Conservation Agriculture Research Updates - April 2026

This paper from the UK looked at seven key mycorrhizal and endophytic fungal structures from soil samples taken from 5 mixed cover cropped and 5 conventionally managed fields growing spring beans. The cover cropped sites grew the CC in the Winter, whereas the conventional one was tilled heavily and then left fallow until planting a spring crop in March. Results showed that wherever CC were grown there were significantly higher abundance of hyphae, arbuscules, vesicles, moniliform hyphae, and microsclerotia, but not spores or chlamydospores. They conclude that "Since these structures are known to be associated with nutrient exchange, overwintering and long-term survival, energy storage, and branching and inoculation, cover cropping practices are likely to improve the functioning of mycorrhizal and endophytic fungi."

This paper from Texas (semi-arid area) looks at legume and non-legume cover crops (CC) in crop rotations on crop yields, SOC sequestration, GHG emissions, water use efficiency and the farm carbon footprint compared to business as usual (BAU). They also looked at the long-term impact of these practices using the DSSAT model. The results showed that the CC resulted in significant agronomic and environmental benefits compared to BAU. They conclude that "their findings emphasize the critical role of CCs in climate-smart agricultural strategies, highlighting the need to optimize rotations and nutrient management practices to sustainably intensify agriculture in semi-arid regions. 

This paper from Iran explores the factors that are responsible for adoption of CA in Iran since they suggest this system is important for environmental sustainability and resilience. They show it helps reverse soil degradation by improving moisture retention and increasing soil organic matter. Data were collected through questionnaires and analyzed using structural equation modeling. They conclude that "attitude and self-efficacy emerged as the most significant determinants influencing farmers' decisions to adopt CA. The information will provide valuable recommendations  for policy makers hoping to promote CA. 

This paper talks about the role of soil as a basis for all terrestrial life as well ecosystem services for nature and mankind. It is essential to protect, restore and manage soils in a sustainable way so that soil health is maintained and improved. This will require humans working together including the various stakeholders in the public, private, scientific and extension groups but also policies to make sure the soil is a protected resource. 

I included this book that was published in 2021 because it deals with the role of cover crops that are becoming more popular in modern agriculture and used in sustainable agriculture like conservation agriculture to provide the essential surface mulch needed to make no-till systems productive. This book is an encyclopedia of cover crop management by 2021. Papers in the 18 chapters indicate the long-term benefits for soil health, structure, water quality, nutrient contributions, soil biodiversity, air quality and climate change. The book looks at the "whys" as well as the "hows" for different locations and how to terminate them when needed. As part of a continuous no-till system, cover crops provide long-term biological, chemical and structural benefits. The resulting increase in soil organic matter means the agronomic crop yields benefit from better water infiltration and water holding capacity, greater availability of nitrogen and other nutrients, deeper rooting, and increased soil microbial activity in the root zone.

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 paper from Canada looks at application rates of Glyphosate (GBH) to terminate cover crops and how this influences soil microbial communities. They used 3 GBH application rates in maize, soybean and wheat fields grown with direct seeding (NT) with and without cover crops. Results showed that DS+CC did not significantly impact microbial richness compared to DS, but did alter specific abundance among prokaryotes and eukaryotes but that the three crops significantly influenced the composition of eukaryotic communities in 2018 and 2019, but not prokaryotic communities. They conclude that the study calls for sustainable agricultural practices that preserve microbial diversity, which is essential for maintaining ecosystem services and soil health.

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 article reviews looks at conventional tillage (CT) and no-tillage (NT) systems on wheat yield since this has a direct effect on farmer adoption. They used a collected international database that showed NT is adaptable at all locations. Crop rotation was also important as was residue retention. The data was collected over the past 40 years and demonstrates the importance of NT in increasing the yield of wheat.

This article looks at how nature manages resources and describes management of a living soil and its productivity using nature's laws to guide crop management. It contends that although tillage was considered necessary for agriculture it is now considered as the cause of soil degradation and violates the laws of nature. Soil tillage over time destroys soil biological, chemical, physical and hydrological properties resulting in soil degradation and lower yields. CA systems that include much reduced or no-tillage with surface mulch and crop rotation on the other hand emulate nature.  and offer farmers, both large and small, productivity, economic and environmental benefits. Te authors conclude that application of CA based management will be needed to reduce the impact of climate change on future food security.

This paper from Italy looks at a disc chain harrow for terminating cover crops and preparing a seedbed in a conservation tillage (CA) system that allows more timely planting. The cover crop was hairy vetch followed by soybeans. A total of three trials were carried out.  (1) compare two disc types in two different front + rear combinations and two different working speeds; (2) evaluate the seedbed preparation by the disc chain in terms of soybean establishment as a following cash crop; (3) evaluate operational characteristics (working speed, fuel consumption, absorbed power, etc.) of the disc chain at the two different speeds. The results show that a disc chain harrow was successful using low pulling force, low energy and fuel consumption as compared to other conservation practices. It does not say if soybeans were direct drilled.

This chapter in this reputable book discusses the issues of urbanization, soil degradation, and inappropriate farming practices and the pressure that results on soil, water,and vegetation and subsequently food and nutritional security, and at the same time providing ecosystem services and meeting the Sustainable Development Goals (SDG's). They discuss the role of No-till (NT) and Conservation Agriculture (CA) is reversing these negative trends. They cite long term experiments that provide information on improving soil health, SOC sequestration, GHG emissions, climate change mitigation, and resource use efficiency all impacting future food security. This chapter discusses the effect of NT/CA on soil health, nutrient stratification, SOC dynamics through modeling, SOC sequestration, GHG emissions, socio-economic condition in adoption and also suggesting the future perspectives on NT and CA.

