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"The Hetheringtons at Walma"


Guided by the principle, ‘You can’t manage what you don’t measure’, Rob Hetherington took his first soil sample in the 1980s, when he began managing the family farm in the Lakes district of the south-eastern wheatbelt, Western Australia. Since then, Rob has collected hundreds of samples, which help him achieve his goal of farming ‘deeper’ to improve the health of the soil and plants, rather than expanding.

Surrounded by salt lakes, some of the area is high in sodium. Other areas were typically known as “Sunday Country” to describe the accelerated drying effect observed in these soils, where higher magnesium has caused the clay particles to disperse (‘Saturday it’s too wet, Sunday it’s just right, and Monday it’s too hard’).

Since the 1980s, Rob has been tweaking practices on the farm. He says observing that the farm system could be doing better is, ‘probably what’s driven me more to keep looking and seeking and asking’. But, it was also the health of Judi and their children that was a real trigger for Rob to begin his life-long interest in soil health and its relationship to plant nutrition and human health.

After learning from leading thinkers such as Dr Arden Anderson and Neal Kinsey, and visiting an Amish farm in America, Rob began work to improve the soil. His learning also led him to understand calcium as a pivotal element.

His approach was to change the chemistry first, which would then provide the right conditions for the biology to function.

Rob now sees signs of a more resilient landscape, with improved aeration, root growth, earthworm density, soil depth, and water infiltration. His crops are more even, and he is pleased with the softness, colour and even smell of the soil. In some areas, organic matter has doubled.

Some walked off the land, but Rob’s father stayed on. The Hetheringtons have faced the decision about whether to stay or leave several more times over their 40 plus years on the farm, but they have persisted. ‘It’s in Rob’s DNA’, says Judi. And Rob has a mission to improve the health of the soil and nutrition of the crops, a mission which has recently seen him named 2022 Wheatbelt NRM Soil Health Champion.

Check back soon.

We’ll soon release the full case study which will include practice changes, soil health and building outcomes. Follow us on social media or subscribe to our newsletter to hear the latest.

Farm Facts

Nyaki-Nyaki Country | Lake King, WA
Annual Rainfall
Agro-climatic region
Climate zone 4: Hot dry summer, cool winter
Property Size
2,500 Ha
Social Structure
Family owned and operated
Enterprise Type
Cropping: summer and winter grains, oil seeds, and legumes. Multispecies, companion and single species
Lakebank Morrell soils, Mallee clays, Gravel and Sandy gravel and Sand

*Learn more about soil classifications at Soil Science Australia

Nyaki-Nyaki Country | Lake King, WA
Annual rainfall
Agro-climatic region
Climate zone 4: Hot dry summer, cool winter
Property size
2,500 Ha
Social structure
Family owned and operated
Enterprise type
Cropping: summer and winter grains, oil seeds, and legumes. Multispecies, companion and single species.
Lakebank Morrell soils, Mallee clays, Gravel and Sandy gravel and Sand.

*Learn more about soil classifications at Soil Science Australia

The Hetherington’s story

Catalyst for change

1940 – 1990

Family farm and early enterprises

Rob grew up on the family farm located in the Lakes region of the South-eastern wheatbelt, Western Australia (see Figure 1 for property location). Rob’s father Wally, purchased the ‘Home’ property in the late 1940s and a nearby ‘Block’ in 1962. By then Wally had married Mary, and had a growing family.

Rob and his brothers, Bruce and Grant, helped Wally clear the new land of Salmon gum and mallee. Like many in the area, their enterprises were dictated by the market and what the Agriculture Department made available. They grazed sheep for wool and cropped wheat, barley and some oats. The standard rotation was two years of pasture for sheep and one year of crop.

In 1973 at the age of sixteen, Rob joined his father full time. Rob didn’t have a particular interest in farming, he wanted to join the army, but reflecting on growing vegetables as a young kid, he says ‘I suppose it was within me then to grow things.’

During this time, Rob’s father made the farming decisions. Not afraid to try something new, he was ‘pretty progressive for his time.’ ‘He was successful at what he did and worked with what he had around him… and was also good with getting the right time for things.’

