increase font size
Dr Jacqueline Rowarth.
Could 2020 be the year of New Zealand ‘generative agriculture’?
OPINION: A new thought for the New Year – New Zealand ‘generative agriculture’… or New-gen, for short.
New-gen captures New Zealand’s approach to the soil-plant-animal-environment continuum that makes up agriculture: animals have been moved in herds or flocks around the farm or station, enabling them to graze the pasture at its optimum quantity and quality and return dung and urine to the soil in situ. Earthworms have been introduced to enhance organic matter incorporation into the soil and water has been applied in some areas to overcome drought. The result is that organic matter has been maintained or increased.
Efficiencies developed over the past 100 years have been based on science, informed by research, and honed by farmers.
New-gen picks up on the interest in regenerative agriculture, but repositions New Zealand as the leader in achievement – the point being that you can’t RE-generate something unless it is DE-generated. New Zealand does not have deserts, desertification or dust bowls. That’s in contrast to some parts of Africa, America and Australia from where the proponents of regenerative agriculture come.
New Zealand does have drought-sensitive areas, which could degenerate if not looked after appropriately. The Landcare Research website suggests that there are 50,000 km2 of dryland ecosystems in New Zealand, derived from fire-sensitive shrubland and dry forest ecosystems – mostly on the East Coast of both islands.
Of note is that they are less than 800 years old, indicating that humans have been involved in their creation. Just as they were in the more recent development of the American dustbowl (and in some of the examples of desertification in Africa and Asia). Environmental concerns have been raised about agriculture on dryland areas, but these concerns overlook the fact that the landscape was altered several hundred years ago by the first human arrivals.
Regenerative agriculture on degraded soils overseas has used a combination of animal management, fertiliser and irrigation to rebuild organic matter. What has been achieved, however, is still below what most of New Zealand already has, even in the dryland areas.
Some research overseas is already pointing to a limitation in regenerative agriculture in that after a few years, organic matter stops increasing. Work in New Zealand has shown why – a dynamic equilibrium between inputs and outputs is reached. To alter the equilibrium requires another change – increasing inputs or decreasing outputs.
Decreasing outputs means less food, which is not what the world desires.
The question now should be what to do for the future.
The Food Climate Research Network, based at the University of Oxford, has stated that increased production must be met through higher yields. The alternative is increasing the area of land in agriculture but doing so has major environmental costs in biodiversity – as well as soil carbon loss. The network has also explained that Sustainable Intensification denotes a goal but does not specify a priori (that is, based on theory rather than observation or experience) how it should be attained, or which agricultural techniques should be used.
“The merits of diverse approaches in different locations and context should be evaluated carefully, taking biophysical and social contexts into account.”
In short, there is no one-size-fits all for Sustainable Intensification. Knowing the starting point, as well as the possible input and output factors, are vital, so is knowing the global trends in temperature, water availability, energy and consumer thinking.
New Zealand has scientists focussing on all the important aspects. And New Zealand has farmers who deserve to be acknowledged for their contribution to the environment and economy.
New-gen is for farmers wanting to continue doing the right thing by the environment while supporting food supply. New Zealand researchers can show the way, using New Zealand farmers as the example.
New-gen – it’s what we do.
• Dr Jacqueline Rowarth is a soil scientist with a PhD in nutrient cycling. Her research has focused on phosphorus, nitrogen and carbon.
Scientists from the Ministry for Primary Industries (MPI) are part of an international team working to develop a low-cost diagnostic tool that could significantly improve food crop production in developing countries.
Scion is running experimental research burns near Christchurch from March 3-14, to test new theories on how wildfires spread under various conditions.
OPINION: Before we all let The Green Party have at it with their 'bold' emissions reduction plan, the Hound thought it wise to run the numbers through the old Casio.
Environment Southland says it has now ring-fenced $375,000 for new funding initiatives, aimed at enhancing water quality.
Farmers have welcomed the Government’s move designed to limit farm to forestry conversions entering the Emissions Trading Scheme (ETS).
The DairyNZ Farmers Forum is back with three events - in Waikato, Canterbury and Southland.
To celebrate 25 years of the Hugh Williams Memorial Scholarship, Ravensdown caught up with past recipients to see where their careers have taken them, and what the future holds for the industry.
Among this year’s Primary Industry NZ (PINZ) Awards finalists are a Southlander who created edible bale netting and rural New Zealanders who advocate for pragmatic regulation and support stressed out farmers.
Rockit Global has appointed Ivan Angland as its new chief operating officer as it continues its growth strategy into 2025.
Nominations are now open for the Horticulture New Zealand (HortNZ) board.
A Mid-Canterbury dairy farmer is bringing a millennial mindset to his family farm and is reaping the rewards, with a 50% uplift in milksolids production since he took over.
