Planting

• Conventional treatment: ploughed, disced x 2, power-harrowed, peas drilled, rolled
• Hybrid treatment: peas direct drilled, rolled
• Regenerative treatment: not planted in peas

Winter cover crops in both the Conventional and Hybrid treatments were sprayed out early, and the soil stayed wet. The Conventional treatment was encouraged to dry by cultivating to ‘open up’ the soil. The Hybrid, which was not cultivated, remained very wet, making the soil more vulnerable to compaction at planting. The soil was wet enough to leave defined drill lines, and in some places open slots.

We decided not to plant the Regen treatment in early peas. We wanted to avoid driving on wet soil with heavy machinery, minimising compaction, and retained the soil in a ‘restorative phase’ for longer, ahead of planting beans in late December.

Crop Monitoring

The impact of planting into wet soil in the Hybrid treatment was seen almost immediately. Establishment was slower, and the plant population significantly lower than the Conventional treatment.

We saw similar trends in canopy cover percentage, with the Hybrid treatment lower than the Conventional one. The Regenerative cover crop was mulched on the 1st of October to stop the radish component of the cover crop mix from flowering. The residue was later disced in to mix soil with the residue and speed up breakdown. That was not been sufficient to kill the oats in the multispecies cover crop, and the regrowth required ongoing management.

Both the Conventional and Hybrid treatments had one post-emergence herbicide application (Bruno + Quantum). No pre-emergence herbicide was applied due to lack of forecast rain early in the season.

The dry weather through November brought forward our harvesting date. A fungicide application was recommended, but we were too close to the 14 day pre-harvest interval so none was applied. Disease pressure was low so we had few issues.

The dry spring meant the irrigator has been consistently running. Between planting on the 3rd of September and harvest on the 27th November we received 46.7mm of rainfall. The irrigator made six passes and applied approximately 96mm of irrigation.

Harvest took place on the 26th of November, read more in our harvest article!

The post 2024 McCains Pea Production appeared first on LandWISE - Promoting sustainable land management.

Ahead of the machine harvest, in each plot we hand harvested all of the pea vines from four 2 x 1m2 subplots. The plants were taken to the McCains mini-viner in Waipawa where the peas were separated from the pods and the vine, and weighed to determine yield.

A subsample of the peas was used to determine the Tenderness Rating (TR). TR is a key factor in determining the price paid for process peas. Generally, a higher price is paid for lower TR peas, as the yield is typically lower. Subsamples were also collected for laboratory analysis, and for drying to determine dry matter content.

Some results!

We are still processing samples and awaiting laboratory results, however we can share the following.

Our Conventional treatment on average produced a paid weight of 5.74 T/ha, and the Hybrid treatment 4.69 T/ha. This is not unsurprising considering the slow start the peas in the Hybrid treatment had (see previous post).

The average Tenderness Rating (TR) for the Conventional treatment was 104, and the Hybrid slightly lower at 96. This means that the Hybrid yielded a higher price per ton than the Conventional.

At this stage, the estimate of income received from the peas is approximately $4290.20 for the Conventional treatment and $3797.50 for the Hybrid. We are still finalising input costs, and will report on margins later in the year. The Hybrid treatment did have a lower cost of production than the Conventional, so it will be interesting to see final gross margins.

Next Steps

We are due to plant our beans on the 28th of December. We have completed our post-harvest operations, which has included baling the vine on the Conventional treatment followed by disc ripping. The Hybrid was disc ripped to incorporate the vine, with the aim of retaining nutrients, particularly nitrogen. The Regen treatment was also disc ripped to mechanically kill the oats which had regrown.

The aim of disc ripping is to attend to any compaction, bury any residues, and level the surface as much as possible ahead of planting beans.

A big thanks!

As always, we want to thank our dedicated operations advisory team for their input into our pea crop.

This includes Mike Flynn, Ben Prebble, Allan Machakaire, Scott Marillier and Renee (McCain Foods), Bruce Mackay (Kraft-Heinz Wattie’s), Gareth Holder (Redloh), Scott Lawson (True Earth), Phil Schofield (Reset Regenerate), Shelley Bath (Horticentre) and Mike Kettle (Mike Kettle Contracting). We would also like to thank Jonny Wilson for completing the disc ripping, and navigating our small plots with very long equipment!

