Design and Analysis of Agronomic Field Experiments: A Review
Abstract
Field experiments are essential in development of agricultural productivity, sustainability and efficiency of resource use. The soundness of the findings made out of such experiments greatly relies on the strength of the experimental design and the right kind of statistical analysis. This review critically analyses classical and contemporary methods of designing and analysing agronomic field trials, and in doing so, emphasizes issues like spatial heterogeneity, environmental variability and interference of treatments. Conventional designs (such as totally randomized design (CRD), randomized complete block design (RCBD), factorial arrangement, and split-plot design) are considered as well as more sophisticated designs (row-column format design, spatial statistical model design and mixed-model design). The review also discusses the latest innovations, such as the incorporation of precision agriculture tools, geospatial technologies, and machine learning methods into the planning of experiments and data analysis. Although there has been a great improvement, there are still gaps in the use of spatially explicit models, addressing the neighbour effects and standardization of analytical frameworks. The article presents new possibilities in agronomic experimentation to include the use of artificial intelligence and real-time data analytics. In general, the synthesis highlights the necessity of a paradigm shift to more adaptive, data-driven and computationally robust experimental systems to improve the quality, reproducibility and applicability of agronomic research findings.
Full Text
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Introduction
The foundation of agronomic field studies is empirical evidence on how to enhance crop productivity, input efficiency, and sustainability in various agro-ecological settings (Kool et al., 2020) [37] . These trials are necessary to test the varieties of crops, fertilizer management, irrigation, and pest control methods in practice in the field (Tanaka, 2021) [72] . But in contrast to controlled laboratory experiments, the field experiment is subject to spatial and time variability which may cause a great impact on the results of the experiment (Willers et al., 2004) [79] . Agronomic experiment design is the key to eventual validity and accuracy of the findings. Minimization of bias and quantification of experimental error are based on classical principles of experimental design, including randomization, replication, and local control. Randomized complete block design (RCBD) and factorial designs are examples of designs that have been extensively used because they are simple to implement and they can manage the variability in the field (Hoefler et al., 2020) [31] . However, with growing complexity in agricultural systems due to climate variability, soil heterogeneity, and precision farming technologies, more complex and adaptable experimental models are required (Mourtzinis et al., 2021) [55] . Besides design, selection of statistical analysis techniques also has a significant effect on the interpretation of experimental data. Analysis of variance (ANOVA) has been the primary tool of agronomic research, but it does not always have the ability to capture the spatial correlation and random effect in field circumstances (Argaw et al., 2025; Darghan et al., 2024) [6,19] . More recent developments in statistical modeling, such as linear mixed models, spatial methods, and Bayesian methods, provide better abilities to address such complexities (Gamulin et al., 2024) [24] . In spite of these changes, a range of challenges remain, such as the deficiency of the use of the latest analytical tools, insufficient attention to treatment interference, and the standardized reporting practices (Lee, 2023) [43] . Thus, to inform the future research, it is crucial to critically and thoroughly assess both traditional and modern approaches.
Experimental Design principles. Fundamental Principles
Agronomic field experiments are based on three main principles: randomization, replication, and local control to determine their reliability and validity (Tanaka, 2021) [72] . These were first formalized by Ronald A. Fisher and are the focus of experimental research in agriculture. Randomization is a treatment that is randomly distributed among the experimental units so that any treatment has an equal probability of being assigned to any plot. This will reduce selection bias and aid in getting unbiased estimates of treatment effects. Randomization is another reason that the statistical tests can be used as they provide the independence of experimental errors (Berger et al., 2021) [9] .
Replication
It is the repetition of treatments in more than one experimental unit. It enables estimating experimental error and enhances comparisons of treatments. This is especially essential in field experiments, where the natural variability may confound treatment effects (Filazzola & Cahill, 2021) [23] . Experimental error is reduced by local control, often by blocking, to clump similar experimental units together. Agronomic research traditionally involves blocking along established gradients (soil fertility, availability of moisture or topography) (Koutra et al., 2023; Mathews and Crossa, 2022) [39,52] . Local control increases the sensitivity of the experiment by taking into consideration the variability (Mathews and Crossa, 2022) [52] . Although these principles form the basis of knowledge, their implementation in various agricultural environments, particularly on-farm experimentation, poses special issues (Sileshi, 2023) [69] . In particular, due to the inherent variability of fields managed by farmers and logistical constraints, on-farm experiments require a strong experimental design capable of providing statistical validity despite these complications (Cho et al., 2021) [17] . These principles combined constitute the foundation to develop effective and statistically valid experiments. They however, when put into practical use need to be adapted to field specific limitations and research purpose.
