The Role of Agronomic Interventions in Mitigating Climate Change Impacts on Crop Growth and Yield

Authors: Adyant Kumar*1 and Birendra Singh2

Journal Name: Plant Science Review

DOI: https://doi.org/10.51470/PSR.2023.04.01.29

Keywords: Agronomic interventions; climate change adaptation; crop yield; conservation agriculture; precision irrigation; crop diversification; drought tolerance; climate-smart agriculture.

Abstract

Climate change—characterized by rising temperatures, more frequent heat and drought events, shifting rainfall patterns, and elevated atmospheric CO₂—poses major threats to crop growth, yield stability, and global food security. Agronomic interventions, which modify management practices in fields and farms, represent a critical line of defense to buffer crops against climate stress. This review synthesizes recent literature on agronomic strategies that can help maintain or improve crop growth and yield under climate change. Key interventions include use of drought- and heat-tolerant cultivars, altered planting dates, optimized fertilization (including nutrient use efficiency), improved water management (e.g. precision irrigation, mulching), crop diversification (intercropping, crop rotation), conservation agriculture practices (reduced tillage, cover crops), agroforestry, soil amendments, and carbon sequestration techniques (e.g. enhanced weathering). We examine evidence of effectiveness, trade-offs, barriers to adoption, and co-benefits (including mitigation of greenhouse gases). Also discussed are knowledge gaps and policy/practice implications. Overall, while many agronomic interventions show promise in increasing resilience and yield in smallholder and commercial systems, their success depends heavily on local conditions (soil, climate, socio-economic factors) and support systems (extension, access to improved seeds, monitoring). Recommendations are offered for integrating agronomic interventions into climate-smart agriculture frameworks to enhance global food security under changing climatic conditions.

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1. Introduction

Climate change represents one of the most significant challenges to global agriculture in the 21st century. The agricultural sector is not only a major contributor to greenhouse gas (GHG) emissions—through land use change, fertilizer use, livestock production, and energy inputs—but also one of the sectors most vulnerable to climate variability and extreme events [1]. Global mean surface temperatures have risen by approximately 1.1 °C above pre-industrial levels, and this warming is projected to continue, with profound implications for food production systems worldwide [2]. Changes in precipitation regimes, the intensification of droughts and floods, and more frequent heatwaves directly affect crop growth, reproductive development, and yield stability. It is estimated that temperature increases of 1–4 °C could reduce yields of major crops such as maize, rice, and wheat by 5–14% in many tropical and subtropical regions, while precipitation declines could lead to even greater productivity losses [3]. In addition to direct effects on crop physiology, climate change influences pest and disease dynamics, soil fertility, and water availability, creating cascading stressors for agricultural productivity. Increased atmospheric CO₂ concentrations can stimulate photosynthesis and water-use efficiency in some crops, yet these benefits are often offset by nutrient dilution, heat stress, and water scarcity [4]. Moreover, yield instability is projected to rise, threatening food security and rural livelihoods, especially in developing nations that rely heavily on rainfed agriculture [5]. Without adaptive interventions, the combined effects of rising temperatures, altered hydrological cycles, and degraded soil health could undermine decades of progress in agricultural productivity.

Agronomic interventions—defined broadly as field management practices and technology-enabled modifications in crop production—offer a powerful and practical avenue to strengthen resilience and mitigate adverse effects of climate change. Unlike long-term genetic improvement programs, agronomic strategies can be deployed rapidly and adjusted within a few cropping seasons to respond to local climatic realities. These interventions encompass a wide spectrum of management options, including the adjustment of sowing dates and crop calendars, adoption of stress-tolerant cultivars, improvement of soil moisture conservation, optimization of nutrient and water management, diversification of cropping systems, and implementation of soil health and conservation practices [6]. When designed and implemented effectively, these practices not only reduce exposure to climate-induced stress but can also improve yields, enhance resource-use efficiency, and increase carbon sequestration, thereby contributing to both adaptation and mitigation goals.

