Conservation Agriculture Research Updates - April 2026

This review looks at the role of conservation agriculture (CA) needed to transform agriculture to a sustainable intensification that will be needed to positively influence climate change issues, biodiversity, future food security and soil health. The Authors contend that CA offers the only universally applicable agricultural practices that can be adopted at scale and speed, across all agro-ecological zones within the coming 1–2 decades. The paper presents the rationale, evolution, and prospects of CA across the world. The review presents information on CA adoption globally and estimates the potential for expansion to 2050. The Authors summarize that CA "offers a universally applicable agricultural practice that can be adopted at scale and speed."

This paper from Pakistan reviews using existing literature the impact of CA on SOC, GHG fluxes, soil health and crop yield. The found that CA management significantly increased soil properties including physical (bulk density, water retention, and aggregate stability), chemical (pH, nutrient availability, and C:N ratio) and biological (microbial and enzymatic) activity. They conclude that "These improvements are critical for maintaining soil health and boosting agroecosystem resilience to climate change. The findings underscore CA as an effective strategy for preserving SOC, improving soil quality, reducing agriculture's environmental footprint and enhancing climate change adaptation in agricultural systems."

This review looks at the latest research on regenerative management strategies and the effects on soil organic carbon content and turnover, since the authors point out the importance of SOC for soil health. Regenerative strategies included CA, rotation, cover crops, organic management, biochar and agroforestry that all improve carbon sequestration. The conclusions are based on 283 studies that had both sort- and long-term field trials. They conclude that their research "outlines the benefits, challenges, and economic prospects associated with these strategies, emphasizing the significance of improving SOC management to promote soil sustainability and mitigate climate change consequences."

This paper discusses the pros and cons of the term Regenerative Agriculture in Europe. They looked at 849 actors web sites and interviewed 131 farmers who use this system from 5 European countries. They mapped actor types, locations, sizes, and promoted themes (e.g. biodiversity) and practices (e.g. no-tillage). Their results suggest that RA originated as a grassroots approach to farming that was co-opted by non-farming actors around 2020. Since 2021 the number of RA farmers has declined as the focus shifted from farming to marketing driven by multinational companies. Interaction with Policy makers was limited and most of the actors were urban-based NGO's. Among nearly 5000 cited practices, cover cropping and crop diversification dominated. They concluded that "the burden of proof for regenerative agriculture to be sustainable lies in its ability to regenerate the environment—until then, its impact remains uncertain."

This review assesses the effect of CA management on soil biological, chemical and physical properties. Results show that CA improves soil structure, enhances soil organic carbon sequestration, promotes microbial activity, increases water-use efficiency, and reduces erosion and nutrient losses. The paper also reports on environmental, economic, and social benefits of CA that include biodiversity conservation, reduced greenhouse gas emissions, improved yields, and increased food system resilience. They also look at the the socioeconomic conditions, institutional frameworks, and policy interventions that shape CA adoption and impact and the CA research gaps and future of CA directions.

This paper uses the term Resource Conserving Technologies (RCT's) as practices that help reverse the negative affects of climate change on food and water productivity. RCT's they include are CA, cover crops, mulching, drip irrigation, soil moisture sensors-based smart irrigation, rainwater harvesting, site-specific nutrient management, leaf color chart, fertigation, and precision agriculture that can result in long-term sustainability by enhancing food production and sequestering soil carbon in conventional field farming. They can also reduce greenhouse gas emissions (GHGs), result in higher yield and water savings. Some RCT's require high-cost machinery and it is suggested they should be tested in diverse production systems for sustainability and large-scale adoption. 

This is another article on soil health in this special edition on soil health of this journal. One question raised is "What is soil health"? Also how does one describe it to non-soil scientists and why it is so important to everyone? The authors of this paper who organized this series of papers on soil health share their thoughts and own opinions on soil health in this paper. The conclude by saying "Our goal is that each of you will be enriched by the articles in this issue and the impact of soil health on conservation and the future of our ecosystem."

This paper mentions that maize, wheat and rice account for 90% of the total cereal production globally. They suggest that a new approach to cereal production is needed to overcome food insecurity, climate changes and unsustainable land use. They propose that integrated crop management (ICM) is an avenue to explore. This article reviews 108 studies from literature over the last 23 years.The review the data from Asia, China, USA, and Africa. Their data shows that ICM increased yields in rice, wheat and maize but despite this potential, widespread adoption faces technical, climate-related and economic issues.  They suggest that overcoming these issues requires targeted training, improved extension, and supportive policies.

This paper utilized bibliometric analyses to map the conceptual and intellectual structure of soil health research from 1996-2021. They reviewed 984 peer reviewed papers that they divided into 3 major research clusters. The analysis revealed critical gaps, including limited integration of pedological modeling to quantify ecosystem services and insufficient long-term studies on conservation agriculture. They recommend that interdisciplinary collaboration among agronomists, microbiologists, policymakers, and climate scientists to align soil health metrics with global targets providing a roadmap to integrate soil health into climate-smart land-use policies.