A challenging landscape: Salt lakes and “Sunday Country”

Being near the salt lakes, much of the land on the ‘Home’ property is high in sodium. Excess sodium can cause structural changes to the soil which in turn compromise a plant’s ability to uptake water. High levels of sodium can also interfere with the uptake of other cations (positively charged atoms) – especially calcium, potassium or magnesium – resulting in poor plant growth. During the Great Depression in the 1930s soil assessments concluded that the area was unfit for farming. This ‘put the wind up’ some people who walked off the land. But Wally was one of those who ‘stuck it out’. He was advised by the agriculture department not to clear one area due to the salty soils, but he did anyway. And after the family learned to work with these soils (e.g. applying foliars), they are now some of the farm’s best.

The ‘Block’ property has high magnesium levels. The challenges that come with farming this type of landscape were clear to Rob from early on. Rob recalls looking over land that he and his father had just cleared and ‘you could see the soil sort of shimmering after the rain.’ I thought, “Well we’re not putting that crop in this year,”.’ In fact, they called this “Sunday Country”, ‘Saturday it’s too wet, Sunday it’s just right, and Monday it’s too hard’, because of its high magnesium levels.

Figure 1. Satellite image of Walma Home and Block properties. Inset map: location of Walma property within Western Australia.

Early weed management

Prior to the 1970s and the introduction of chemicals, Wally’s approach to weeds was limited to grazing, or occasionally burning the weed seed.

When chemicals started to come onto the market in the 1970s, Rob recalls that the only available products were ester and a few herbicides. Glyphosate came in after that, and then availability and use of chemicals just expanded around them. Rob says, ‘I suppose that was just a done thing. You’re surrounded by it and that’s what you do’.

Succession and early practice change

Soon after marrying, Rob and Judi took over the management in 1983. Judi had grown up in Perth and trained and worked as a nurse. Rob’s parents moved off the farm, but during the 1980s his father helped out.

Rob continued with Wally’s farming patterns but began to try out a few different practices. At this time there was no major catalyst, Rob just observed that things could be better. But the increasing issue of salt, Rob reflects, ‘was part of what started me on this journey, because I used to look around here and I used to be grieved by the fact that it’s going salty.’ There was one area of particularly high sodium soils which had inconsistent yields and 50% holes through the crop.

In this period Rob was exposed to a wider variety of practices. He began trying a few new practices: running across the ground with harrows to germinate ryegrass, using rockdust to improve the nutritional profile of the soils and plants, and trialling lupins on the sandy soils to improve nitrogen levels. The rockdust resulted in more earthworms but it didn’t have the desired effect. Looking back he says the missing equation was calcium.

Practice highlight: Early soil monitoring 

In this period, Rob began using simple soil tests. With his science way of thinking, it seemed like the logical thing to do. His motto was ‘why guess when you can measure’. 

Rob says, ‘I used to diligently go out there every year and take tests with a well known laboratory who did mainstream soil testing in WA and I’d get the results back and they’d probably say put on so many kilos of Agras fertiliser.’ 

Rob reflects that the tests were very basic and unhelpful and he acknowledges he didn’t have the knowledge and appreciation of soil that he does now.

Slowing the water

The way water moved through the landscape was one of the first areas Rob worked on. The driveway would often flood, and there were areas of erosion which Rob believed were contributing to poor productivity. He looked at a range of management options before deciding to put in a type of contour bank called WISALT (Whittington Interceptor Self Affected Land Treatment Society). He took a course in a nearby town with local farmer and developer of the WISALT system, Harry Whittington.

Rob recalls how Whittington ‘worked out that the actual lateral flow of water going down to the lower landscape was causing a lot of his problems.’ Wittington then came up with a design that breaks the ‘landscape up with these huge big banks that stop the water from snowballing down the slope and give it a chance to soak in.’ The contours are ‘designed to spill over as an escape into the water course.’

Catalysts: chemicals, dust storms and a growing family

In addition to observations that things could be better, Rob often says that his soil health journey began because he, ‘got sick of having a sick wife.’ During the 1980s Rob and Judi started a family of four children, and Judi and the kids had ongoing health issues. Judi explains, she had respiratory problems and ‘our three children who were all born in the 80s all had chronic issues of their own…. Rob’s mum said there was none of that around when they were raising kids out here.’

