrial pollutants, agricultural runoff, and the overuse of chemicals, Dr. Rajendram points out how “these elements severely disrupt the soil’s microbial community. Such disruption is hampering the decomposition of organic matter and the cycling of nutrients, elements crucial for maintaining soil structure and fertility.” The consequence of this disruption is a soil system that is less resilient, more prone to erosion, and increasingly ineffectual at supporting agricultural demands. Moreover, Dr. Rajendram sheds light on how neglectful soil management practices—such as the excessive use of heavy machinery and inadequate replenishment of soil organic matter—contribute to soil compaction and diminished aeration. These conditions create a hostile environment for root growth and water infiltration, further straining the ability of plants to access essential nutrients and moisture, thereby impeding their growth and reducing yields. In response to these challenges, Dr. Rajendram champions a shift towards more sustainable farming practices that honour and nurture the soil’s natural processes. He advocates for regular soil testing as a crucial diagnostic tool to identify contaminants and assess nutrient profiles, enabling the implementation of targeted interventions. Emphasising the reduction of chemical inputs, the enhancement of soil organic matter through practices like composting and mulching, and the adoption of conservation tillage, Dr. Rajendram proposes a holistic strategy aimed at revitalising soil structure and promoting resilience. Incorporating eco-friendly products and adhering to sustainable soil management practices, according to Dr. Rajendram, are not merely actions to restore and protect soil health but are fundamental steps towards achieving broader environmental goals. These include preserving biodiverse ecosystems, improving the sequestration of carbon to combat climate change, and ensuring the longevity and productivity of agricultural lands for future generations. Contact Dr Gordon Rajendram 021 466077 rajendram@xtra.co.nz www.gordonrajendramsoilscientist.co.nz Contact Phillip Quay phillip@mediapa.co.nz 027 458 7724 www.mediapa.co.nz