This review article explores the role of farmer agency in enhancing the effect of extension models related to soil health. They want to empower farmers to innovate and adapt knowledge to identify more efficient systems. It reviews several factors that can improve farmer agency including education, economic opportunities, social networks and supportive policies. The paper proposes the need for policies and programs to improve farmer decision-making opportunities and farmer centered learning platforms, digital tools and to strengthen social networks with the hope that adoption and adaptation soil health solutions improves.

This review looks at several ways to improve soil physical health. They define this as physical, chemical and biological characteristics. It includes structure, porosity,  and water retention. They include  soil management like CA, cover crops, and organic amendments. They also suggested precision farming and remote sensing as ways to monitor and manage soil health. They found they had constraints to undertake this and so recommend that future efforts focus on multidisciplinary research to better understand complex relationships.

This narrative review synthesizes the insights of the soil health practices adoption literature, with a focus on common farming practices that can improve soil health and enhance crop yields, reviewing the results of various approaches and pointing out the challenges and opportunities for implementing sustainable agriculture on a larger scale.Results show that Conservation no-till is better for soil health than conventional tillage. However, agricultural yields increase more with intercropping, crop rotation, and cover crops than monocropping. The paper identifies the most suitable practices for improving soil health

This study looks at the impacts of no-till individually and with other CA practices on nitrous oxide (N20) emissions and yields using a review of 1270 observations from 86 peer-reviewed articles. Results sho that yields increased by 9.1% while reducing N20 emissions by 6.8% compared to conventional tillage (CT). The results also showed that reduction of N20 emissions and yields were even greater when using other CA practices like residue retention and rotations; reductions in N20 of 15% and increase in yields of more than 30%. The mitigation of N20 emissions was higher in dry versus humid climates. They conclude that "Smallholder farms in Central Asia, South Asia, and sub-Saharan Africa appear particularly suitable for the adoption of conservation agriculture, whereas, in humid climates, high nitrogen (N) input management and silt-clay loam soil should be applied with caution. 

This review article looks at the importance of plant residues with no-till and rotation (CA management). The paper mentions that rotations have spread throughout the World, but only one or two of the three principles of CA are. used in practice with no-till and crop residue more efficient at using rainfall and a more resilient agricultural system compared to conventional tillage but also no-tillage without residues. Without residues, yields are reduced. The authors show that "In areas with low rainfall, the yields were highest obtained in farms that combined NT treatments and the use of crop residues, whereas in rainfed areas with conventional (CT) systems, when residues were removed from NT systems, wheat and maize yields were drastically reduced." Also in many small-scale farms, the residue yield is low and has many competing uses. Crop residues are generally burned in the fields or fed to livestock. They conclude that NT+ R is needed for CA to be successful and adding rotation can provide even better results. 

Tillage practices have been used by farmers for centuries to prepare soil, manage residues, and control weeds but with consequences for soil health and soil degradation. This global review critically examines and synthesises current research on the impact of various tillage practices like conventional (CT), reduced (RT), and no-till (NT) tillage systems on greenhouse gas emissions (GHG), soil health and agricultural sustainability from scientific papers written on this subject. Some results presented show that CT increases C02 emissions through soil disturbance and oxidation of organic matter, while RT and NT reduce C02 and mitigate N20 and CH4 emissions. NT also enhances water retention and thus drought stress. The author concludes that "RT and NT practices emerge as pivotal strategies for reducing greenhouse gas emissions and advancing agricultural sustainability through improved soil health and water retention."

This interesting paper reviews through 150 peer-reviewed studies published from 2013-2024 the impacts of rotation and cover crops, the former an important pillar of CA and the latter a valuable addition to CA for weed control and providing surface mulch when it is possible to include. They identified papers that identified impacts by monitoring and modeling. Results show that rotation can increase yields, enhance soil moisture retention, fertility and mitigate pest, weed, and disease pressures while improving environmental sustainability. The paper also reviews modeling frameworks to simulate rotation practices. The paper discusses agricultural effects, environmental and soil health impacts, modeling and monitoring approaches, and limitations and future research directions. They conclude that "these insights provide actionable guidance for farmers, extension agents, and policymakers to design more resilient and sustainable cropping systems tailored to local environmental and economic conditions."