The post 2024 Pea Harvest Results appeared first on LandWISE - Promoting sustainable land management.

Two suggested approaches for increasing biodiversity caught our attention. Over the last six months, we have been exploring their implementation at the MicroFarm. We are enormously grateful to Olivia Prouse for supporting our biodiversity journey so far. We are also grateful to Richard Mills from Summerfruit NZ for leading the way in Hawke’s Bay, and showing us the importance of just giving something a go! We also extend our gratitude to other growers engaging in this initiative, who have been sharing their experiences.

Mobile Insectaries

Mobile insectaries (moveable pods) aim to provide a source of shelter, nectar, alternative hosts and pollen (SNAP) for beneficial insects. The concentrated areas of SNAP support natural enemies, which can aid in pest control in vegetable crops. The moveable pods can be moved in and out of crops easily during the year.

Following the detailed ‘how to’ guide provided by ALT, with additional support from Olivia Prouse for plant selection, we built four moveable pods. Each pod has native five plants, all selected to flower at different times of the year. The species selected were mainly plants that had small flowers to provide habitat to small predatory wasps and other small insects which cannot feed on large flowers like commonly grown manuka.

We have been monitoring the pods to see what is flowering each month. While there is some maintenance required for weeding and watering, all plants survived the winter and are thriving this spring. We are excited to have species like Pimelea mimosa, which is a native daphne, naturally found only on Te Mata peak, and to have two species of Muehlenbeckia, which provides a food source for NZ native copper butterfly.

Annual Flower Strips

The aim adding annual flowering strips to a farm is to enhance above ground diversity. Again, this increases the diversity of natural pest insect enemies, providing additional pest control.

At the MicroFarm, we had two specific areas that made for good candidates for annual planting strips. The first is along our driveway, an area which is normally sprayed year-round for weeds. The second is under the irrigator guide cable, another area that gets sprayed, particularly in the spring and summer when the irrigator is running.

Using the ‘how to’ guide from ALT, we have planted a variety of annual flowers in these areas to see what might be suitable. In late September, we planted nine 10 m long plots of annual flowers, each with different combinations of species planted. The rest will planted by early December. We have been monitoring what is growing and what is flowering, and are excited to see insects present and a range of different colored flowers along the driveway.

What’s next?

We continue to monitor the moveable pods and annual flowering strips. We hope that our late plantings will persist through the summer and autumn. While not formally part of our main Carbon Positive project, it is a nice supplementary demonstration. We hope to showcase the ALT guides and provide some regional information about what may be suitable to grow (annuals and perennials) here in Hawke’s Bay. Read more about our journey in the latest A Lighter Touch newsletter here!

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The current approach to assessing earthworms is through field visual assessments, which can be labour intensive and requires expert knowledge in identifying species. The new test provides a convenient and efficient alternative for earthworm testing.

The soil test has been calibrated for 7.5 cm soil depth in pastoral settings, rather than the 15 cm depth which is the standard depth for horticultural and arable soil tests.

We have been working with Dr Nicole Schon at AgResearch, who helped to develop the test, and Hill Laboratories to better understand how the test might be relevant within a cropping context.

This month, we completed our six-monthly Visual Soil Assessments in the Carbon Positive plots. As part of this process we sent all earthworms found to Nicole for identification, and soil samples to Hills to test for A. caliginosa eDNA. We hope that these samples will help to strengthen the understanding of the soil test taken to 15 cm depth.

Check out Alex and Nicole’s article in the latest NZ Grower magazine (pg. 48-50) for more discussion, or the Hills technical note for more details.

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In the above picture, you can see our McCain Foods pea crop planted into cultivated (Conventional treatment) soil on the left, and into sprayed our mixed cover crop (Hybrid treatment) in the centre. The golden patch is mixed cover crop residue in the Regenerative treatment plot that was mulched on 1 October. Some of the oats, tillage radish and other species remain alive under the mulch.

To completely terminate the cover prior to planting green beans in December, the Operations Advisory Group has decided to run disks over the plots to mix soil into the mulched residue to hasten its breakdown. They recommend spraying urea and a digester on to the residue first, to support the microbe population increase needed to chew through about 11 t/ha of biomass dry matter.

