Sustainable Agriculture, Biodiversity & Organic Farming

Explore how sustainable agriculture and organic farming can protect agricultural biodiversity, restore soil health, strengthen resilience to climate change, and support food security through crop diversity, locally adapted varieties, and farmer-led practices.

POLICY BRIEFS

Mithat Direk

10/16/2026

white and purple flowers on green grass field during daytime

In the decades following World War II, agriculture underwent a dramatic transformation. The Green Revolution introduced high-yielding crop varieties, synthetic fertilizers, chemical pesticides, and extensive irrigation systems. These innovations significantly increased global food production and helped reduce hunger. However, the benefits came with environmental costs that are becoming increasingly evident.

As agricultural scientist Mithat Direk of Selçuk University explains in his review, high-input farming encouraged the cultivation of a limited number of crops and varieties. Thousands of locally adapted varieties, developed by farmers over centuries, gradually disappeared from agricultural landscapes. Meanwhile, biodiversity including soil microorganisms, pollinators, and natural pest predators declined in many farming systems.

The Food and Agriculture Organization’s 2019 report highlighted growing concerns about the narrowing diversity of crops supporting human nutrition and the loss of associated biodiversity essential for healthy agricultural ecosystems. This decline is not simply an environmental issue; it threatens the resilience and reliability of food production.

Agricultural biodiversity includes the variety of plants, animals, and microorganisms that contribute directly or indirectly to food and farming. It has two important components. Planned diversity comprises crops, crop varieties, cover crops, and livestock deliberately selected and managed by farmers. Associated diversity includes soil organisms, pollinators, natural enemies of pests, and wild plants that thrive within and around agricultural landscapes.

Both are essential for sustainable production. Pollinators support crop reproduction, beneficial insects help control pests, and soil organisms contribute to nutrient cycling and soil health. When farming becomes dominated by monocultures and excessive chemical inputs, these natural services can weaken, increasing dependence on costly external inputs.

Researchers Moonen and Bàrberi emphasised the importance of functional biodiversity: diversity that actively supports essential ecological processes. The goal, therefore, is not merely to increase the number of species on farms, but to maintain the organisms and interactions that sustain productive, resilient, and environmentally responsible agricultural systems.

Ecological Agriculture: Working with Nature, Not Against It

Ecological agriculture represents a fundamentally different approach to farming, placing natural biological processes at the centre of agricultural production. Rather than depending primarily on synthetic fertilizers and chemical pesticides, it promotes practices that improve soil health, conserve biodiversity, and strengthen ecosystem functions. This approach includes certified organic farming, agroecological practices, and other low-input production systems.

In Türkiye, Organic Agriculture Law No. 5262 provides the legal framework for organic production, while ecological agriculture represents a broader concept that extends beyond certified organic farming. Its principles involve redesigning entire farming systems rather than simply replacing synthetic chemicals with natural alternatives. These principles include recycling nutrients, increasing soil organic matter, conserving water, diversifying crops, and encouraging beneficial interactions among plants, animals, and microorganisms.

The relationship between biodiversity and ecological agriculture works in both directions. Ecological farming depends on diverse biological communities to support pollination, natural pest control, nutrient cycling, and soil fertility. In turn, practices such as crop rotation, intercropping, cover cropping, and reduced pesticide use create habitats that help beneficial organisms survive and thrive.

This approach can reduce dependence on costly external inputs while improving the resilience of farms against pests, diseases, and climate-related stresses. However, successful implementation requires appropriate knowledge, locally adapted practices, and effective support for farmers. By working with natural processes rather than against them, ecological agriculture can help reconcile agricultural productivity with biodiversity conservation and long-term environmental sustainability.

How Agricultural Biodiversity Strengthens Farming and Builds Resilience

Agricultural biodiversity supports farming through healthier soils, natural pest control, pollination, genetic conservation, and greater resilience to environmental shocks. Its benefits extend beyond individual crops, helping farmers improve resource efficiency and maintain production over the long term.

Soil is one of agriculture’s richest reservoirs of biodiversity. Bacteria, fungi, mycorrhizae, nematodes, and other organisms decompose organic matter, recycle nutrients, improve soil structure, and suppress certain disease-causing pathogens. Organic amendments, legumes, cover crops, and diverse crop rotations can strengthen these biological processes, increase soil organic matter, and support healthier root systems. These improvements are particularly valuable where soil degradation and declining fertility threaten agricultural productivity.

Biodiversity also provides natural protection against pests and diseases. Diverse cropping systems can make host plants harder for pests to locate while providing food and shelter for beneficial insects. Research has found that greater plant diversity can improve the effectiveness of natural enemies and reduce pest pressure. Genetic diversity offers additional protection: in Yunnan Province, China, planting mixtures of rice varieties with different levels of resistance substantially reduced rice blast disease and increased yields without fungicides. This demonstrates how crop diversity can reduce the risks associated with genetic uniformity.

Pollinators are equally important. Many crops contributing to human nutrition benefit from insect pollination, while wild pollinators can improve fruit set independently of honey bees. Conserving flowering plants, nesting habitats, and pesticide-sensitive species therefore supports both agricultural production and wider ecosystem health.

Concerns about the productivity of ecological agriculture require a broader perspective. Although organic yields can be lower on average than conventional yields, the difference varies by crop, climate, and management. Intercropping, crop rotation, and other diversification practices can narrow yield gaps while improving soil health, pest regulation, and water management. Productivity should therefore consider total output, input efficiency, and yield stability—not simply the yield of a single crop in one season.

Moving beyond monoculture is central to this transition. Rotations, mixed cropping, cover crops, and integrated crop-livestock systems diversify production across time and space, helping interrupt pest cycles and reduce excessive dependence on external inputs.

