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biodiversity

Are Intensive Crops Running Out of Steam? The Quiet Revolution Bringing

May 20, 2025 by Lia Novack Leave a Comment

Soils Back to Life

Picture a tomato field that once burst with colour every summer. Today the plants are stunted, the soils cracks like burnt toast and the farmer has to pile on fertilizer just to break even. Swap tomatoes for wheat, maize or courgettes and the scene repeats itself from Andalusia to East Anglia. It’s tempting to shrug and blame bad luck—or the weather—but the real culprit is years of pushing the land harder than it can bear.

The encouraging part? Many growers are rewriting the script, swapping quick‑fix chemistry for practices that work with nature. Yields are bouncing back, soils are recovering and, in several cases, farmers are spending less than before. Here’s how it’s happening—and why it matters to all of us.

Why high‑input farming is hitting a wall

From the 1960s onwards, industrial agriculture promised endless growth: bigger tractors, more synthetic fertilisers, pesticides for every pest. For a time the approach delivered. But soil is not a factory line, and three problems have crept up on us:

1. “Tired soils” – Repeated ploughing and heavy doses of fertiliser strip out organic matter, leaving ground that can’t hold water or nutrients.

2. Stubborn pests and weeds – Spray the same chemical year after year and nature evolves around it, much like antibiotics losing their punch.

3. Plateauing yields – Studies show roughly a third of the world’s grain belts have stopped improving; some are sliding backwards despite rising costs.

That last point is key: each extra tonne of crop now demands more cash, more diesel and more risk, making farming harder to sustain.

What a different future looks like

Pennsylvania, USA – A four‑decade field trial finds that organic maize matches conventional yields in normal years and beats it by about 30 per cent in droughts, thanks to sponge‑like soils rich in life.

The Sahel, West Africa – Smallholders allow native trees to regrow among their millet. The shade reduces heat stress, fallen leaves feed the soil, and harvests rise roughly 30 per cent without extra fertiliser.

Kenya – Farmers combat maize borers by interplanting a fragrant legume that repels the pest and a border grass that lures it away. Yields nearly double, insecticide bills all but disappear and the legume doubles as animal feed.

The pattern is simple: bring back diversity—of plants, microbes, insects—and the farm ecosystem starts to do the heavy lifting for free.

Will going ‘green’ cut production?

Short answer: no. The first year or two can be a wobble while the soil adjusts, yet research and real‑world experience show yields often rebound and keep climbing. Add in lower spending on fertilisers and sprays, plus potential price premiums for eco‑labelled produce, and many farmers end up better off.

Why it matters beyond the farm gate

• Healthier food – Fewer synthetic residues, more flavour, often better nutrient profiles.

• Climate resilience – Living soils store carbon and soak up heavy rain, buffering both floods and droughts.

• Wildlife comeback – Hedgerows, cover crops and flower strips offer refuge for pollinators and birds that intensive fields drove away.

In short, fixing farming helps tackle climate change, biodiversity loss and food security at the same time.

Nest’s part in the story

At Nest we back growers keen to make the switch but unsure where to start. We offer practical workshops, small grants for cover‑crop seed or compost, and a community where farmers trade tips and troubleshoot together. Change is easier— and quicker—when no one has to go it alone.

What you can do

• Choose wisely – Support markets, box schemes or shops that source from regenerative or organic farms.

• Ask questions – A simple “How is this grown?” nudges retailers to find out—and to rethink their supply lines.

• Share success – When you read about a farmer turning degraded land into a thriving polyculture, pass it on. Stories inspire action.

The takeaway

Soil isn’t a lifeless medium; it’s a bustling world that feeds us when we look after it. The apparent decline of intensive cropping isn’t a prophecy of hunger—it’s a warning light urging a course correction. Farmers on every continent are proving that healthier land can yield plenty, often more reliably than before. The tools are already in our hands; all we need is the will to use them.

Will you lend your voice—and your fork—to the change?

Filed Under: Blog Tagged With: agroecology, biodiversity, climate-resilient crops, crop roots, healthy soils, NEST NGO, organic farming benefits, regenerative agriculture, soil health, sustainable farming

What Is Soil Bulk Density and Why Should You Care?

May 10, 2025 by Lia Novack Leave a Comment

Soil bulk density is, quite simply, the mass of dry soil solids per unit volume, expressed in kg/dm³ (or g/cm³). It reveals how tightly the soil particles—sand, silt and clay—are packed together, including the pore spaces between them. A higher bulk density means the soil is more compacted and less porous; a lower bulk density indicates a looser, more sponge-like structure that can hold water and air more readily.

A Down-to-Earth Analogy

BulkDensity_Example

Imagine two jars of marbles. One jar is loosely filled, with plenty of gaps between the marbles; the other is shaken until the marbles settle as tightly as possible. The first jar mimics soil with low bulk density—lots of pore space—while the second jar represents soil with high bulk density, where the particles are closely packed and water struggles to infiltrate.