One of our big unknowns, is whether we can terminate the cover crops using a roller-crimper. Our literature and phone-calls-to-farmers research suggest timing is absolutely critical, and it is unlikely multiple species will be just right on the same day. We found for example, that the tillage radish was setting seed while the oats were not sufficiently mature for crushing. In our Regenerative treatment plots, we decided to mulch the five-species mix to avoid adding a gazillion radish seeds to our already well-stocked seed-bank.

We have also started termination programmes in the extra cover crops we planted. One crop is the same five-species mix as in the Carbon Positive Regenerative and Hybrid plots. Another is rye corn, one has straight tic beans, and one has tic beans and rye corn.

These crops were planted so we can try things without affecting the Carbon Positive plots. We started crushing strips with a roller-crimper on 10 October and will do more strips over the next few weeks. We are also considering mulching some and spraying any regrowth.

The images below show the bruised bars in the cover crops after roller-crimping. The theory is that once plants reach physiological maturity and flowering, they will not continue new vegetative growth if damaged. Bruising is thought better than cutting.

Thanks to TRS in Hastings for providing the tractor and crimper for these trials. We will be demonstrating it working at our Field Walk on Tuesday 15 October at the LandWISE MicroFarm. Everyone is welcome – but please register for free.

This work is being completed as part of the MPI Funded Carbon Positive project, a joint programme with the Hawke’s Bay Future Farming Trust. We a grateful for our industry sponsors and everyone who contributes through advisory groups, being tolerant contractors, and in many small ways!

The post Cover Crop Update appeared first on LandWISE - Promoting sustainable land management.

Pea Planting

The Conventional treatment, which was planted in annual ryegrass, was sprayed out one month ahead of planting, then ploughed, disced (x2) and power harrowed in preparation for planting peas. The Hybrid treatment, which was planted in a diverse mix of mainly black oats, tillage radish and vetch, was sprayed out one month ahead of planting, with the intention of letting the cover crop rot down and peas were direct drilled. The Regenerative treatment was not be planted in peas, and instead left in a restorative phase for an extended period, whereby some of the intensity is reduced from this system.

We ran into some roadblocks in the Hybrid. As the consequence of spraying out early was that there was no evapotranspiration from the crop, so the soil was slow to dry after rain. We didn’t want to cultivate this treatment, therefore didn’t have the option to speed up drying through ‘opening’ the soil. In our ‘dry runs’ with the planter, a distinct slot was created, which would mean the soil to seed contact would not be good. It would also create a nice little home for slugs. To keep with our production plan, we delayed our planting date to get a bit more drying time, so the soil was dry enough for some tilth to be created.

Additional seed treatment

The Hybrid seed was treated with Trichoderma, based on promising trial results from Wattie’s in Canterbury. This was added to the seed, on top of the standard McCain seed treatment. The Hybrid was drilled through the standing sprayed out cover crop, so the residue was anchored, and then mulched after planting. The main concern with leaving the cover crop standing is that some of the tillage radishes had popped out of the ground. If left standing, they could be picked up by the harvester and end up at the factory.

Pūkeko as far as the eye can see

In the days after the peas started to emerge, we found the treatments overrun with pest animals – pūkeko, rabbits, sparrows and pigeons. This is perhaps to be expected, however as each plot is only 0.1ha, every plant is precious! We actively managed these pests to minimise the damage. As a result, we have seen a few more hawks around, which is hopefully deterring some of the unwanted bird life.

Soil Temperature

Soil temperature in the planting line was recorded every 15 minutes for three weeks from planting. using iButton microloggers. Soil temperature in the Conventional treatment (cultivated/bare soil) was consistently higher than the Hybrid (direct drilled/mulched).

Pea emergence

Plant emergence has been monitored since the 24th of September. Four x 1m² quadrats are counted in each plot, each day to monitor the rate of emergence. Plants are counted when the first leaves have unfurled/flattened. The Conventional treatment population is higher and more uniform than the Hybrid, which has been slower to emerge. This is likely to be related to lower soil temperature and soil conditions at planting.

Upcoming field walk

Our next field walk will be at 1pm on the 15th of October. Come along and join the conversation! Register here!

The post September 2024 at the MicroFarm appeared first on LandWISE - Promoting sustainable land management.

What to plant?