During this time dust storms from cleared land and sheep were increasing. Judi recalls:

Very early on in our marriage, there’d be a dust storm. And the cottage lino was red. And the dust was so bad, you’d shut everything up, but the dust was so bad that when you walked on it, you left a footprint.

Chemical use on the farm and in the wider district and industry was also on the rise. An eye opening moment came when the neighbor across the road rang and asked whether Rob was out spraying. The neighbour then told Judi that she gets numb lips when Rob sprays. From this point on Rob and Judi became interested in human health, nutrition and the relationship to soil health and land management.



Building soil health

1990 - 2000

During this period, Rob expanded his knowledge of the relationship between chemistry and biology in soil health, and both Judi and Rob learnt more about human nutrition. For Rob, learning involved reading numerous books, surrounding himself with people who were also making practice changes, visiting farms and attending workshops.

Rob and Judi’s eldest son Daniel began working full time on the farm before heading to agriculture school.

Visiting the USA

Rob joined other Western Australian and eastern state farmers on a trip to the USA in the late 1990s, organised by biological agronomist Ken Bailey, to visit Neal Kinsey, Dr. Arden Anderson and Jeptha Gates and Amish farms in the Midwest. It was on the Amish farms that Rob learnt about improving soils through biological brews, observing how farmers would use their crop residues to make a biological brew that they sprayed back on the land. The soil responded well, it ‘was almost like you could eat it’, Rob recalls. During this time he was also introduced to Acres USA, a publication and community of farmers at the forefront of the biological farming movement.

These experiences led to Rob trying foliars, green manures and lime applications. He understood chemistry to be his primary limiting factor, and so he needed to have a strong focus on getting the chemistry right, which would then enable the biology to function.

Feeding the biology with foliars

Dr. Arden Anderson, a family physician and agricultural practitioner, came to Fremantle in the early 1990s and Rob attended his first soil school which highlighted the importance of feeding the biology along with the chemistry, since Arden was big on ‘feeding the biology’. It was after this workshop that Rob began to experiment with liquid injection and foliars.

At this stage, liquid fertilisers were uncommon in Australia, so Rob had to make a lot of his own. ‘We got a mixing tank and started making lots of different combinations of foliars and even setting up a mister.’ For example, they tried, ‘sugar and molasses and traces and tech grade MAP (Mono Ammonium Phosphate) and calcium nitrate mixed with dam water.’

Practice highlight: Calcium, ‘king of elements’

A turning point for Rob was when he learnt about the important role of calcium in soil health through the knowledge of Dr. William Albrecht, a soil scientist who examined the relationship between soil fertility and human and animal health. Rob embraced the role of calcium as the ‘king of all elements’, responsible for: proper soil function and structure, drainage, oxygenation, strengthening cell walls of leaves, catalysing the functionality of other minerals, and feeding the biology. Rob began to look at farming challenges in new ways, drawing links between calcium and soil health. For example, through his own soil testing, he learnt that the pH level doesn’t necessarily indicate the level of calcium, as is often assumed. He also understood cutworm, which he had previously treated with insecticide, as a sign of calcium deficiency. And he understood that this also applies to the sour grasses, such as barley grass, silver grass, wild oats and brome grass. 

Rob began applying calcium to the whole farm and then concentrated on specific soils, such as alkaline ‘clay country’. He trialled a three way mix of gypsum, carbonate and hydroxide calcium plus rock phosphate. At the same time he would plough green manures – peas or oats or whatever grew – back into the soils, and he would only do this after he had applied calcium, with the aim being to build the calcium content, which also had the effect of increasing the carbon content because of the larger more prolific roots that were growing.

Learning through trials and errors

It was not all smooth sailing in this period. Rob recalls having a huge crop after ploughing in a green manure, but it was followed by a wheat crop that started to rust and shrivel, and he went from fifteen bags per acre down to five. As Rob sees it, the reason would have been excess nitrogen from the green manure. ‘Excess nitrogen overrides potassium and copper uptake, which would have contributed to the crop shrivelling up. The crop had got rust in it because of the low copper and the excess sodium which would have taken over.’

Applying liquids with new combinations of ingredients through the machinery also proved to be a learning curve. Often the liquid inject would block up and cause delays. Rob recalls finding the cause one day after seeing the liquid tank cap lying on the ground. He figured out it had blown off after the combination of calcium with nitrate, carbohydrate with molasses, and dam water with silt had contributed to a build up of microbes; the resulting pressure had blown the cap off. The pressure build up was also causing the discs to block. Rob reflects, ‘We’ve had painstaking hours, painstaking everything, working with liquids. I mean, it’s no wonder I didn’t have a revolt at seeding time.’

