What is Agroforestry?
Agroforestry refers to the deliberate integration of trees and shrubs into agricultural systems.
Why is it so important?
More than Monocultures – Agroforests as All-Rounders
Compared to monocultures, which only produce the cultivated product and deplete soils, agroforests offer diverse ecological and economic benefits. They not only yield rich harvests but also promote soil health, biodiversity, and climate protection.
Carbon Storage – a Contribution to the Climate
Coffee plants, fully mature after nine years, store approximately 14 tons of carbon per hectare. However, a coffee agroforest with diverse, mature trees can store up to 128 tons of carbon per hectare.
Curu's new and growing agroforests sequester twice as much carbon as a monoculture in the first ten years and even three times as much over twenty years.
Why does this matter? The production and consumption of coffee generates CO2 emissions. A classic cup of Curu coffee, however, sequesters more CO2 than it emits – making it climate positive.
Biodiversity
Curu's agroforests promote biodiversity from the soil to the treetops. On each farm, we find an average of 57 different plant species across four levels of vegetation. Our agroforests are home to several hundred animal species. Compare that with a sun-grown monoculture, which has only one species – the coffee plant.
Healthy Soils – the Foundation for All Life
A handful of healthy soil contains 10 to 100 million organisms that keep the soil alive: bacteria, fungi, nematodes, and many more. These microorganisms form the foundation for plant growth and thus for all life on Earth.
In agroforests, this microbial diversity remains intact. Leaf litter from various trees enriches the soil, while the roots of different plant species stabilize the soil structure and promote nutrient cycling. Conventional monocultures, on the other hand, destroy this soil life through the heavy use of fertilizers and pesticides.
Protection Against Climate Change Impacts
Coffee plants thrive at temperatures between 12 and 27 degrees Celsius and cannot tolerate drought periods well. With advancing climate change, temperatures are rising and dry periods are becoming more frequent – a threat to coffee cultivation worldwide.
In agroforests, trees provide natural shade that lowers temperatures and retains moisture. This protects the coffee plants from heat stress and drought. Research shows that temperatures in shaded agroforests can be up to 5°C lower than in open monocultures.
Empowering Smallholder Farmers
In coffee monocultures, farmers' income depends exclusively on the coffee harvest. When coffee prices fall or a harvest fails, they have no safety net. In agroforests, farmers grow a variety of products alongside coffee – fruits, nuts, timber, and medicinal plants. This diversifies their income and reduces their dependence on the coffee market.
Coffee agroforestry systems come in all shapes and sizes.
Generally speaking: the shadier and more species-rich an agroforest is, the higher its biodiversity – and the lower its coffee yields.
In rustic coffee plantations, coffee grows in a largely natural forest – this is the most biodiverse but also the least productive cultivation method. Farmers usually completely or largely forgo fertilizers and pesticides but produce only small quantities of coffee.
In a traditional polyculture or so-called "coffee garden," trees and shrubs are planted for timber, fruit, medicinal plants, and of course coffee. In the less shady areas, vegetables and beans grow. This is a very labor-intensive cultivation method, which is why it doesn't scale. When larger trees are still standing, these gardens have a multi-layered canopy and therefore high biodiversity.
In commercial polycultures, the focus is on returns. Typically, one or two additional species are grown alongside the coffee plant. Avocado, banana, and coffee is a classic combination for this type. Since the shade trees can be chosen specifically, yields can be optimized. Only where commercial polycultures include diverse, multi-layered tree canopies do they achieve similar biodiversity to more traditional systems.
In shaded coffee monocultures, the focus remains on coffee production. However, shade trees are planted at regular intervals to protect the coffee plants from excessive sun and heat. Biodiversity is limited here, as only one or two shade tree species are usually present.
Unshaded monocultures completely forgo trees – the coffee plants grow in direct sunlight. This method maximizes short-term yields but leads to soil degradation, loss of biodiversity, and high susceptibility to climate change impacts.
Coffee agroforests cannot always be neatly categorized into one of the above categories. In reality, there is a wide range between "fully shaded" and "unshaded," and many farms combine elements from different systems.
If agroforestry is so beneficial – why doesn't everyone use it?
While the potential benefits of this farming method are quite easy to name – healthier soils, higher biodiversity, climate resilience, and diversified income for farmers – the transition from monoculture to agroforestry involves real challenges and risks that often discourage farmers from taking the step.
Most farmers focus on using their land as efficiently as possible to maximize their income. The transition to agroforestry means that in the first years, yields may decrease while the newly planted trees are still growing. Until the trees are large enough to provide shade, produce fruit, or store carbon, farmers bear an economic risk. Without financial security or support during this transition phase, many cannot afford this uncertainty.
Agroforestry requires particularly high investments at the beginning, e.g., for planting trees, purchasing seedlings, and adjusting farming methods. Many smallholder farmers in the Global South lack access to the capital or credit needed to finance these investments. Without external support, the transition is often financially impossible.
The interplay of trees, shrubs, and field crops requires new knowledge and additional skills. Farmers must learn which tree species work well with coffee, how to manage shade, and how to optimally time planting and harvesting. This knowledge is often not readily available, and access to training programs is limited.
Products from agroforestry are harder to market – the markets are less developed and demand is uncertain. While coffee from agroforestry is often of higher quality, there is no guarantee that farmers will receive a higher price for it.