Recent studies have shown that adaptive agronomic measures can offset a substantial portion of yield losses projected under future climate scenarios. For instance, shifting planting dates and crop varieties to align phenological stages with favorable weather conditions can help maintain yield stability under warming climates [7]. Similarly, precision irrigation and soil moisture management techniques reduce vulnerability to drought stress, while integrated nutrient management enhances resilience by sustaining soil fertility and microbial activity [8]. Conservation agriculture, including reduced tillage and cover cropping, has been shown to improve water retention, reduce erosion, and enhance soil organic matter—key components of climate adaptation in dryland systems [9]. Furthermore, diversification strategies such as intercropping, crop rotations, and agroforestry systems can buffer against climate extremes by spreading risk and improving ecological balance [10]. These interventions, when aligned with local conditions and supported by enabling policy frameworks, can transform conventional agricultural systems into more resilient and sustainable ones. However, their effectiveness depends on site-specific factors such as soil type, water availability, climatic zone, and socio-economic constraints. For example, while mulching and reduced tillage improve soil moisture retention in semi-arid regions, these same practices may have limited impact or even negative effects in waterlogged tropical environments [11]. Similarly, the benefits of high-efficiency irrigation or improved cultivars depend on access to technology, infrastructure, and extension support.

The urgency of integrating agronomic interventions into broader climate adaptation and mitigation frameworks is underscored by the need to sustain food production for a growing global population projected to exceed 9 billion by 2050. Climate-smart agriculture (CSA), as advocated by the Food and Agriculture Organization [12], provides a conceptual framework that links productivity, adaptation, and mitigation. Within CSA, agronomic practices represent a critical first line of defense—offering immediate, cost-effective, and scalable solutions that complement genetic, institutional, and technological innovations.

This review therefore synthesizes current knowledge (primarily from 2010–2020) on agronomic interventions aimed at mitigating climate change impacts on crop growth and yield. It seeks to address four key questions: (1) Which agronomic strategies have demonstrated effectiveness across various agroecological zones? (2) What mechanisms underpin their resilience benefits? (3) What trade-offs and barriers limit their large-scale adoption? and (4) How can these practices be systematically integrated into national adaptation planning and climate-smart agriculture policies? By bridging empirical evidence, modeling insights, and practical case studies, this paper provides a holistic understanding of how targeted agronomic interventions can contribute to resilient and sustainable agricultural systems in a changing climate.

2. Key Agronomic Interventions and Evidence

Agronomic interventions represent a diverse suite of management practices aimed at improving crop resilience and productivity under increasingly variable and extreme climatic conditions. While genetic breeding and biotechnology contribute substantially to crop adaptation, field-level agronomic strategies provide immediate, scalable, and context-specific options for farmers. These interventions address water, nutrient, and thermal stress; optimize crop–soil–climate interactions; and enhance system sustainability, the principal agronomic strategies that have demonstrated measurable benefits in mitigating climate change impacts on crop growth and yield.

2.1 Drought-, Heat-, and Stress-Tolerant Cultivars

One of the most direct and widely applied strategies involves developing and deploying cultivars with enhanced tolerance to abiotic stresses such as drought, heat, and salinity. Advances in conventional breeding, marker-assisted selection, and genomic tools have enabled the release of stress-resilient varieties in several major crops including maize, rice, wheat, and sorghum. For instance, in West Africa, the adoption of drought-tolerant maize varieties has been shown to reduce projected yield declines by up to 20–30% under climate change scenarios, effectively converting estimated yield losses of approximately 12% under business-as-usual conditions into neutral or even positive outcomes [13-14]. Similarly, heat-tolerant wheat lines developed for South Asia maintained higher grain filling duration and kernel weight during terminal heat episodes [15]. Stress-tolerant rice varieties such as “Sahbhagi Dhan” (drought-tolerant) and “Swarna-Sub1” (flood-tolerant) have improved yield stability across diverse stress environments in India and Bangladesh. However, while these cultivars provide significant yield protection, their success depends on local adaptation, timely seed availability, and integration with complementary agronomic practices.

2.2 Timing of Planting, Growing Season Adjustments, and Crop Cycle Modulation

Adjusting sowing or planting dates and modifying crop cycle lengths are among the most cost-effective and readily implementable strategies to cope with climatic variability. By aligning crop phenology with favorable temperature and moisture windows, farmers can avoid periods of extreme heat or drought during sensitive growth stages. For example, modelling studies of maize and sorghum in sub-Saharan Africa have shown that advancing planting dates by 10–20 days can increase yields by 5–10% under projected 2050 climate scenarios [16]. Similar benefits have been reported for rice in Southeast Asia and wheat in the Indo-Gangetic Plains, where shifts in planting schedules allowed crops to avoid terminal heat stress [17]. Selection of cultivars with appropriate growing period lengths—either short-duration for drought-prone regions or long-duration for cooler climates—can further optimize resource use efficiency. The effectiveness of this intervention is enhanced when combined with localized seasonal forecasts, decision-support tools, and participatory approaches that involve farmers in adaptive planning [18].