First off, what should we plant? I don’t think we have yet got our cover crop mixes quite right. This year, our hybrid and regen treatments were planted in a diverse mix of 7 species (black oats, tillage radish, vetch, buckwheat, sunflowers, crimson clover and Persian clover). This was to get lots of plant diversity over the winter.

A frost in May killed the buckwheat and sunflowers, which meant they weren’t present over the winter. We planted tillage radish as it is supposed to be the “crowbar of the soil” and will break through tillage pans. Unfortunately, our radishes knew better, hit the pan and, in some areas, popped themselves 10cm out of the ground. This is potentially an issue for both the hybrid and the regen treatments, as chunks of radish could be picked up by the harvester and end up at the factory which may be a problem for product contamination.

Additionally, the radish started to flower and was beginning to set seed, so radish if unmanaged, could have become be a new weed species for us.

In this conversation, there is the question of how much plant diversity do we need? Some of the species we are using, might be okay in a pastoral grazing scenario, but could be hard to manage in a cropping system and therefore become a weed for us. In the systems we are looking at, are we able to select fewer plants, that provide functional diversity, without adding added complexity of to the management of the cover crop?

Another consideration is disease carry over. We intentionally avoided planting tic beans this year, as they could carry unwanted diseases into the following legume crops. Tic beans may be an option ahead of other crops.

Do we graze?

One of the five regenerative principles is to integrate livestock, which we have not yet done in our Regen treatment. However we have grazed our Conventional treatment, which might seem a bit backwards. It is common for Heretaunga Plains growers to plant an annual ryegrass over the winter and graze it with lambs, so we are including sheep in our Conventional treatment.

In the last two years, we wanted to use the cover crop as a mulch on the surface for our main crop to keep the soil surface covered, another of our regenerative principles. If we have a mulch on the soil surface, we hope it will significantly reduce the need for herbicides. To do this effectively, we need to grow a lot of biomass, and therefore don’t want to have sheep or cattle grazing it. We don’t really have a long enough winter growing season to do both. This is where we find tension between some of the regen principles when applied to an annual cropping system. We might yet include livestock; however, we aren’t sure what this will look like in practice.

In addition, lambs can do considerable soil damage over the winter. The photos below show the difference between grazing for a couple of weeks in dry conditions and grazing over a wet weekend this winter.

When to terminate?

Ahead of the tomato planting last year, we had a cover crop of oats, vetch and lupins in the Regen treatment. You may remember that we planned to use a modified tomato planter, which transplants seedlings directly into a mulched cover crop, eliminating the need for both cultivation and herbicides. Just before planting, we met two problems with this plan.

The first issue was that the cover crop was still actively growing and sucking moisture out of the soil, so the soil was very dry in the regen treatment. This led to large, blocky clumps of soil forming in the top 10cm of the profile. The second issue was that the timing of maturity wasn’t right for mulching and killing the oats. In a test area of cover crop, we found the oats regrow, and we had very limited herbicide options to deal with this. It might have worked if we had waited a couple of weeks, however we were working with a factory schedule and had a planting date that wasn’t very flexible.

We want to apply lessons from that experience this year. We are already seeing low soil moisture levels and low nitrate levels in the Regen treatment. To manage the amount of biomass we have grown, and stop the flowering radish from seeding, the cover crop was mulched on the 1st of October. We expect the mulching will not kill the oats, and that we will need to manage regrowth.

How to terminate?

We planted a winter cover crop, it has grown all winter, so what next? Our Operations Advisory Group is having an ongoing discussion on how we terminate it in our Regen treatment. The initial plan was to use a roller crimper, but the consensus is that this is probably not quite the right tool for the job. We have since mulched the cover crop, but we will need another action to terminate it (oats weren’t mature enough). We have two options; we either spray out the oat regrowth or we cultivate to bury the residue.

This is an important conversation for us, as the use of glyphosate is not widely accepted by the Regenerative community. But our discussions with no-till or minimum tillage growers, and some of the Canterbury regenerative croppers, show it is an important tool for successfully reducing or eliminating cultivation. Most of the literature indicates that cultivating is the number one thing to avoid if we want to increase soil carbon, which is the main metric in this trial.

Weed management is a key consideration in beans as there are few herbicide options. If the crop is too weedy it won’t be harvested. If we cultivate, we will have to manage weeds through a suite of other herbicides that have the potential to as harmful as, or worse than glyphosate when compared using the Environmental Impact Quotient.