Types of Experimental Designs in Agronomy
Various experimental designs are used in agronomic field experiments to answer various research questions in the presence of different degrees of field heterogeneity (Almaraz et al., 2022) [4] . The design selection is a major factor that determines the accuracy, validity, and interpretability of findings. Although classical designs have been in popular use, their weaknesses in the conditions of complex fields have prompted the creation of more sophisticated and versatile designs. Randomized complete block designs and split-plot designs are the most frequently used types of experimental designs in agricultural and biological research and enable the randomization of factors within a multi-factorial experiment (Carvalho et al., 2022) [14] .
Completely Randomized Design (CRD).
The simplest type of experimental design is the Completely Randomized Design (CRD) in which experimental units are randomly assigned treatments. This type of design presupposes that all the experimental units are identical, which is why it is best applicable to controlled settings, e.g. greenhouses or laboratory conditions (Suza & Lamkey, 2023) [71] . Although CRD is simple and easy to apply, it has seldom been employed in field experiments because of its failure to consider the spatial variability (Usman et al., 2024) [75] . The uncontrolled fluctuation in soil fertility, moisture, and microclimate in heterogeneous agricultural fields may result in a higher degree of error in experiments and decrease the sensitivity of treatment comparisons (Sileshi, 2023) [69] .
Key Observation
CRD is frequently used inapplicably in field conditions where the variability is high which results in wrongful conclusions. It is only applicable in a very homogeneous set of conditions or initial experimentations (Carvalho et al., 2022; Usman et al., 2024) [14,75] .
Randomized Complete Block Design (RCBD)
Randomized Complete Block Design (RCBD) is the most popular design in agronomic studies because it is effective in managing field variability. The experimental area in this design is subdivided into blocks, which form a relatively homogeneous unit. Assigning all treatments at random is done in each block (Edmondson, 2020) [21] . Blocking is used to manage variability due to known gradients like soil fertility or slope. The design minimizes experimental error by treating similar conditions in the same block and improves precision (Mathews & Crossa, 2022) [52] . But RCBD cannot be used in situations where the number of treatments is large (large block sizes) when Field variability is complicated and not unidirectional, when there are many sources of heterogeneity.
Critical Insight
RCBD though popular, might lack the ability to equip contemporary agronomic experiments where spatial variability is complicated. The over-reliance of the RCBD without testing field uniformity can lower the efficiency in the experiment.
Latin Square Design (LSD)
Latin Square Design is applied where there is variability on both sides e.g. along rows and columns. Every treatment is used once in a row and column, which allows manipulation of two sources of variation at the same time (Koutra et al., 2023) [39] . The design is more effective compared to RCBD in case there are two gradients (Usman et al., 2024) [75] . Nonetheless, it is very restrictive as treatments should be equal to the number of rows and columns (Trinca & Gilmour, 2024) [74] ; the missing data may have a devastating impact on analysis; layout is complicated in large experiments (Koutra et al., 2023) [39] . This has made it difficult to implement on a large scale in field trials with a large number of treatments because its square dimensions are rigidly enforced (Jha et al., 2025) [32] . Moreover, the naturally complicated nature of controlling various environmental gradients simultaneously in one design tends to eliminate its potential application in real-life agricultural contexts (Cho et al., 2021) [17] .
Critical Insight
Although theoretically powerful, LSD has drawbacks, such as not being able to test for every combination of treatments (Ahmad et al., 2025; Kusumiyati et al., 2023) [1,40] . Factorial Designs Factorial designs are considered designs that are able to examine two or more factors simultaneously and at various levels, which enables the researcher to not only examine the primary effects of each factor, but also the interaction effects (Andrade, 2024; Yamada et al., 2023) [5] . These designs are useful especially in the need to comprehend complex agricultural systems where many factors affect crop performance, which allows a more in-depth evaluation of treatment combinations (Carvalho et al., 2021) [15] . As an example, a factorial design would be quite appropriate in research on the impact of various types of fertilizers and irrigation regimes on the crop yield, as it would help determine whether the effects of a specific type of a particular fertilizer are affected by the irrigation regime(Yamada et al., 2023) [81] . In agronomy, factorial experiments may be used to investigate: Fertilizer × irrigation interactions Variety x planting density interactions.
The key benefit of factorial design is that it allows getting as much information as possible out of one experiment (Sharma and Sharma, 2021) [68] . But the more factors and levels, the more complex and hard to manage the design (Haug et al., 2021) [28] .
Critical Insight
Interaction effects tend to be biologically important in agriculture, but are commonly ignored or misunderstood. The interaction of these factors requires proper design and analysis of factorial experiments so as to capture these interactions.