2.3 Water Management: Precision Irrigation, Mulching, and Soil Moisture Conservation

Water management is central to climate adaptation, as water stress is one of the primary constraints to yield stability. Precision irrigation technologies such as drip and sprinkler systems, soil moisture sensors, and deficit irrigation strategies have demonstrated significant potential to enhance water productivity. Studies in Mediterranean and semi-arid environments show that deficit irrigation can maintain up to 80–90% of full irrigation yield while reducing water use by 20–40% [19]. Mulching—whether organic residues, plastic films, or bio-based alternatives—reduces soil evaporation, moderates temperature fluctuations, and improves root zone moisture. Conservation tillage further contributes by increasing water infiltration and reducing surface runoff. In an extensive review, [20-21] concluded that combining water-saving irrigation with soil moisture conservation practices can reduce yield losses under drought by up to 30%, depending on crop and soil type. Moreover, integrating rainwater harvesting structures in dryland systems enhances resilience against erratic rainfall, especially in sub-Saharan Africa and South Asia.

2.4 Nutrient Management and Fertilization Efficiency

Optimizing nutrient management enhances both adaptation and mitigation outcomes. Climate stress often alters nutrient uptake and soil microbial processes, making balanced and efficient fertilization essential. Integrated nutrient management (INM)—combining organic amendments, crop residues, and inorganic fertilizers—sustains soil fertility while improving carbon sequestration potential. Enhanced-efficiency fertilizers (e.g., controlled-release nitrogen, nitrification inhibitors) have reduced nitrous oxide emissions and improved nutrient use efficiency by up to 25% [22]. A meta-analysis of maize and rice systems revealed that synchronizing nitrogen application with crop demand and adopting site-specific nutrient management improved yields by 10–15% compared with conventional blanket application [2]. However, fertilizer intensification alone is insufficient; it must be integrated with soil moisture management, cultivar selection, and appropriate tillage practices to ensure long-term sustainability [4].

2.5 Crop Diversification, Intercropping, Crop Rotation, and Agroforestry

Crop diversification provides ecological buffering against climatic extremes by distributing risk across species and time. Intercropping systems—such as maize-legume or millet-pigeon pea—have consistently shown improved Land Equivalent Ratios (LERs) of 1.2–1.4 compared with monocultures [12]. These systems enhance nutrient cycling through biological nitrogen fixation, improve soil structure, and suppress pests and diseases. Crop rotations with legumes or cover crops increase soil organic matter and reduce erosion, thereby improving resilience to heavy rainfall events. Agroforestry systems, which integrate trees with crops, enhance microclimatic regulation by reducing heat stress and improving water retention. Empirical research from tropical regions demonstrates that shaded coffee and cocoa systems maintain higher productivity and stability under warming scenarios [25]. Diversified systems thus support multiple ecosystem services—yield resilience, soil fertility, carbon sequestration, and biodiversity conservation—aligning well with climate-smart agriculture principles.

2.6 Conservation Agriculture: Reduced Tillage and Cover Crops

Conservation agriculture (CA) promotes minimum soil disturbance, permanent soil cover, and crop rotation as guiding principles for sustainable intensification. Reduced or zero tillage minimizes soil carbon losses, enhances infiltration, and reduces erosion, which collectively improve drought resilience. Cover crops and residue retention protect the soil surface and enhance microbial activity. Long-term experiments across Africa, Latin America, and Asia show that CA systems maintain or increase yields over time, especially under moisture-limited conditions. In southern Africa, for instance, conservation agriculture improved maize yields by 15–25% compared with conventional tillage, particularly during dry years [26]. Moreover, CA practices contribute to mitigation through increased soil carbon sequestration and reduced fossil fuel use. However, benefits may vary with soil type, residue availability, and pest pressures, highlighting the need for locally adapted approaches.

2.7 Soil Amendments and Carbon Sequestration Measures

Soil amendments such as compost, manure, and biochar improve soil structure, cation exchange capacity, and water retention, thereby strengthening resilience to climate stress. Biochar, in particular, has received growing attention for its dual role in carbon sequestration and soil productivity enhancement. Meta-analyses indicate that biochar application increases crop yields by an average of 10–20%, depending on feedstock and soil type [12]. Emerging technologies like enhanced rock weathering—application of silicate minerals such as basalt—offer promising co-benefits of soil fertility improvement and atmospheric CO₂ capture. Field trials in the U.S. Corn Belt have shown that basalt dust amendments increased maize and soybean yields by 12–16% while enhancing soil pH and cation exchange capacity [21]. These amendments thus represent a nexus between adaptation and mitigation, improving soil resilience while contributing to long-term carbon storage.

