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Building Plants Resilience to Heat Stress

“June 2025 saw an exceptional heatwave impact large parts of western Europe, with much of the region experiencing very strong heat stress. This heatwave was made more intense by record sea surface temperatures in the western Mediterranean. In a warming world, heatwaves are likely to become more frequent, more intense and impact more people across Europe.” These are the words of Strategic Lead for Climate at ECMWF, Samantha Burgess. It’s getting harder and harder for farmers to plan for different cropping seasons and careful timing no longer works with the sudden heat waves. Heat waves have become more common and lasts for longer which is not at all great for the naturally warm regions.

For the sake of those who might not be familiar with the signs, here is the face of heat stressed vegetation. Have you ever spotted your pumpkin leaves bowing down to you as you strolled your garden in the afternoon? Well, this is a cause for alarm. Some plants wilt as they shift their leaves downward to shield themselves from the sun. Or did your apple tree skip a fruiting season? Crops that bloom and bear fruit may lose blossoms or not set fruit. And you know it’s really bad when you notice your crops scarring and losing leaves. The red zone is if you realise your plants start wilting during sunrise. This is a sign that the end is nigh, they are approaching the Permanent Wilting Point. At this point, plants can only take up 35% of the water that the soil is able to hold. Plant death is the outcome of persistent, permanent wilting. There are ways to prevent this, and not all of them call for your farm to get a brand-new irrigation system. Many need careful preparation and minor modifications. Let’s go through some ways of managing plant heat stress on farm.

1. A sudden heat dome can hurt even crops that can handle heat. A shade canopy is a wonderful mechanical strategy for summer crops, no matter how delicate they are. Look for a freestanding canopy that lets some sunshine through. If you can move it, you can use it as a modular solution to the heat. Or put a big piece of shade cloth over your hoop house. Alternatively, you can recycle old tarps and hessian into a makeshift shade umbrella instead of buying an expensive one. With the correct shading, you can keep your plants productive even during the warmest times of the year, provided that light penetrates at least 30% of the time but not more than 60%.

2. If you’ve been hand watering on the farm, it might be time to switch things up. One method that is both inexpensive and simple to implement in order to enhance how you water your crops is to fill little trenches that run along rows of crops with water. To prevent soil erosion, the grading shouldn't be more than 0.5%. Gentle slopes for the trenches do the job just fine. In general, deeper furrows are better for sandy soils than shallower ones, and the opposite is true for clay soils.

3. Mulch. In addition to protecting the soil surface, this helps regulate the temperature below. There will be less soil erosion and more preservation of valuable topsoil due to decreased evaporation at higher soil levels. When applied as a mulch, organic materials gradually decompose, adding nutrients to the soil. When your crops are ready to be transplanted, cover them with a layer of mulch that is one to three inches thick, but do not cover the roots. Avoid compacting the soil and blocking water penetration by not adding too much. A thinner coating works better in places where soil compaction is a problem.

4. I know you are thinking, how about I just shift to farming heat tolerant plant varieties. You could. With thorough planning, planting drought resistant crops is the most effective way to keep your farm running even when the weather outside is scorching hot. So if you are looking to get ahead of the game, find and grow heat-tolerant types and plants. Check out the forecasted weather patterns for summer and decide which one works best for your environment. Start your seeds at the correct time and combine the heat lovers with any of the tactics listed above, and you'll be producing even when it appears that nothing should be happening out there. It is becoming increasingly important to familiarise oneself with heat and drought-tolerant plants. Take a look at your seed catalogue this autumn to get a jump start.

5. If we have a tall plant with shallow roots, using a low-growing plant as living mulch can help keep both plants and the soil cool. This technique is called companion planting. The prairie is a great example of how growing a lot of plants close together can protect them from heat stress. As more delicate plants grow closer to the surface, taller plants shield and support them by creating a canopy of shade. We might not want to plant as densely on the farm as we do in the wild because there are more pests and diseases there. But we do want to plant more than the seed packets say to cover the ground and keep it safe from solar damage.

It is imperative for us farmers to adapt to climate change and apply heat protection strategies to our crop management. With the help of a few practical methods and equipment, farms may continue to generate their normal income, no matter how bad the weather gets. If the weather continues to heat up, these techniques can protect other crops from heat stress as well. In preparation for a heat dome, keep these tactics handy.

Tech For Survival

As climate extremes hammer global supply chains, a new wave of headlines is turning up the pressure on Europe’s farmers and food producers: supply chain fragility, farmer bankruptcies, rising consumer prices, and supermarket shelves under stress. Farming using traditional methods is proving to be a risky business. I am sure anyone living in the United Kingdom, Ireland, France, the Netherlands, or Italy has come across the myriads of painful stories. Traditional agriculture is chocked by the weeds of climate change, pests, trade wars, and volatile input costs. In Italy and Spain, severe droughts have scorched wheat and olive harvests. This has slashed yields, resulting in hiking of food prices. The heavy downpours in the United Kingdom and Ireland have ruined planting windows and soaked fields for months. Elsewhere, Dutch and French farmers see mounting regulations, labor shortages, and competition that pushes smallholders to the brink. From farm to fork, we see the ripple effects on every aspect of the value chains.

