Search Results (37)

We propose a data-efficient framework for automating sowing operations by agricultural robots in densely mixed polyculture environments. This study addresses the challenge of enabling robots to identify suitable sowing positions with minimal labeled data by integrating image-based field sensing with expert agricultural knowledge. We collected 84 RGB-depth images from seven field sites, labeled by synecological farming practitioners of varying proficiency levels, and trained a regression model to estimate optimal sowing positions and seeding quantities. The model’s predictions were comparable to those of intermediate-to-advanced practitioners across diverse field conditions. To implement this estimation in practice, we mounted a Kinect v2 sensor on a robot arm and integrated its 3D spatial data with axis-specific movement control. We then applied a trajectory optimization algorithm based on the traveling salesman problem to generate efficient sowing paths. Simulated trials incorporating both computation and robotic control times showed that our method reduced sowing operation time by 51% compared to random planning. These findings highlight the potential of interpretable, low-data machine learning models for rapid adaptation to complex agroecological systems and demonstrate a practical approach to combining structured human expertise with sensor-based automation in biodiverse farming environments. Full article

Understanding the impact of changes in cropland on food production is crucial for economic development and social stability. In recent years, rapid economic growth and frequent population migration in Guangdong Province have significantly changed cropland use and patterns, posing challenges to cropland protection and food security. This study utilized Landsat-4/5/7/8 time-series imagery from the Google Earth Engine and combined it with deep learning techniques to identify long-term cropland use from 1991 to 2020. Then the Global Agro-Ecological Zones model was applied to assess the impact of various cropland use changes on grain production potential (GPP). On this basis, the intrinsic relationship between population, economic development, and food production was further explored using the center of gravity model and spatial mismatch model. The study finds that Guangdong Province’s cropland area has decreased by approximately 34.16%. The annual average loss due to non-agricultural use and abandonment is 2.75 thousand km² and 3.09 thousand km², respectively, while the average yearly compensated cropland area is 2.94 thousand km². The actual annual food loss could meet the needs of about 4.6 million people. Furthermore, non-agriculturalization is the main way of losing GPP, and the reduction of GPP caused by abandonment cannot be underestimated. When considering the GPP loss due to abandonment, new GPP has not fully compensated for lost GPP. Guangdong Province has rapidly decreased the coordination between food production, population, and economic development, leading to considerable contradictions in the social–ecological systems. Finally, the movement of cropland and population centers in opposite directions has intensified the decoupling phenomenon. The results can guide the development of refined cropland protection policies and promote sustainable development of social–ecological systems. Full article

The “agroecological transition” has emerged as a framework that aims to explain the complex changes taking place in agrifood systems. This study offers a mapping of the emergence of this framework, and aims to demonstrate that the agroecological transition can refer to different perspectives beyond the simple combination of two concepts. We carried out a bibliometric analysis of 298 articles (2012–2023), searched using the command “agroecologic* transition*”. We used VOSviewer software (version 1.6.20), which is able to reveal clusters of co-citations of the most cited authors and articles. This result, in turn, indicates the existence of different perspectives on the use of agroecological transitions. Four clusters were found: (i) “Techniques and Practices”, represented by articles that document the agroecological transition as an expression of specific agricultural techniques and practices; (ii) “Transition Theory”, which employs the emerging theory and its conceptual contributions; (iii) “Transition Criteria”, which involves the use of criteria to monitor the transition; and (iv) “Political and Social”, made up of articles that explore the political and social movement dimension of agroecology. Each of these clusters, and their approaches, contribute different interpretations of agroecology itself, indicating the emergence of a new framework capable of attributing new meanings to it. Full article