3. Trade-offs, Barriers, and Co-Benefits

While agronomic interventions provide significant opportunities to enhance crop resilience and sustainability under changing climatic conditions, their implementation is often constrained by economic, institutional, and ecological trade-offs. These constraints underscore the importance of context-sensitive, multi-objective approaches in scaling climate-smart agronomy.

Economic and input costs remain among the most persistent barriers. The adoption of improved seeds, precision irrigation, soil amendments, and conservation technologies often demands initial capital investment that many smallholder farmers—especially in low- and middle-income countries (LMICs)—cannot easily afford. For instance, installing drip irrigation systems or purchasing drought-tolerant cultivars may increase short-term costs, even though long-term returns from improved yield stability and water savings are substantial [12]. Additionally, market failures and limited access to credit, insurance, and subsidies frequently hinder adoption. Studies show that without institutional support or incentive structures, adoption rates for resource-efficient technologies rarely exceed 20–30% in smallholder contexts [20]. Therefore, enabling environments through financial incentives, input supply chains, and supportive policy frameworks are critical for overcoming these economic barriers.

Knowledge and extension gaps are equally significant. Many climate-resilient practices—such as conservation agriculture, intercropping, and site-specific nutrient management—require localized knowledge and technical skill. The effectiveness of these practices depends not only on the biophysical environment but also on farmers’ capacity to implement, monitor, and adjust them dynamically. In sub-Saharan Africa and South Asia, studies have shown that when extension services integrate climate information (e.g., seasonal forecasts) with agronomic training, yields and adoption rates improve substantially (Fisher et al., 2018). However, in many regions, extension systems are underfunded, fragmented, or rely on one-size-fits-all recommendations. This knowledge gap results in poor adaptation outcomes and sometimes maladaptation—where interventions that work under one set of conditions (e.g., heavy mulching in humid tropics) may reduce yields or increase pest pressure elsewhere (Lobell et al., 2019).

Context dependence further complicates scaling. Agronomic practices interact with soil properties, climatic zones, topography, and institutional arrangements in complex ways. For example, conservation tillage improves soil moisture and yield stability in semi-arid regions but can suppress early crop growth or increase weed competition in wetter climates (Corbeels et al., 2014). Similarly, the success of agroforestry systems depends on species compatibility, shade levels, and local land tenure structures. Therefore, climate-smart agronomy must be locally adaptive rather than universally prescriptive. Spatially explicit modelling and participatory field trials can help identify the most effective interventions for particular agroecological zones (Challinor et al., 2021).

Trade-offs between yield optimization and mitigation objectives are also evident. Some practices designed to reduce greenhouse gas (GHG) emissions or enhance soil carbon—such as reduced tillage or organic nutrient inputs—may initially lower yields or increase labor requirements. Conversely, intensification strategies that maximize yields (e.g., high fertilizer inputs) can elevate emissions and degrade soil health if not balanced with mitigation considerations. A synthesis by Smith et al. (2019) found that most agronomic practices provide modest mitigation benefits (0.2–0.8 Mg CO₂-eq ha⁻¹ yr⁻¹) but the strongest co-benefits emerge when multiple interventions—such as optimized nutrient management, residue retention, and water conservation—are combined.

Nevertheless, the co-benefits of agronomic interventions often outweigh short-term costs when evaluated through a systems perspective. Practices such as crop diversification, agroforestry, and conservation agriculture not only stabilize yields but also enhance soil health, biodiversity, and ecosystem services. Improved soil organic matter increases water retention, nutrient cycling, and microbial activity, thereby improving resilience to drought and heat stress. Moreover, carbon sequestration in soils and perennial biomass contributes to climate mitigation. These multifunctional benefits, though frequently under-reported in conventional yield analyses, are central to achieving long-term sustainability and resilience goals (Pretty et al., 2020). Integrating these ecological and social co-benefits into national adaptation and mitigation frameworks could improve adoption rates and promote equitable transitions toward sustainable food systems.