It is no surprise when we see the decline in the number of smallholder farmers in Europe. The younger generation is also fleeing the agricultural sector for better-paying employment in the tech industry, urban living, and other fields that offer less dirt and more money. These issues are both systemic, and cultural. With fewer people around to work the land and an aging population, the question of how to produce more food with less resources becomes increasingly pressing for those who choose to remain in rural Europe. This is where embracing technology in farming comes in. So how does AgTech fit into the compounded issues in the sector?

• Farming with Data-Driven Resilience: Farmers can use smart irrigation, precise spraying, and satellite monitoring to cut down on waste, boost yields, and stay strong in bad weather.

• AI Makes Things More Efficient: Robots don't "steal jobs." Instead, they help out when there aren't enough people to complete the work, save money, and give you more time to focus on other important duties.

• European pioneers are working on climate-ready crop features and farming systems that can handle bad weather without losing production. Some of these are regenerative methods and seeds that can survive dry weather.

• Supply chains that are shorter and more efficient. Consumers can understand more about where their food comes from, and producers can get more value from digital platforms that let them see where their food came from.

Indeed, there has been apprehension among European farmers about tech for good reasons; cost, complexity, data privacy, big corporate lock-ins. However, inaction is not an option as it is becoming risky to play safe. Farmers need to embrace experimentation. We can no longer continue to assume we have resilience. We need to design our farming systems to be resilient. This means that as startups, policymakers, co-operatives, and farmers, we have to take ownership and share knowledge, break down barriers, and make the new technology tools pay off on the ground. We can't use old methods anymore in our European farms, orchards, barns, and food processing plants. . Here is what you can do as a farmer. Talk to your local experts, try out new ideas on tiny plots, and get your suppliers to support you with training and fair contracts. Innovation in farming is being supported by European CAP reforms, carbon markets, and digitization grants, which is great news for startups. As startups, we can do better by keeping our innovations real, not showy. We need to get crystal clear on the return on investment when pitching to investors. We cannot turn a blind eye on the resilience gap, it is real! This is why I am calling upon our policy makers to reward early adopters, reduce the risk associated with the transition to new technology, and encourage the resilience of local food systems, not simply exports. We need AgTech that has a purpose and is based on what farmers really deal with, not simply flashy pitches. This year, not five years from now, is the turning point.

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EU seeks cutbacks to farm subsidies: A draft European Commission proposal seen by Reuters proposed eliminating payments beyond €20,000 and combining the EU's two-pillar system. The document is part of the Commission's next EU budget proposal, due Wednesday. The EU's massive Common Agricultural Policy (CAP) of farming subsidies is worth €387 billion, or a third of its 2021-2027 budget. The draft claimed the Commission plan would cap area-based income assistance at 100,000 euros per year to redistribute subsidies to smaller farmers. For those receiving the most, it would gradually lower per-hectare payments. The draft lowered area-based income support subsidies above €20,000 by 25%, €50,000 by 50%, and 75,000 by 75% for farmers. Brussels has tried to curb subsidies for large landowners and agro-industrial enterprises before. The former CAP paid 80% to 20% of beneficiaries. For more insights, visit Reuters.

Use AI to detect employee burn out: You are as good as your team. I don’t know about you but the better half of this year has flown by and so much has happened. Stuff keeps happening around to and inside us and so much calls for our attention. Speaking of attention, have you been keen on your employees/ farm hands? Not to worry in case this slipped through the cracks, AI has got you covered. Did you know that, when deployed correctly, AI can alert executives to employee concern before it becomes a problem. The aim? Creating a workplace with talent, stress management, and human culture. Forbes has more on this.

Bred to Perfection: Kiwis are a popular choice among health-conscious consumers due to their abundance of vitamins, minerals, and antioxidants. The versatility of kiwifruit is probably why so many Europeans have a growing love for the fruit. It can be used in a wide range of foods, including salads, desserts, smoothies, you name it. Italy (the highest consumer of the fruit) and Greece are key producers of kiwi fruit in Europe, and production is expanding to suit domestic and international demand. Despite this, European countries find themselves importing kiwis from big boys like China, Japan and New Zealand. With a CAGR of 5.94%, the European kiwi market is anticipated to reach $2.10 billion by 2033. I watched an interesting video on how New Zealand cracked the code on kiwi production. Enjoy the video below.

Aliens on China’s Tubes: Imagine getting on the train early in the morning and finding a gang of robots smiling or winking at you! Such was the sight for passengers in Shenzhen, China. Earlier this week, more than thirty self-driving, four-wheeled delivery robots got on and off of operating subway trains. They then delivered products to a number of 7-Eleven locations. This test was conducted during off-peak hours and was merely preliminary. The company that developed the robots that ride subways, Shenzhen Metro, anticipates that they will soon assist in stocking shelves at about 100 7-Eleven locations. For more on this, visit Popular Science.

An Innovation That Started Right: With a terrain 270 times smaller than the United States, the Netherlands is the world's second-largest exporter of food by value, and it has emerged as a global leader in agricultural innovation. Instead of prolonging conventional farming methods, Dutch growers made a bold commitment: “Twice as much food using half as many resources.” Since 2000, this principle has driven their focus on sustainability, productivity, and resource efficiency. The Netherlands’ high-tech greenhouse sector is a powerful example of starting with what is right. The civil engineer has got a lot to say about this.

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