This review from Zimbabwe reviews the Pfumvudza/Intwasa initiative that has been promoting conservation agriculture (CA) practices among smallholder farmers in this country. In terms of policy this project provides guidelines for implementation, resource allocation, and support systems. The review examines the role of government policies and institutional frameworks in sustaining CA practices in Zimbabwe using a literature review analyzing peer-reviewed articles, policy documents, and government reports published between 2000 and 2024. Results both strengths and limitations. The authors mention that policies promote conservation agriculture, inclusive participation, and resource distribution, but challenges such as inadequate institutional coordination, limited extension services, and funding constraints limit the success of this program. The report recommends "policy harmonization, targeted investments in extension services, and the promotion of equitable resource distribution. Additionally, leveraging technology for monitoring, enhancing market access for smallholders, and fostering public-private partnerships will support the scalability and sustainability of this project"

This paper suggests that CA adoption is crucial for enhancing SOC and mitigating climate change for future food security. The research assesses the effectiveness of various factors controlling SOC sequestration derived from literature reviews and 469 data points spanning 42 years.Results showed that CA significantly increased  SOC by almost 30% compared to CT. The highest SOC result was no-till, plus chemical fertilizer (CF), and straw return (S). Interestingly, CF + S or CF + manure led to greater SOC sequestration compared to the application of CF alone. Also, the annual SOC change rate (ASCR) of CA is closely linked to the experimental duration of its application, demonstrating an overall exponential decline followed by stabilization after several years. Overall. this paper contributes to the understanding of how CA sequesters carbon in soil.

This review from Romania highlights the importance of soil health for sustainable agriculture and identifies practices that result in improved soil health that includes, physical, chemical and biological properties. The explored rotation, cover crops, no-till, CA, and use of organic amendments to achieve SH properties that includes better soil structure, increased organic matter and biological diversity. Increasing soil organic carbon (SOC) is vital. Their results show that CA is a better option to restore soil health than conventional systems although they mention that this topic is still controversial among scientists and farmers. 

This paper from India starts by saying India with 121 million small and marginal holdings, faces challenges from a growing population, limited land, and restricted resources.Their review identifies potential innovative technologies suitable for resource poor farmers and what effective ways are needed like public-private partnerships, cooperative farming, and custom hiring centers to overcome adoption barriers and identified enabling factors such as funding, education, and institutional support. They also suggest that a multi-faceted approach with policy, financial, and educational support is essential for adoption. They conclude that findings are relevant to policymakers and development practitioners focused on enhancing food security and resilience in smallholder farming.

This review article looks at the relationship between agroecology and water management in order to identify strategies for sustainable agriculture in North African countries. The paper looks at agroecological approaches to water management, including agroforestry, conservation agriculture, water-efficient irrigation, and landscape design. It looks at integrating biodiversity for water regulation, leveraging ecosystem services for purification, and adopting advanced technologies, such as precision agriculture and remote sensing, and policies needed for efficient water management. They conclude that there is a need for interdisciplinary collaboration among agronomists, hydrologists, ecologists, policymakers, and local communities to develop holistic approaches that seamlessly integrate agroecology and modern water management, ensuring sustainable agricultural systems in the region. 

This paper from NW Cambodia compares use of conventional tillage (CT) with CA in maize cultivation looking at soil health, agronomic, and economic differences. The experiment was set up in 2020 comparing CT and CA with one cover crop (CAS) and CA with a mix of three cover crops (CAM). Soil health was assessed using a Biofunctool. Soil health (SH) was positively increased under CA. However, in the 1st year CA. had lower plant density and suggested that there was a need to improve NT sowing methods. This problem resulted in no significant differences in maize yield between the 3 treatments. Gross value added under CA was 12.7% less than CT in 2021, it surpassed CT by 43% in the second year.

This review explores a number of soil and water conservation practices, organic amendments, and agroforestry for specific soil types (7)  for the many diverse agroecological zones in Africa. In particular it looks at the role of soil through physical management to ensure resilience to climate change using long-term studies that are essential for improving soil structure, moisture retention, reducing erosion and enhancing SOM. However, adoption of these practices that improve resilience to climate change faces challenges due to diverse soils and ecologies, barriers to adoption and resource constraints. The authors advocate an integrated approach combining local expertise with scientific advancements and appropriate policy interventions.  to achieve the needed resilience.

As the global population rises, ensuring food security through sustainable agriculture practices has become imperative to achieve sustainable development goals (SDGs). This research review endeavours to add to the discourse surrounding the obstacles and possibilities in shifting towards sustainable agriculture globally, exploring the roles of SDGs and traditional farming practices.Their findings underscore the urgent need for a holistic and integrated approach that aligns with the SDGs, fostering resilience, environmental stewardship, and equitable development within the global agricultural sector.

The authors of this paper are looking at traditional grains like sorghum, pearl and finger millet to combat climate change and drought in sub-Saharan Africa (SSA) as alternatives to maize the staple food in this area. The main objective of this review paper is to identify suitable equipment for smallholders to mechanize growing these traditional grains. They reviewed six databases to find suitable equipment used globally. They found that the mechanisation of traditional grain production operations is lagging behind that of other cereals and so there is a need to work on development of suitable equipment  for smallholder farmers. They suggest use of two-wheel tractors and service providers as a way to move forward. Policy decisions and recommendations for improvement were made.