How It Matters to Farmers

Consider three practical scenarios that illustrate bulk density’s importance:

  1. Tillage and Compaction
    • Suppose a field of winter wheat has a bulk density of 1.60 kg/dm³ in the top 5 cm. After a 20 mm irrigation, water drains through in under two hours—far too quickly for optimal root uptake.
    • By subsoiling and reducing bulk density to 1.30 kg/dm³, the same field might retain moisture for six hours, helping roots stay hydrated and boosting yield by up to 12 %.
  2. Irrigation Scheduling
    • A sandy, dense soil (1.55 kg/dm³) at 15 cm depth may only hold 10 % of its volume in water, necessitating irrigation every three days.
    • In contrast, a loam with lower bulk density (1.25 kg/dm³) can retain 25 % water, allowing irrigation intervals of five to six days—a potential 30 % annual water saving.
  3. Machinery Traffic
    • Each pass of a 12-tonne tractor can increase bulk density by 0.20 kg/dm³ down to 20 cm depth.
    • By restricting machinery to permanent wheelings and avoiding multiple passes over the same line, farmers can limit soil compaction and preserve structure.

Why Scientists Value Bulk Density

Bulk density underpins models of erosion, hydrology and climate interactions:

  • Erosion Risk: On a 15 ° slope, soils over 1.6 kg/dm³ might generate 40 % more surface runoff and lose up to five tonnes of sediment per hectare in a 30 mm storm than soils at 1.2 kg/dm³.
  • Carbon Sequestration: Denser soils store less organic matter, reducing CO₂ sequestration potential by around 15 % over decades.
  • Water Balance: Incorporating bulk density into groundwater recharge models refines aquifer yield forecasts and helps urban planners gauge subsidence risks where heavy landscaping is common.
Measuring_Bulk_Density
Measuring_Bulk_Density

Introducing the Soil Bulk Density GeoViewer

To bridge the gap between soil science and practical fieldwork, we’ve developed an interactive Bulk Density GeoViewer that brings bulk density maps straight to your fingertips. Rather than wrestling with printed charts or abstract numbers, this tool displays real-time bulk density data overlaid on a familiar street-map backdrop, so you can:

  • Instantly locate yourself in the field via your browser or mobile device’s GPS.
  • Visualise bulk density in the top 0–5 cm of soil using SoilGrids’ high-resolution WMS service.
  • Adjust transparency on the fly with a simple slider, letting you compare subsurface data against roads, boundaries or other map layers.
  • Refer to an intuitive legend that uses a green-to-blue colour ramp—mirroring the soil’s compaction levels—so even non-experts can interpret the map at a glance.
  • See the scale bar for quick distance checks and activate the measurement tool to calculate areas in hectares or distances in metres.

By combining geolocation, real-time WMS imagery and user-friendly controls, the GeoViewer empowers both farmers and researchers to:

  • Pinpoint zones of excessive compaction that may benefit from targeted subsoiling.
  • Monitor how bulk density evolves over time—before and after tillage or heavy machinery traffic.
  • Plan irrigation schedules based on precise, location-specific soil porosity.
  • Share customised views with agronomists or colleagues via a simple link.

Ready to unlock your soil’s hidden potential?

Access our free Soil Bulk Density GeoViewer now—no downloads, no fees, just instant insights. Click below to start exploring your land’s compaction patterns and make smarter, data-driven decisions today!

Bulk Density

Filed Under: Blog Tagged With: biodiversity, ecosystem services, soil bulk density, sustainable agriculture

Understanding Saline Soils: A Practical Guide for Farmers

April 7, 2025 by Lia Novack Leave a Comment

What does it mean for soil to be saline?

Imagine watering your plants, and afterwards, you notice a whitish residue on the soil, as if someone had sprinkled salt over it. This is because there really is salt in the soil. We refer to soils with a high concentration of dissolved salts as saline soils. This can happen for various reasons, such as using saline irrigation water, intrusion of saline water, or simply because the location naturally has high salt content. This is more common in areas with low rainfall and high heat, as the water evaporates but the salts remain.

Why is soil salinity a problem for plants?

The presence of high salt levels in the soil can be problematic because it makes it difficult for plants to absorb water and nutrients properly. This weakens them, interferes with their growth, and in severe cases, can even kill them. Plants in saline soils often appear wilted, have burnt tips on their leaves, and show stunted growth.

Plants that indicate saline soils

Some plants can not only tolerate salinity but also signal that a soil is saline. Here are a few of them:

Salicornia europaea
Salicornia europaea
  • Salicornia: Also known as glasswort or sea asparagus (Salicornia europaea), this succulent green plant is typical of coastal and saline zones.
  • Atriplex: Known as saltbush, these plants can thrive in highly saline soils and are often used to rehabilitate degraded lands.
  • Suaeda: Often called sea blite (Suaeda maritima), this is another plant that adapts well to saline conditions and helps indicate their presence.
  • Juncus: These reeds are commonly found in brackish areas and are good indicators of salinity (Juncus acutus).