Biodiversity conservation also protects agricultural heritage. Locally adapted varieties may possess valuable tolerance to drought, salinity, poor soils, and regional diseases. Supporting local seed banks, farmer seed exchanges, participatory breeding, and markets for traditional crops can preserve these resources while creating economic opportunities.

Finally, biodiversity strengthens resilience to climate change and extreme weather. Different species respond differently to environmental stress, while overlapping ecological functions help maintain essential processes when some organisms are affected. Research following Hurricane Mitch in Central America found that farms using agroecological practices generally experienced less soil erosion and damage than nearby conventional farms. Together, these benefits show that agricultural biodiversity is not an optional environmental extra; it is a foundation for productive, adaptable, and sustainable farming systems.

What Needs to Change: Enabling Biodiversity-Friendly Agriculture

The complementary relationship between biodiversity and ecological agriculture does not develop automatically. Its success depends on supportive policies, practical knowledge, and market systems that make sustainable farming economically attractive and accessible to farmers.

Policy support must move beyond measuring agricultural success primarily through production volumes. Governments should reward ecosystem services such as soil conservation, pollination, water regulation, and biodiversity protection. Financial assistance during the transition to ecological farming, incentives for crop rotations and cover crops, and support for conserving locally adapted varieties can encourage adoption. Seed regulations should also accommodate suitable local varieties while maintaining appropriate quality and plant-health safeguards.

Farmer knowledge is equally important. Ecological agriculture requires informed decisions about soil fertility, crop combinations, pest management, and local environmental conditions. Farmer field schools, agricultural extension services, participatory research, and farmer-to-farmer learning can help producers develop these skills. Universities and research institutions should work closely with farming communities to develop practical, locally appropriate solutions.

Market development must make diversified production financially viable. Better processing, storage, and marketing facilities are needed for rotational legumes, traditional grains, and other locally adapted crops. Cooperatives, farmers’ markets, short supply chains, and participatory guarantee systems can improve market access and reduce costs for smallholders. Geographical indications and product differentiation may further increase the value of distinctive local varieties.

Coordinated action across these areas can reduce adoption barriers, strengthen rural livelihoods, and make biodiversity conservation a practical component of productive, resilient, and sustainable agriculture.

Türkiye’s Agricultural Heritage and a Sustainable Future

Türkiye occupies a strategically important position between the Near Eastern and Mediterranean centres of crop origin, near the northern edge of the Fertile Crescent. This geographical and ecological diversity has made the country an important repository of agricultural biodiversity, including local varieties and wild relatives of wheat, barley, lentils, chickpeas, and peas. Evidence linking the domestication of einkorn wheat to southeastern Anatolia highlights Türkiye’s contribution to the development of agriculture worldwide.

However, agricultural modernization and the widespread adoption of uniform, high-yielding varieties have displaced many traditional crops. The Türkiye Seed Gene Bank provides essential facilities for preserving genetic resources, but conservation cannot depend on storage alone. On-farm conservation allows farmers to continue cultivating local varieties under changing environmental conditions, enabling these resources to evolve through natural selection and farmer-led seed management.

These priorities are particularly relevant in dry regions such as Konya and Central Anatolia, where water scarcity and climate change threaten agricultural sustainability. Wider cultivation of drought-adapted local varieties, legume-based rotations, and practices that increase soil organic matter could improve water-use efficiency, support soil health, and strengthen farm resilience. Such approaches would help conserve valuable genetic resources while maintaining agricultural productivity under increasingly uncertain conditions.

A Future Worth Cultivating

Conserving agricultural biodiversity and expanding ecological agriculture are closely connected goals. Ecological farming relies on biological processes to maintain soil fertility, regulate pests, and support pollination, while its diversified practices can protect the biodiversity on which these functions depend.

Realizing this potential requires coordinated policies that reward crop diversification, rotations, cover crops, and ecosystem services. Seed regulations should facilitate the conservation and appropriate use of local varieties, while extension services, farmer training, and market access for diversified products need strengthening. Long-term research should assess the environmental and economic performance of ecological practices across different regions.

Ultimately, Türkiye can draw on its rich agricultural heritage to help build resilient food systems. Farming in partnership with nature offers a practical pathway towards biodiversity conservation, climate adaptation, and sustainable production. The genetic diversity nurtured by generations of farmers remains an invaluable resource for meeting tomorrow’s food challenges.

Conclusion

Agricultural biodiversity is fundamental to building productive, resilient, and sustainable food systems. Although modern farming technologies have increased food production, excessive dependence on monocultures and synthetic inputs has contributed to biodiversity loss, soil degradation, and greater vulnerability to environmental shocks. Ecological agriculture offers a promising alternative by harnessing natural processes through crop diversification, rotations, soil conservation, and biological pest management. Protecting locally adapted varieties is equally important for preserving agricultural heritage and developing crops capable of withstanding drought, salinity, and climate change. Türkiye’s rich genetic resources provide valuable opportunities to connect traditional knowledge with modern agricultural research. However, lasting progress requires supportive policies, effective extension services, farmer participation, and stronger markets for diversified agricultural products. Governments, researchers, and farming communities must work together to reward ecosystem services and make biodiversity-friendly practices economically viable. Ultimately, farming with nature is not merely an environmental choice; it is a strategic investment in food security, rural livelihoods, and the long-term sustainability of agriculture.

Please note that the views expressed in this article are of the author and do not necessarily reflect the views or policies of any organization.

The writer is affiliated with the Department of Agricultural Economics, Selcuk University, Konya-Türkiye and can be reached at mdirek@selcuk.edu.tr

Sustainable Agriculture, Biodiversity & Organic Farming

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