This paper reviews, compares, and critically evaluates two broad groups of sustainable agriculture models: “sustainable agriculture” and “sustainable agrifood systems”. The “sustainable agriculture” models—comprising organic farming, regenerative agriculture, climate-smart agriculture, carbon-capture agriculture, and nature-based solutions—focus primarily on improving ecological sustainability through farm-level practices. These models emphasize reducing external, industrial inputs, enhancing biodiversity, and promoting climate resilience, relying on technological and market-based solutions to address environmental concerns. On the other hand, the “sustainable agrifood systems” models—agroecology, alternative food networks, and permaculture—offer more ambitious visions of systemic transformation. These approaches not only seek to implement environmentally sound practices but also aim to reconfigure the broader food system by challenging corporate power, promoting local governance, fostering food sovereignty, and prioritizing social justice. Grounded in grassroots movements, these models emphasize social justice and economic viability in addition to ecological sustainability. This paper’s contribution lies in its comparative analysis of the wide array of sustainable alternatives, highlighting both their strengths and limitations. Adopting an agrarian political economy perspective, it critiques the former camp for limited engagement with structural issues inherent in capitalist agriculture and the latter camp for underplaying the importance of industrial agriculture for national development in the Global South. Full article

Local agri-food disruptive innovations are becoming increasingly crucial for the transformation of agri-food regimes towards sustainability. This study incorporates a systemic approach to explore the relevance of various capacities available at the city region level to prepare, initiate, and lead a change in the sustainability trajectory of local agri-food systems. It explores the city of Valdivia, Chile, which has a large movement of sustainable cooperatives and diverse disruptive private and public agri-food initiatives that are challenging the deep free-market economic and social model with an agro-exporting, competitive, and centralist focus. Through the systemic approach of sustainability transition studies, themes of emergence and development of local agri-food transition processes are being developed, and the findings are linked to studies of social movements and the social and solidarity economy. Full article

Agroecology integrates science, social movements, and agricultural practices, playing a central role in the sustainability of food systems. It addresses agroecosystems and food systems holistically; however, defining whether a farm is agroecological remains a challenge. This article proposes a methodology to measure farms’ agroecological performance, adapted to the family farming context in Portugal. The aim of the developed methodology is to compare the agroecological performance of family farms (conventional and non-conventional), providing information about anchors for agroecological transition and supporting public policies. A literature review identified existing farm evaluation methodologies, with Tool for Agroecological Performance Evaluation (TAPE) and Agroecology Criteria Tool (ACT) scoring highest in an assessment process. Questions from both were integrated into a questionnaire for family farmers. This field work provided critical insights towards the methodologies: (1) territorial adaptability; (2) transition constraints’ origin; and (3) use of non-academic language. The results were incorporated into the developed methodology, which combines the TAPE indicator matrix and Gliessman’s five levels of food system change, the latter of which provides the framework for the ACT. This study made it possible to identify the most relevant aspects for characterizing family farmers/farms and the importance of how the evaluation criteria/indicators are ordered by element/theme, as it alters the values of each farm’s agroecological performance. Full article

Nitrogen (N) is the most limiting nutrient for the production of vegetable crops, but anthropogenic sources pose risks due to its transformation into several reactive forms and movement throughout the environment. The bulk of the N research to date to improve Nitrogen Use Efficiency (NUE) has followed a reductionist factorial approach focused on synthetic N application rates and crop growth response, under monocultures. The increased adoption of diversified cropping systems, organic N sources, and alternative management practices makes it more challenging to unravel N form transformation, movement, and crop uptake dynamics, in time and space. Here, based on a selected review of the recent literature, we propose a holistic approach of nutrient management to highlight key management and production variables as well as multilevel cropping system, genetic, environmental, ecological, and socioeconomic interactions to improve the N cycle and NUE. The best management strategies to improve NUE include both organic and inorganic N rate calibration studies, germplasm selection, crop rotations, identification of nutrient x nutrient interactions, and pest and water management. Agroecological practices that may improve NUE include vegetational diversification in time and space, integrated crop–livestock systems, conservation tillage, organic amendment inputs, legume-based cropping systems, as well as a landscape approach to nutrient management. Full article