Additionally, utilising plants with arbuscular mycorrhizal fungi, a type of fungus that forms symbiotic relationships with plant roots, can be an effective strategy to enhance plant growth in these challenging soils.

Tips for managing saline soils

Atriplex halimus
Atriplex halimus
  1. Early identification: Learning to recognise plants that indicate salinity can help you take action before the problem seriously affects your crops.
  2. Improving drainage: Ensuring that your soil has good drainage can help wash away salts.
  3. Using amendments: Materials like gypsum can help displace salts and improve soil structure.

Conclusion

Recognizing and understanding saline soils is crucial for any farmer or land manager. By observing which types of plants are growing in your fields and how they respond, you can gain valuable insights into the health of your soil and take steps to improve its quality and the productivity of your crops. This guide is not only a starting point for better managing saline soils but also a way to promote more sustainable and effective agricultural practices.

Filed Under: Blog Tagged With: biodiversity, ecosystem services, nature conservation, salinity, sustainable agriculture, types of ecosystem services

Why Organisations Like NEST Matter More Than Ever

April 6, 2025 by Lia Novack Leave a Comment

Let’s be honest — we’re facing some of the biggest environmental challenges in human history. Climate is shifting in ways we can’t ignore. Soils, once rich and alive, are losing their strength. And rural communities? Many are fading, slowly but surely. In the middle of this picture, organisations like NEST (Nature, Environment, Sustainability & Transformation) are not just relevant — they’re essential.

What sets NEST apart isn’t just its mission — it’s how they’re putting it into action. They’re not throwing around buzzwords or sticking to old formulas. They’re actually blending cutting-edge science, clean energy and local wisdom to find solutions that make sense in real life. Think solar panels working side by side with crops, training farmers to regenerate their soil, or building seed libraries to preserve traditional varieties for the future.

But maybe the most powerful thing? NEST listens. They work with the land, not just on it. They partner with communities rather than imposing solutions. And they know that change doesn’t come from one big idea — it grows, bit by bit, through education, shared knowledge and real, honest collaboration.

We need more of that. More of them.

Because climate action isn’t abstract. It’s here, it’s now — and it’s local. And it’s through initiatives like NEST that we can start to rebuild a more resilient, fair and sustainable relationship with our environment.

Filed Under: Blog Tagged With: agrovoltaics, biodiversity, climate change, community resilience, ecosystem services, environmental NGO, green technology, nature conservation, NEST, renewable energy, rural innovation, seed banks, soil regeneration, sustainability education, sustainable agriculture

What Are Ecosystem Services – And Why Are They at the Heart of Our Environmental Future?

April 1, 2025 by Lia Novack

In the midst of a climate crisis, more and more voices are calling for a real, deep, and long-term green transition. But that transformation cannot happen without understanding a key concept: ecosystem services. In other words, all the benefits nature provides us for free that support our daily lives — from the air we breathe to the food on our plates.

What types of ecosystem services exist?

Ecosystem services are grouped into four main categories:

  • Provisioning services: These are the tangible products we obtain from nature, such as fresh water, crops, timber, and medicinal plants.
  • Regulating services: Natural processes that help regulate environmental conditions, including air and water purification, pest control, and climate regulation.
  • Supporting services: These are the foundation for all other services — like soil formation, nutrient cycling, and pollination.
  • Cultural services: The non-material benefits ecosystems offer, such as recreation, ecotourism, cultural heritage, and spiritual value.

Real-life examples that are already making a difference

The concept may sound abstract, but in practice, it has very real implications. In several Spanish cities, for instance, urban green spaces are being expanded with native trees to combat heatwaves. These areas don’t just improve aesthetics — they lower local temperatures, filter pollutants, and manage stormwater runoff more effectively.

In southern agricultural regions, some farms are reintroducing living hedgerows and flower strips to attract pollinators. This boosts crop productivity without relying on chemicals, while also supporting local biodiversity.

Wetlands are another key example — acting as natural water purifiers and helping to prevent floods. Their preservation is not just about wildlife: it directly impacts the water security of thousands of people.

A new way of seeing the land

Understanding and valuing ecosystem services is not just the job of scientists or policymakers. It requires a shift in mindset that includes all of us. It means recognising that healthy ecosystems aren’t a luxury — they are the foundation of our health, economy, and overall quality of life.

This is why more and more initiatives are now embracing land management models that incorporate ecosystem services into planning and design. Restoring forests, protecting agricultural soils, or conserving wetlands is no longer seen as a cost — but as an investment with ecological, economic, and social returns.

Filed Under: Blog Tagged With: biodiversity, climate change, ecosystem protection, ecosystem services, environmental benefits, environmental restoration, natural resources, nature-based solutions, sustainability, sustainable agriculture, types of ecosystem services

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