How do we best minimise soil disturbance? Both cultivation and herbicide use fall into the category of soil disturbance. The question for our operations group comes down to what is the ‘lesser of two evils’- glyphosate or cultivation?

More questions than answers!

A key lesson from the last two years, is that cover crops are important. We have also found that cover crop management is quite complex. There are a lot of questions we need to ask ourselves:

The post Lessons from two years of winter cover crops appeared first on LandWISE - Promoting sustainable land management.

As I grapple with my own understanding of Regenerative Agriculture (RA), a trip to Europe was just the thing I needed to provide me with more questions than answers!

1. What are the right policy tools to support both sustainable food production and growers making a livelihood?
2. How does RA scale to go beyond a ‘buzz word’ to have a meaningful impact on the environment?
3. What role do large corporations play in the transition to Regen Ag?

EU Green Deal- Farm to Fork Policy

In 2020 the European Union introduced the Farm to Fork (FTF) policy as part of the EU Green Deal. The policy aims to rethink the whole food value chain, minimise the environmental impact of food production, improve resource efficiency and enhance biodiversity.

Targets set by the FTF include:

• 50% reduction in the use and risk of chemical pesticides by 2030
• 50% reduction in nutrient losses, while ensuring no deterioration in soil fertility by 2030
• 20% reduction in fertiliser use by 2030
• 50% reduction in the sales of antimicrobials for farmed animals and aquaculture by 2030
• 25% of total farmland to be farmed organically by 2030 (9.9% of farmed area was under organic farming in 2021).

These are ambitious targets. In response to these targets, European businesses of all sizes are having to rethink what ‘the system’ looks like in the future and how they fit into food production not only in the face of environmental policy like the FTF, but also in a changing natural environment.

“Regenerative practices are for the future, not for today”

A quote by Tony Salas (founder of Shared X, Peru) at the 2024 IFAMA Conference in a session dedicated to discussing the future Regenerative Agriculture. Shifting from conventional growing methods to regenerative methods shifts the focus from yield, to the management of a functional ecosystem with an emphasis on healthy soils.

Salas reflected on the challenges that the Organic Agricultural movement has had in scaling globally, in 2021 only about 1.6% of total agricultural land was managed organically, and in global food sales organic produce accounted for 1-2%. Such challenges include regulatory barriers, reduced yields, market and distribution challenges and lower profitability.

So what should the regenerative system approach be? How do we scale RA to improve ecosystem and soil health, AND ALSO feed a growing global population, meet increasingly stringent regulatory targets and provide farmers and growers with a good income? Three key points stood out;

1. Focus on adopting a continuous improvement model (Plan>Do>Check>Act) at all stages of the food-value chain
2. Develop flexible standards and avoid exclusive certification
3. Actions must be underpinned with a focus of minimising agricultures contribution to climate change.

“From ‘producing more with less’ to ‘producing more and restoring more’.”

A comment from Kai Wirtz from Bayer, one of the worlds largest agri-chemical companies. Bayer are putting Regenerative Agriculture (RA) at the heart of their company, with a vision to restore nature, and scale regenerative agriculture. They believe that it is possible to grow more using regenerative practices. Their sustainability commitments include reducing GHG emissions per kilogram of crop by 30%, reducing the environmental impact of crop protection by 30%, and supporting 100 million smallholder farms in low and middle-income countries.

Bayer has a global footprint, and they see their portfolio of products and technologies being integrated into regenerative agricultural systems, taking a multi-crop/multi-season approach to farming. This portfolio includes biologicals, crop protection, advanced seed breeding and digital tools.

“Regenerative agriculture is not a destination but a path”

I have arrived home with more questions than answers.

Europe appears to be leaning into regenerative agriculture in a big way, in response to not only stricter environmental policy, but also in what seems to be reasonably genuine concern for the future of the planet and our collective ability to feed a growing population. Large companies (like Bayer) are positioning themselves in the market to support growers in implementing regenerative practices to suit their individual farm systems in countries around the world. We see this in platforms like the Sustainable Agricultural Initiative (SAI), who have signed on over 180 global companies, with the shared goal of transforming agricultural practice for a more sustainable future.

