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For thousands of years, farmers have not planted just one crop. They planted many in the same field.
This practice, known as maslin agriculture, once fed entire populations and provided a built-in defense against famine and failure.
Then it disappeared almost everywhere.
But today, as modern agriculture faces new challenges, this ancient method is quietly being revived.
Learn more about maslin farming in this episode of Everything Everywhere Daily.
I don’t think most of you are familiar with the term maslin or what it is in relation to agriculture.
The general definition of maslin is “a mixture composed of different ingredients.” It has a more specific meaning in relation to the theme of the episode. “It is a mixture of different types of grains, including wheat, rye, barley, and oats.”
This may seem very pretty and simple, but it’s true. But its historical significance is profound.
Contrary to what most people imagine, ancient farmers did not have fields devoted to just one type of grain, as we do today. Ancient people mixed grains.
Maslin agriculture was significant to ancient and medieval farmers because it solved several problems simultaneously, especially in a world without modern inputs, insurance, or reliable weather forecasts.
Maslin agriculture involves multiple plant species growing together in a symbiotic relationship where the crops support each other. This is not the case when you have one row of crops and another row of crops.
Ancient farmers had bags of mixed grain seeds. He then throws it onto the field by hand, a technique known as broadcasting. Seeds land randomly, with wheat, rye, barley, and anything else that can grow right next to each other.
Just as a forest contains different types of trees, maslin agriculture also includes a variety of crops. In the forest, there are oak trees next to maples and next to birch or elm trees. Each of these trees has unique characteristics that ensure not only their own survival, but the survival of the entire forest.
A single tree may need less sunlight or water. The roots may grow deep rather than wide. This diversity allows each plant to meet its own needs while coexisting with others.
Maslin agriculture emerged after the Agricultural Revolution in the Fertile Crescent and was first practiced throughout Mesopotamia. As the first farmers switched to planned planting, they discovered natural mixing of crops.
Besides its Mesopotamian origins, Egyptian farmers also used it. Egyptian farmers often used a mixture of emmer and barley to brew beer. The Egyptians stumbled upon one of brewing’s great secrets. The idea is to use a variety of grains to add complexity and depth to the taste and texture of the beer.
Ancient and medieval farmers did not seek to maximize yield under ideal conditions. They were trying to survive in uncertain times. Maslin farming worked because it traded some top efficiency for resilience, adaptability, and reliability.
In their context, that was the smarter strategy.
In modern monoculture agriculture, a single pest or weather event can wipe out an entire crop. Resistance to drought, pests and moisture varies from crop to crop. Even if something affects one crop, such as wheat, it may not have much of an effect on another, such as rye.
Plus, the fact that everything is mixed together also provides an element of protection. Modern systems use single grain type rows. If pests or mold strike, these rows will help it spread quickly throughout the field. The fungus can spread from host to host without any intervention.
However, in maslin agricultural settings, losses are much less severe. Properly mixing and balancing grain mixtures can help build natural immunity to disease, fostering what agronomists call the systemic resilience of ecosystems.
For example, in a maslin field, wheat stalks may be affected by a fungus, but the spores travel and reach non-host plants and the disease does not spread further. Maslin fields may face some losses, but crop diversity helps absorb and limit damage.
Mixed plantings also help fields avoid nutrient fatigue. When combined properly, wheat, oats, and barley all benefit the soil in different ways. For example, oats have deeper roots than common grains, so they access nutrients at different levels of the soil. This can make the root systems of wheat and barley healthier, as they do not have to compete with the oat roots.
A prime example of this principle can be seen in the destruction of monoculture wheat crops in the Dust Bowl. If Plains farmers had planted a greater variety of crops, some of the damage suffered in the early stages might not have been possible.
Oats and barley respond differently to dry climates. More land cover from more diverse crops may have delayed the intense erosion seen during the Dust Bowl.
Maslin farming also solves a problem that plagues every gardener on the planet: weeds. Maslin farming uses plants with different growth patterns. This ground cover provided by several crops can deter weeds and eliminate or reduce the need for herbicides.
A similar system to maslin was also used in the Americas in the form of the three-sister crop before the arrival of Europeans.
The “Three Sisters” system developed by many Native Americans in North America involves growing corn, beans, and pumpkins together on the same land. These crops were planted intentionally because they support each other. The corn provides structure for the beans to climb on, the beans fix nitrogen in the soil, and the pumpkins spread along the ground, suppressing weeds and retaining moisture.
It wasn’t a traditional cereal maslin, but the same principles applied.
Maslin fields were often harvested together so they could be used without strict grain separation. The resulting mixed grains can be milled into flour for bread or used as animal feed. This flexibility is well-suited to subsistence farming, where households need options rather than standardized products.