After observing that summertime is when a third of their rain falls and when their weeds come up, they tried C4 plants like millets and forage sorghums as summer crops. There were mixed results, depending on the rainfall and moisture in soil. But as Rob and Judi’s son Daniel recalls, they learnt that – at least in their context – you can’t expect to get two crops in a year in a paddock due to moisture limitations.

Practice highlight: Evolving soil and plant monitoring

Rob continued soil testing but now with a greater understanding of soil health. He reflects that the issues in this period were all arising from the imbalances in the soils’ minerals and biology, and each one motivated him to ‘correct the land’ in better ways.

He began to understand the importance of relating the tests back to field observations e.g. water infiltration, soil evenness. He began testing the crop for nutrients and minerals using the newly developed sap tests. Rob says his monitoring practices enabled him to determine what the crops were requiring and then circle back and re-monitor with the in-field sap tests to confirm the improvement of crop health.

The farming system responds

Over the decade from 1990 – 2000, the farm system responded well. Rob and Judi both agree that throughout the 1990s life on the farm was pretty good. The soils were generally softer, had better aeration, infiltration, depth, and more earthworms; and, there was better root growth. The crops were good and so were the finances, with greater profitability and no debt.


Millennium Drought

2000 - 2010

By 2000, the Hetheringtons had gotten rid of the sheep and gone to 100% cropping. Increasingly, sheep were not fitting into their farming system, and wool prices were dropping because of the stockpile. This turned out to be a good move because drought soon followed.

This decade was hard on the Hetheringtons. Judi says, ‘it seemed last century was great, there was no debt and we had investment and the accountant would ring and say you need to spend some money.’ But with the turn of the century came some of the toughest drought years, huge family upheaval, the collapse of the Australian Wheat Board, the Global Financial Crisis (GFC) and the complexities and increased accountant costs arising from the introduction of the Goods and Services Tax (GST).

During this period, Rob says, his farm wasn’t a ‘shiny example’ and there probably weren’t improvements. What helped the Hetheringtons and others get through was getting the crop in early. Even so, he says, ‘The reality is, when soil is without moisture, when it’s dry soil, the biology doesn’t work, even if you are doing everything right from a chemical/biological standpoint, if you don’t get the rain, you won’t get the results.’

Adjusting to 100% cropping

Removing sheep from the farming system presented new challenges. The Hetheringtons had to adapt to farming without the benefits of animals on the land, such as an ‘inbuilt’ source of nitrogen. Rob found it hard. He recalls, ‘I didn’t understand what I was doing’, and in the first year of 100% cropping, despite doubling the area cropped, his profit was the same as the previous year. This was because he wasn’t putting on enough nitrogen and because the previous crop would just ‘consume it’. That is, when he ploughed in the stubble residue from the previous crop the microbes would tie up the nitrogen whilst their increased community worked on breaking down residues. The lack of moisture also contributed to the slow breakdown of the stubble.

When they first removed the sheep, Rob and Daniel applied industrial nitrogen but adjusted how they used it by adding a carbon source, they also developed their nitrogen strategies, via legumes, companion mix choices, green manures, and improving the biology function.

Changing family and farm dynamic

In 2001 Judi and the other children relocated to Albany to continue schooling for the children. Judi also took over the farm office work, and purchased a bookshop (in 2003) and cafe (in 2005). Moving to Albany ‘dramatically changed the family dynamic’, says Judi, and this is a common reality for many rural families. Daniel stayed and supported Rob full time on the farm, but as the drought progressed, he had to find work off-farm and Rob was by himself.

Tough Years

In 2008 Rob’s father passed away. Judi describes this period as a ‘horrendous time’, impacting family and finances. ‘The better part of that decade was negative years.’ The Hetheringtons lost money with the collapse of the Wheat Board. And in 2009 when it came to putting in a crop, ‘there was no money’. Judi emphasised, ‘I mean there was no money… we’d used up all our investments to keep going during the poor years.’ However, because of the GFC, companies had threatened to cease supply (of seeds, machinery etc.) unless farmers signed legal contracts. This meant the Hetheringtons were forced to borrow money. During 2009, family commitments took Rob and Judi overseas, and Daniel was on the farm alone. As Judi explains, Daniel did all the right things but the rain just didn’t come, and the crop was greatly reduced.