4. Evidence from Recent Systematic Reviews and Case Studies

Recent meta-analyses and systematic reviews provide growing empirical evidence for the role of agronomic interventions in mitigating climate impacts on crop production, while highlighting critical knowledge and methodological gaps. However, most studies still focus narrowly on yield or adaptation metrics, with limited consideration of broader mitigation and sustainability dimensions.

A systematic review of agronomic adaptation in Mediterranean-type climates revealed that while the majority of studies emphasize adaptation outcomes—such as maintaining yield under water scarcity—very few examine greenhouse gas mitigation or long-term sustainability impacts. Out of 158 studies reviewed, only one jointly assessed adaptation, mitigation, and productivity outcomes (Frontiers in Environmental Science, 2021). This finding underscores the need for integrated metrics and experimental designs that simultaneously capture yield, emissions, and resilience indicators. Furthermore, the review found that interventions such as conservation tillage, precision irrigation, and diversified cropping consistently improved water use efficiency and yield stability by 10–25%, though mitigation effects were inconsistently quantified due to methodological variability.

Empirical research in smallholder agroecosystems across Africa, Asia, and Latin America provides strong evidence for the effectiveness of agroecological interventions. Practices such as legume intercropping, organic nutrient management, and integrated pest management (IPM) have shown to enhance adaptive capacity, maintain soil fertility, and stabilize yields under increasing climatic stress (Altieri & Nicholls, 2020). For example, smallholder maize–bean intercropping systems in East Africa achieved 30–40% higher productivity per unit area (measured by land equivalent ratio) and improved nitrogen use efficiency relative to monocultures (Kassie et al., 2019). Similarly, integrated soil fertility management combining organic manure with mineral fertilizer improved yields by 15–20% while enhancing soil organic carbon and microbial biomass (Vanlauwe et al., 2014). These findings highlight that resource-conserving practices can simultaneously contribute to food security, climate adaptation, and environmental sustainability.

The demonstrate the role of conservation agriculture and soil health management in long-term resilience. In India’s Indo-Gangetic Plains, a 10-year study found that zero-tillage combined with residue retention and crop diversification increased wheat and rice yields by 8–15% while reducing irrigation requirements by up to 25% (Jat et al., 2019). In the Sahel, contour bunding and mulching improved millet yields by 30% under erratic rainfall, while also reducing runoff and soil erosion [12]. Similarly, integrated water–nutrient management practices in China’s Loess Plateau enhanced water use efficiency by 35% and increased maize yields under drought stress (Li et al., 2018). These results confirm that agronomic interventions can deliver sustained productivity and resilience benefits when adapted to local conditions and supported by enabling institutions, these positive outcomes, evidence synthesis also points to significant gaps. Few studies examine the socio-economic dimensions of adoption—such as labor requirements, gender impacts, and farmer decision-making. Moreover, most research remains short-term and site-specific, limiting understanding of cumulative or landscape-level effects. Systematic evaluations using long-term field data, coupled with life cycle assessment and socio-economic modelling, are essential for quantifying trade-offs and scaling strategies effectively, the literature demonstrates that agronomic interventions are both scientifically robust and practically relevant for building climate-resilient food systems. Yet, realizing their full potential requires moving beyond isolated experiments toward integrated, multi-objective research frameworks that align agronomy, ecology, and socio-economics under climate-smart agriculture paradigms.

7. Conclusion

Agronomic interventions represent a cornerstone of climate-smart agriculture, providing practical, science-based approaches to sustain crop productivity amid rising climatic variability. A growing body of evidence demonstrates that integrating multiple practices—such as deploying drought- and heat-tolerant cultivars, optimizing irrigation and fertilization, adopting conservation tillage, and diversifying cropping systems—can substantially reduce climate-induced yield losses and enhance resource-use efficiency. When strategically aligned with local environmental and socio-economic conditions, these interventions not only safeguard yields but also contribute to long-term soil health, water conservation, and carbon sequestration, the effectiveness of these measures depends heavily on context-specific adaptation, farmer capacity, and institutional support. Barriers such as limited access to capital, weak extension services, and inadequate policy frameworks continue to constrain widespread adoption. Therefore, future strategies must integrate agronomic innovations within holistic climate-smart frameworks that combine scientific evidence, participatory research, and enabling policies. Investments in farmer education, data-driven decision tools, and sustainable input systems will be critical for scaling these solutions. Ultimately, agronomic interventions, when effectively implemented and supported, hold the potential to build resilient, productive, and low-emission agricultural systems capable of securing global food supplies under a changing climate.

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