Maslin breads made from mixed grains often have a broader nutritional profile than breads made from pure wheat flour. Rye adds fiber and micronutrients to create a more complex flavor. In many areas, this is not just practical. It has become a major food culture.
So there were many reasons why maslin farming was practiced in the ancient world. This was a way to reduce the risk of famine and avoid disaster for a family, a village or a country.
So why did it stop? What led to the emergence of monoculture agriculture?
Maslin agriculture did not disappear because it failed. It’s gone, at least on paper, because something more efficient has replaced it.
One cause was the increase in cash crops. Europeans introduced cash crops to Asia and Africa. Rubber, indigo, sugar, and tea became the main crops grown in the colony. This crop has almost always been grown as a single crop. The goal was to maximize returns by maximizing returns.
Therefore, they were sometimes vulnerable to crop failures. For example, the Indigo Crisis, caused by years of drought in the 1870s, triggered one of the worst famines in history. Indigo growers on the Indian side were not allowed to grow food. They had to use their indigo profits to buy food from England. If the indigo plantation failed, there was no money to buy food.
These single-crop technologies eventually spread to grain production.
The biggest change came with the rise of modern industrial agriculture. As agriculture became mechanized in the 18th and 19th centuries, especially in places like England, farmers began to favor monocrop systems that could be planted, harvested, and processed uniformly.
The mixed wheat and rye fields did not work well with the new machinery. This is especially true if the grains ripen at slightly different times.
At the same time, the market was changing. Grain buyers, millers, and bakers increasingly demanded consistency. Standardized flour makes it easier to control your baking results, price your products, and trade at scale. Maslin’s definition created variability, which was problematic in a system built on uniformity.
There was also a debate about productivity. With the development of fertilizers, improved seed varieties, chemicals and scientific agricultural methods, monocultures can generally provide higher yields under ideal conditions. Governments and agricultural institutions encouraged specialization on the grounds that it maximized production and simplified distribution.
Finally, the infrastructure held the system in place. Grain elevators, rail transportation, and global commodity markets are all designed around a single crop. Once the system was established, it strengthened itself. Farmers who did not comply had difficulty selling their crops.
In the 20th century, Norman Borlaug and the Green Revolution established monoculture systems to address the looming threat to the world’s food supply. Although Borlaug’s work was important in disaster prevention, it is important to note that his efforts also solidified monoculture agriculture and moved many farmers away from polyculture systems.
Maslin agriculture is making a comeback in the modern world, though not as quickly as some agricultural scientists would prefer.
Ethiopia is perhaps the most modern example of Maslin style agriculture still practiced on a large scale among small farmers.
Farmers in regions such as Tigray and Amhara typically plant mixed crops, including wheat and barley, in the same field. Locally, these mixtures have specific names that reflect how standardized the practice has become.
This is practical, not experimental. Because Ethiopian agriculture is highly dependent on rainfall and affected by drought and variable soils, the Maslin system operates as a built-in insurance policy. When one crop fails due to weather, pests or disease, other crops often survive.
Studies have shown that these mixed fields can produce more stable yields and, in some cases, outperform single-crop fields with improved resistance to pests, weeds and environmental stresses.
Here is the hard truth. Maslin won’t come back in large numbers unless the economy works.
Modern supply chains demand consistency. Granaries, mills, and large bakeries were built around standardized inputs. Mixed grain harvesting complicates everything from pricing to processing. Even harvesting can be tricky as crops mature at slightly different times.
There is also a knowledge gap. Today’s farmers are trained in highly specialized systems rather than mixed crops, so reintroducing maslin will require new research, adaptation of new equipment and a change in mindset.
That said, there would be significant benefits from a large-scale return to maslin farming. A return to Maslin agriculture would give modern farmers something they often lack in the current system: resilience.
By growing mixed grains, such as wheat and rye, together, farms can better withstand unpredictable weather, poor soils and pest outbreaks, reducing the risk of total crop failure.
You can also reduce your dependence on fertilizers and pesticides by improving soil health and naturally suppressing weeds. Although we cannot maximize yields under ideal conditions, we can make agriculture more economically and environmentally sustainable by producing more stable yields over time, supporting biodiversity and opening niche markets for unique mixed grain products.
Today, Maslin agriculture survives not where farming is easiest, but where it is most difficult. This persists in environments where variability, poor soils or limited inputs make monocultures risky.
This is the key insight. Maslin doesn’t fail because it doesn’t work. Its strengths were not needed for industrial agriculture, so it was abandoned. In places like Ethiopia, where these strengths are still important, they have never gone away.