Soil health has become a foundation for sustainable goals associated with mitigation of climate change and reversing soil degradation and loss of biodiversity. There is also an array of indicators of soil health but what are the key indicators important for soil health outcomes and ecosystem functioning? This paper proposes and integrated approach to assess soil health.They list important key indicators because of their position in the soil food web and linkages to key soil processes. They recommend that future soil health assessments directly measure soil organisms in conjunction with indicators that reflect key ecosystem functions. 

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 10-year study from India compared 2 conventional tilled (CT) puddled transplanted rice followed by either CT wheat or NT wheat with 6 different NT Direct seeded (DSR) rice followed by NT wheat treatments. Details can be found in the abstract or full paper since two treatments also used Sesbania (brown manure) in the system and 2 used an additional mung bean crop. A summary of the results showed that the NT wheat treatments were better than the CT wheat but CT rice had a higher yield than DSR rice. The overall rice-wheat system also was better than the traditional system despite the lower rice yield. Soil fertility, SOC, soil health, GHG emissions, and profitability were better in the CA systems compared to the CT one. The recommended that more research is needed to control weeds, nutrient needs and water management to improve the DSR treatment.

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 is a chapter from the Cover Crops and Sustainable Agriculture book listed next that is devoted to cover crop use in conservation agriculture. This chapter looks at the issue of an expanding global population (10 billion by 2050) with a traditional farming system that uses intensive tillage and monoculture that is slowly degrading the soil, the environment and the ability to feed the future population, especially as climate change adds a further challenge for food production. This chapter provides information on cover crop mixes that are relevant for conservation agriculture to not only improve the benefits of a surface residue mulch needed for no-till systems but also a way to improve soil health vital for sustainable agriculture and future food security.

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 starts by saying challenges from climate change require new eco-friendly systems to make farming economic with social dimensions compatible with the environment plus ecosystem resilience. The suggest that CA can help by increasing C-sequestration in soils and plants. This research looks into the benefits of improved SOC when using CA in Portugal from the INFOSOLO legacy database was analyzed through statistical methodologies and machine-learning approaches. 

This paper quantifies the Ecosystem Services from 13 years of using CA practices in a maize-wheat system in India. The treatments were conventional tillage (CT), zero tillage with planting on flat land with residue (ZR + R), permanent broad beds with residue (PBB + R), permanent narrow beds with residue (PNB + R). The CA-based practices recorded higher value of provisioning ES values as compared to CT. The highest economic value of regulating ES was observed under PBB + R, which was 61% higher than that of CT. PBB + R is a better management alternative for better TES while ensuring higher crop productivity than CT. The results can be used to formulate the payment for ecosystem scheme by policy makers.

This paper did an extensive literature review to look at the biodiversity of pulse systems and ecosystem services using different management systems in terms of food/feed provision and soil health.  Most studies examined soil quality, especially chemical quality, followed by grain yield. Very few studies surveyed biodiversity, most of which used arable flora as an indicator. Their results and conclusions showed significant positive impacts with organic farming on biodiversity, no tillage on soil health and yield, and rotations on yield.

This is a Springer Science book chapter that is part of a book series " Advances in Global Change Research ((AGLO,volume 78))". The chapter says that "agricultural research should focus on developing eco-friendly and sustainable crop production systems with higher crop productivity to achieve sustainable development goals. Also that conventional agriculture that has excessive tillage and crop residue removal is degrading soil health by losing SOC, losing good soil physical properties including compaction and negatively impacting soil biology. It concludes that "global policy initiatives should promote CA practices to conserve natural resources and better maintain soil health, as our sustainable future strategy for crop production."

This paper describes an integrated 10-year CA cotton experiment in Louisiana, USA, using cover crops plus NT instead of conventional tillage (CT) that was assessed cotton yield using a biogeochemical denitrification-decomposition model. 4 cover crops were used: hairy vetch, winter wheat, native grass (NG) and crimson clover. It also had 4 nitrogen levels (0, 50, 100, 150 kg N/ha). They also estimated carbon sequestration and ecosystem functionality. Their results using the scenario analysis showed that 50kg N and a single irrigation was most beneficial for maximizing the cotton yield with cover crop incorporation in the NT system over long term. They conclude that implementation of a cover crop or crop residue system instead of increased N application, seed rates, and irrigation events under NT practices would be beneficial.

I added this paper on cover crops since there is a surge in the use of this management system in countries where CC's can be introduced into the agricultural system. This paper used 43 meta-analysis and review studies that compare cover crops to mono-cropping to identify benefits, challenges, and trade-offs among ecosystem services when cover crops are introduced. The paper summarizes the knowledge of CC effectiveness across 11 ecosystem services in 3 categories -- regulating, provisioning, and supporting. Factors chosen include farm practices, planting and termination season, species of cover and main crop, climatic zone and soil properties, cover crop biomass, and residue management. One main highlight was that cover cropping enhances soil biodiversity and nutrient cycling. Others can be found in the paper. Their overall conclusion is that  that a multifunctional cover crop implementation provides substantially more regulating and supporting than other ecosystem services.

This paper is a literature review of meta-analyses dealing with the implementation and performances of CA in France. They suggest that past CA research focused on productivity and soil quality when in fact other issues like biodiversity and profitability are mentioned less. An online survey showed that 63% of respondents thought that CA helps reduce pesticide use, 91% that CA improves water use efficiency, and 77% that CA helps to store carbon and achieve the objectives of the 4 per 1000 international initiative. The authors suggest that the definition for CA be moved to performance-based metrics that address different ecosystem services. Issue like climate change, biodiversity loss, water pollution are some suggestions.