Off the farm, Judi got out of the cafe. While it had been doing well for a new business, the landlord had begun major works on the building and they ended up losing a lot of customers.

These years weighed heavily on Judi, who was juggling many tasks while supporting family. Judi recalls, ‘I literally lay on my face in the dust out here and I said “God, take anything away at all”. Didn’t care what it was. So I kind of spiraled into depression over the intervening years.’

(Many farmers struggle with mental health, and we know that mental health is being severely affected by natural disasters, rising input costs, falling commodity prices and an uncertain economic outlook, as Norco’s 2023 National Farmer Wellbeing Report shows. If you are suffering from feelings of depression or anxiety, you can seek support from Lifeline on 131114 or find a list of services at
During these years many family farms were being sold, and the Hetheringtons were faced with a choice. Judi says if it were up to her they would have sold the farm and bought an organic farm down south, but while these were very tough years, she recognises that Rob had work to do and a vision (‘it’s in his DNA to be here’) and he had a vision to restore soil health. Rob acknowledges that it hasn’t been easy, but ‘every life has challenges but also ups and downs’, and perseverance, tenacity and fate helped him through.


Expanding Crop Diversity

2010 - 2022

Family decision-making and succession

As the drought period came to an end, the Hetheringtons worked together as a family to develop decision-making strategies. Judi says that the family ‘drew a line in the sand’ and decided: 

We will not borrow above that amount, we will not have any more than that amount of machinery on the home property. We didn’t get any other land. We’ve made those kinds of decisions to manage our circumstances along the way.

It was during this period that Daniel and Kate got married and decided to live on the land and start a family. And after doing a succession planning workshop, Judi, Rob, Kate and Daniel began to have regular business meetings to work through big decisions. Judi also stepped back from doing the farm books. She had become very involved in the bookshop, and felt it was time for Daniel to learn the ropes and for Rob and Daniel to make all of the farm decisions. 

With Daniel on the farm full time, Rob and Judi were able to step away. In 2015 they took a trip to Israel to look at agricultural practices in similar climates. The Australia-Israel Chamber of Commerce put together a program based on Rob’s interest, including water management practices. Rob and Judi visited a number of water and irrigation plants, and learnt about a practice of reusing water three times over. The trip to Israel confirmed to Rob that ‘in Australia we have a good handle on, and innovations in, the field of broadacre marginal farming.’

Multispecies and a dairy market

In 2015 Rob and Daniel began experimenting with multispecies cropping. Rob doesn’t recall why they decided to go down this path, ‘it just seemed like the natural thing to do’ as they had been companion planting since the 1990s. The first multispecies was a summer crop in 2015, including millets, cowpea, safflower, sunflowers and lablab. Initially they ploughed in one paddock as a green manure and harvested another (dominant in millet) and graded it to sell the seed to farmers. In 2021 a market became available to sell the multispecies crop as feed to a dairy. The dairy asked for more in 2022, prompting Rob to become ‘more serious’ about multispecies cropping. One of the benefits of the dairy market is that they have a cash crop which they can send, ungraded straight from the header. 

In 2021, they put in a ‘seven way’ winter multispecies crop with a disc seeder, sowing seven kilos of wheat, barley, cereal rye, favas, lupins vetch, and a bit of canola, totalling 80 kilos for 275 hectares. In 2022 they changed the recipe to include peas and increased the hectares.

Around the same time they bought a seed grader, which was long overdue as they had been companion planting for many years. They now use this to grade out companion crops, for example canola and lupins, and fava and canola.

Practice highlight: Routine soil and plant monitoring 

Rob acknowledges he has a ‘bent for the tools’. Soil testing and plant testing is now a common part of his decision-making process.

In this period Rob set up a control site (in one of the areas with high magnesium soils) where for the last 15 or so years he has grown crops and applied only his standard base fertilisers but no calcium. Across the contour bank he has put in the same crop at the same time but applied calcium mixes. For Rob this is a long-term trial to ‘prove a point’ and compare what he is currently doing with calcium mixes to the past.