This paper describes the development of a transdisciplinary knowledge network dedicated to supporting agroecology knowledge exchange and capacity building that is particularly focused on the sustainable use and conservation of agrobiodiversity. The network—Fostering Effective Agroecology for Sustainable Transformation, or FEAST—includes nodes in Brazil, Cuba, Mexico, and Canada’s Northwest Territories and has been engaged in Participatory Action Research activities since 2015. This paper examines the development of the network over time, including a workshop held in 2019 in and around Curitiba, Brazil, and reflects on the outcomes of knowledge exchange activities. We discuss how the development of the FEAST network has informed participants’ local practice and their sense of belonging to a larger-scale, international movement for agroecology, agrobiodiversity conservation, and food system sustainability. Full article

Soil water and salt movement during the freeze–thaw period facilitate soil and water conservation and agroecological environment maintenance in the desert–oases transition zone of the Hexi Corridor; however, our understanding of soil salinization and the shifting water, heat, and salt states in soil ecosystems of Haloxylon ammodendron forests at different ages is poor. We analyzed the soil moisture, temperature, and salinity characteristics of Haloxylon ammodendron forests of different ages in the Hexi Corridor of Northwest China and determined their coupling. Our results indicated that shallow (0–120 cm) soil temperatures significantly correlated with air temperatures. With increased forest age, the soil freezing period shortened and the permafrost layer shallowed. Changes in soil temperature lagged those in air temperature, and this lag time increased with forest age and soil depth. With increases in forest age and planting years, the water in the shallow soil layer gradually declined, and the surface aggregation of salt increased. In deep soils (120–200 cm), both soil moisture and salinity increased with the number of planting years. Accordingly, the clay layer and deep root system of Haloxylonammodendron greatly influenced the transport of soil water and salt; and temperature is a key driving force for their transport. Thus, water, temperature, and salt content dynamics were synergetic. Full article

It has been claimed that Zero Budget Natural Farming (ZBNF), a burgeoning practice of farming in India based on low-inputs and influenced by agro-ecological principles, has the potential to improve farm viability and food security. However, there is concern that the success of the social movement fueling the adoption of ZBNF has become out of step with the science underpinning its performance relative to other farming systems. Based on twenty field plot experiments established across six districts in Andhra Pradesh (SE India), managed by locally based farmer researchers, we present the first ‘on the ground’ assessment of ZBNF performance. We show that there is no short-term yield penalty when adopting ZBNF in small scale farming systems compared to conventional and organic alternatives. In terms of treatment response, we observed differences between agro-climatic zones, but in this initial evaluation we cannot recommend specific options tuned to these different contexts. Full article

By the mid-century, urban areas are expected to house two-thirds of the world’s population of approximately 10 billion people. The key challenge will be to provide food for all with fewer farmers in rural areas and limited options for expanding cultivated fields in urban areas, with sustainable soil management being a fundamental criterion for achieving sustainability goals. Understanding how nature works in a fast changing world and fostering nature-based agriculture (such as low-input farming) are crucial for sustaining food systems in the face of worsening urban heat island (UHI) effects and other climatic variables. The best fit for the context is transformative agroecology, which connects ecological networks, sustainable farming approaches, and social movements through change-oriented research and action. Even though agroecology has been practiced for over a century, its potential to address the socioeconomic impact of the food system remained largely unexplored until recently. Agroecological approaches, which involve effective interactions between researchers, policy makers, farmers, and consumers, can improve social cohesion and socioeconomic synergies while reducing the use of various agricultural inputs. This review presents a timeline of agroecology transformation from the past to the present and discusses the possibilities, prospects, and challenges of agroecological urbanism toward a resilient urban future. Full article