Back in New Zealand, I wonder if we are taking regenerative agriculture serious enough? There are many unknowns, we don’t really know how RA works in NZ farm systems (though we are trying to find out) and change is scary – I find that in our own project. However, I think we know enough to have a go, to start exploring ways of improving management practice to restore ecosystem and soil health.

How do we scale regenerative agriculture in a way that we have meaningful impact on restoring the environment? How do we access the technologies being developed overseas to support change? What does the future of market access look like if we don’t adapt? What does the future of our environment look like if we don’t start to look after our soils?

Or to put it more positively, what does the future look like if we do start to look after our soils? What are the possibilities?

Some other interesting business to explore

• Koppert– Global biological company
• Biobest– Sustainable crop management
• Kimitec– Biotechnology company
• Biorizon– Biotechnology company

The post More questions than answers – Regenerative Ag appeared first on LandWISE - Promoting sustainable land management.

Most of June has involved watching cover crops grow! but we also completed a series of soil measurements including visual soil assessments (VSAs) and worm counts, and we have sampled for labile soil carbon.

To monitor the cover crops’ development, we have made weekly ground cover measurements since germination using the smartphone Canopeo app. Canopeo allows us to track growth many times without disturbing the crop in our key measurement plots.

We saw that the annual ryegrass in the conventional treatment plots reached a high ground cover percentage faster than the mixed oats, radish, vetch, sunflower mix in the hybrid and regenerative plots which are relatively sparsely planted. By the end of June, there was less difference, and the cover crops are much taller than the ryegrass. We intend grazing the ryegrass with lambs once the soil dries out some! The mixed covers will not be grazed. We will make harvest cuts and determine the actual dry biomass in all the plots before we terminate the cover crops.

We think we are starting to see changes in the VSA tests, generally in a positive direction. Three examples are shown below. But remember, one image from a test at one time of year is not enough to give statistically relevant answers!! What we do see is that annual ryegrass can give good nutty structure quite quickly. Given the different cultivation that the treatments were given before tomatoes, we are not too surprised to see some differences. The hybrid plots suffered from a rotary hoe while the soil was still wet, and the subsequent pan development remains noticeable. The soil moisture was ideal for VSA when we did these in early June, and that will have helped increase scores relative to those we did in wet soil in previous seasons.

Carbon in the soil takes many forms, including mineral/inorganic calcium carbonate, the main component of limestone. The organic carbon components are often thought of as fitting into one of two pools: the “stable” and “labile” fractions. The stable fraction, which may be protected by clay minerals or soil aggregates, or be chemically persistent, takes years to centuries to decompose and to build up so annual changes are very small. Labile carbon breaks down in days or years and is the portion of soil organic carbon that consists of soil microbial biomass carbon, dissolved organic matter, and easily oxidative organic matter. Because it can be readily decomposed by soil organisms, it is the fraction of soil organic carbon with the most rapid turnover times, and its oxidation drives the movement of CO₂ between soils and atmosphere. It is an active source of nutrition and an indicator of change in the soil.

We are sampling all carbon at the beginning, middle and end of the Carbon Positive project. We are sampling for labile carbon a couple of times each year, basically in spring and autumn. We have been taking labile samples to 60cm depth, split into 0-15, 15-30, and 30-60cm bands. These are the very active root zone in the cultivated depth and the area below it, which still has significant root and micro-organism activity. As well as Hill Laboratories’ measurement of labile carbon percentage using the Hot Water Extractable Carbon method, we are determining the actual soil bulk density so we can accurately assess the tonnes of labile carbon per hectare. Hill Labs has a very informative technical note on soil carbon tests.

We also completed the Milestone 7 report which gives a lot of information about the development and outcomes of the process tomato crops we grew with Heinz-Watties last summer. Now we are reviewing our plans for the coming season and making sure things are ready.

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Many thanks to everybody involved in our 2024 Annual Conference! All up we had 99 registrants who heard from 23 amazing presenters and saw 9 different practical demonstrations. Our special thanks to everyone who contributed by sharing their knowledge and experiences, and to delegates for their active interaction. Thanks to Pure Catering and our hosts at the Havelock North Function Centre and at the Centre for Land and Water which hosts our MicroFarm and the demonstrations.

Many thanks also to our conference sponsors and supporters. These organisations support us through the year as well as for the conference and we are very grateful. They are the most loyal of partners we could hope for.

Ka mau te wehi!

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