Rob has also incorporated plant testing into his regular practice, using the refractometer and nitrate meter. The refractometer measures brix levels (total dissolved solids) which gives an indication of complex plant sugars, minerals, fats and oils. He also tastes the sap for sweetness. The nitrate meter tells him where his nitrogen is at and whether the crop is lacking.


Now and Into the Future

2023 - ongoing

Family decisions and succession

The family is now at another crossroads. Judi says that the next step for her and Rob is semi-retirement. Judi would need to finish up with the bookshop and Rob would need to transition off the farm. Although, she says, ‘I think Rob’s always going to be connected to here.’

Daniel is grappling with where to go next with the farming system. He feels like the right thing to do is to farm for soil health and to continue many of the practices. But he also wonders whether they can keep it up and whether a ‘more conventional route’ may be more straightforward. Daniel offers a few thoughts for other farmers considering changing practices: 

It’s like anything. You have to believe in what you’re doing, because a lot of what we have done has certainly been hard at work or certainly complicates things. You have to know the reason as to why you’re doing it and believe in the reason. 

For the moment, Rob and Daniel continue to feed the biology and build the function of their system, using a combination of calcium mixes, green manures, and biological stimulants based on feedback from soil and crop tests and observations. They continue to tweak the combinations and experiment with the best machinery and processes along the way.

Refining use of biostimulants

Rob likes to keep their biostimulant recipes and application ‘simple’ now, using fish and fulvic acid, and kelp as a standard liquid whenever they spray a paddock. For seed dressings they use vermiliquid and fish and apply via a portable spray tank. He has a company that makes a liquid for seeding time, including trace elements like sulfates, as well as carbons, kelp, and fish, to which they add more kelp. 

Rob now recognises that much of the effectiveness of foliars is about timeliness. 

I’m more aware of actually getting it on at the right time, putting the right thing on. Whereas in the past, we didn’t have that same awareness so we were just doing it because we felt it was the thing to do and the plant needed it. So you put it on but functionality probably might not have worked as good as what it could have.

Considered use of chemicals

The Hetheringtons don’t use more modern or complex chemicals, they only use them on an ‘as needed’ basis rather than as standard practice, and their use is far lower than industry and district standards. For example, unlike most conventional croppers, they don’t ‘croptop’ (apply a herbicide late in the season to prevent weed seeds). They have received encouragement from their dairy customer to continue their approach of minimising chemical use, because, according to the dairy, chemicals affect the milk. They have also worked out ways to use chemicals more efficiently, for example, they mix chemicals with biologicals for an ideal pH solution and better chemical efficacy while supporting the degradation of the chemical residues via biological activation. They also don’t use fungicides and mostly don’t use insecticides.

Continued companion and MS cropping

Rob and Daniel continue to use companion cropping to supply nitrogen from non-synthetic sources, helping the nitrogen cycle. For example, this year one paddock included canola with lupins. They don’t need to add any nitrogen to the multispecies crop, which now makes up 30% of their enterprises, because legumes are included. Daniel admits that companion cropping does complicate their operation, as ‘you can’t just harvest it, and send it down the road.  You’ve got to clean it and separate it’. For example, last year they separated the lupins and canola straight off the header. ‘The canola went onto the truck to town and the lupins went into a bag to then go to the dairy.’

Adjusting the WISALT banks

Now that soils across the property have better water infiltration, they no longer need all the WISALT banks. Daniel is keen to see some of these go as they get in the way when using large machinery. But they are taking it slowly, observing whether banks fill with water, and leaving those that do. And they are only removing every second bank to allow a greater gap between them.

Soil health champion

Over the past 30 years Rob has refined his farming philosophy to be one of farming ‘deeper’ rather than expanding. ‘Farming deeper’ includes doing all he can to take good care of his “underground livestock” – the biology, microbes, organisms. Rob reflects:

When you go out into the paddock and you do something, you’ve got to think “am I harming that livestock or am I putting something on to benefit them, so they can help me?”… That livestock is your underpaid work force that’s working for you all the time in the soil.

For his dedication to soil health, Rob has recently been awarded with the 2022 Wheatbelt NRM Soil Health Champion.


This project is supported by the Australian Government’s Smart Farms Program.
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