Agroecology is gaining ground as a movement, science, and set of practices designed to advance a food systems transformation which subverts the patterns of farmer exploitation currently entrenched in dominant agricultural models. In order for agroecology to achieve its espoused twin aims of social and ecological wellbeing, women and other historically marginalized stakeholders must be empowered and centered as the movement’s protagonists. The importance of gender and social considerations is not limited to patently social aspects of the agroecological agenda, but bears relevance in every dimension of agroecology. Yet, issues related to gender have commanded relatively little attention in the agroeocological literature. In this paper, we review HLPE’s 13 defining principles of agroecology through a feminist lens to demonstrate the ways in which human dimensions and power dynamics are interwoven in every principle. Through this analysis, we demonstrate that a feminist approach is instrumental to establish a socially just and ecologically sustainable agroecological transition. Full article

Agroecology has become an ideological foundation for social and environmental transformation in sub-Saharan Africa. In Senegal, agroecological advocacy coalitions, made up of farmers’ organizations, scientists, NGOs, and IOs, are using agroecology as an umbrella concept for proposing policy changes at multiple scales. We describe the history of the agroecological movement in Senegal in the context of the constitution of a national advocacy coalition. We then examine the “repertoires of collective action” mobilized by the coalition. Four repertoires are identified: technical support and knowledge co-production, territorial governance, alternative food networks, and national policy dialogue. Our analysis highlights the potential that these multi-level approaches have to sustainably transform the current food systems in sub-Saharan Africa. However, our research also reveals the limited agency of farmer organizations and the limitations of a movement that is strongly dependent on NGOs and international donors, leading to a “projectorate” situation in which contradictory policy actions can overlap. We further argue that, although the central government has formally welcomed some of the principles of agroecology into their policy discourse, financial and political interests in pursuing a Green Revolution and co-opting agroecology are pending. This leads to a lack of political and financial autonomy for grassroots farmers’ organizations, limiting the development of counter-hegemonic agroecology. We discuss the conditions under which territorial approaches, and the three other repertoires of collective action, can have significant potential to transform Sub-Saharan Africa in the coming years. Full article

This study sheds light on a new generation of Swedish food producers, market gardeners, who are attracting attention in terms of food system sustainability, prompted by increasing consumer awareness about the value of healthy and locally produced food. Market gardening is part of a global agroecological movement opposed to industrialized agriculture and its negative impacts on the environment and rural communities. These food producers challenge the incumbent agri-food regime through the building of alternative food networks. This case-based study involving 14 young vegetable producers showed that young people who engage in market gardening are strongly motivated by dual incentives, namely entrepreneurship and transformation to sustainability. Six main competences were identified as important for market gardeners: practical skills related to growing vegetables, business management, innovation and continuous learning, systems thinking, pioneering, and networking. Individuals develop their skills through continuous experiential learning and gain knowledge through peer-to-peer learning using social media. However, they need to acquire certain skills relating to their daily work in the field and to managing a business. Market gardeners currently face a number of barriers erected by the sociopolitical environment, in particular regarding access to research-based knowledge, extension services, and business support. Full article

Rural Ecuadorians are experiencing a double burden of malnutrition, characterized by simultaneous nutrient inadequacies and excesses, alongside the social and environmental consequences of unsustainable agriculture. Agriculture can support farmer nutrition by providing income for market purchases and through the consumption of foods from own production. However, the nutritional contributions of these food acquisition strategies vary by context. We surveyed smallholder women farmers (n = 90) in Imbabura province to assess the dietary contributions of foods obtained through market purchase, own production, and social economy among farmers participating in agroecology—a sustainable farming movement—and neighboring reference farmers. We found that foods from farmers’ own production and the social economy were relatively nutrient-rich, while market foods were calorie-rich. Consumption of foods from own production was associated with better nutrient adequacy and moderation, whereas market food consumption was associated with a worse performance on both. Food acquisition patterns differed between farmer groups: agroecological farmers obtained 44%, 32%, and 23% of their calories from conventional markets, own production, and the social economy, respectively, while reference neighbors obtained 69%, 17%, and 13%, respectively. Our findings suggest that, in this region, farmer nutrition is better supported through the consumption of their own production than through market purchases, and sustainable farming initiatives such as agroecology may be leveraged for healthy diets. Full article