Split-Plot Design
Split-plot designs are employed when factors need more room as experimental units than others. In this design the main plots are attributed to a single factor. Another factor is added to the subplots of each main plot. This hierarchical design can be used to capture factors that cannot be applied to a small scale, such as tillage or irrigation, and can represent other factors, such as fertilizer rates or crop varieties, on a smaller scale (Salinas-Ruiz et al., 2024) [66] . It is often applied when the factors vary in their ease of application, e.g., irrigation (main plot) and fertilizer (subplot) (Majeed & Abood, 2021) [51] . The design is beneficial in the case of the experiment when various factors require various sizes of plots because of logistical limitations or the treatment application character (Li et al., 2023) [45] . The major advantage of a split-plot design is that it is more accurate in measuring those factors that are difficult to manipulate and also the more detailed treatments can be assessed (Chanda et al., 2021) [16] .
The design is useful and common in field applications, but it brings in other degrees of experimental error: Error of main plot (vaguer) Subplot error (more accurate)
Critical Insight
The most frequent error is the analysis of split-plot designs as simple factorials that result in incorrect conclusions (Carvalho et al., 2022) [14] . To prevent inflated significance, it is necessary to manipulate statistics properly (Carvalho et al., 2022). A comparative summary of commonly used experimental designs is presented in Table 1.
Advanced and Modern Designs
As agricultural systems become more complex, more complex experimental designs are becoming significant (Li et al., 2023; Longis et al., 2024) [45,47] . (a) Row-Column Designs These designs are two-way extensions of blocking and are applicable in very heterogeneous fields. They offer enhanced management of spatial variability as opposed to RCBD. They work especially well in the case of two-way stratification of experimental units needed to counter the influence of environmental gradients (Usman et al., 2024) [75] .
(b) Incomplete Block Designs
In large number of treatments, it is not practical to incorporate all the treatments in each block. Incomplete block designs enable subsets of treatments in blocks, which increases efficiency. This method maximizes the resources allocation by decreasing the block size without compromising the statistical power, especially in experiments with multiple treatment levels (Usman et al., 2024) [75] .
(c) On-Farm and Participatory Designs
Such designs are carried out under actual farming conditions and in most cases they have farmers taking part in such experiments. They increase the practical applicability of research results but create more variability (Toffolini and Jeuffroy, 2022) [73] .
(d) Spatially Optimized Designs
Spatial information (e.g., GPS, GIS) is becoming part of modern experiments to maximize the plot layout and minimize error variance (Song et al., 2022) [70] .
Critical Insight
Advanced designs are more precise and flexible (Kim et al., 2021) [36] yet need more statistical skills and computing software (Song et al., 2022) [70] . They are still not widely adopted in developing regions because of the lack of technical capacity (Ruzzante et al., 2021) [65] . 6. Experiments in Agronomic Fields have difficulties.
Challenges in Agronomic Field Experiments
Agronomic field experiments are complex in nature because of the dynamic and heterogeneous nature of agricultural environment. In contrast to controlled laboratory trials, field trials are subjected to various sources of variability that may affect the accuracy, precision and reproducibility of the results. These challenges are essential to comprehend and tackle to design strong experiments and guarantee sound interpretations (Sileshi, 2023) [69] .
Spatial Variability
Spatial heterogeneity is one of the greatest problems in field experimentation. Farmlands are not usually homogeneous but differ in terms of their fertility, texture and structure, moisture supply, the presence of organic matter (Zhuravleva, 2024) [86] and so on. This variability may result in the differences in crop response that are not related to the tested treatments. It is hard to capture the intricate spatial patterns even with proper blocking (as in RCBD) when the variability is irregular or multidirectional (Jha et al., 2025) [32] .
Critical Insight
The traditional designs presuppose uniformity in blocks and this is not always realistic. Overlooking spatial variability may overinflate the error in the experiment and decline the capacity to identify the actual treatment effects (Mathews and Crossa, 2022; Tanaka, 2021) [52,72] .
Temporal Variability
Temporal fluctuations such as rainfall variability, temperature, seasonal, Unexpected climatic events (Cabot et al., 2023) [12] also affect agronomic experiments. These variables may have a great impact on crop growth and treatment performance especially in the rainfed systems. The change between years usually causes a lack of consistency in the results, and it is challenging to extrapolate the findings (Santosa et al., 2024; Zhao et al., 2025) [67,85] . Critical Insight: The use of single-season experiments can lead to misleading conclusions (Pokovai et al., 2024) [61] . The robustness and external validity of agronomic research requires multi-season and multi-location trials to enhance the research (Jones et al., 2025) [33] .
Treatment Interference (Neighbor Effects)
Treatment interference happens when a treatment has an effect on neighboring plots. It is especially prevalent in field experiments that include fertilizer treatments (nutrient transport), irrigation treatments (seepage of water), density or variety test of plants (competition effects) (Levin et al., 2023) [44] . Neighbor effects do not assume treatment effects are independent and result in biased estimates of treatment effects (Aronow et al., 2022; Kim, 2024) [7,35] . Critical Insight: The vast majority of classical designs do not take into account the influences of interferences, which may lead to an over-or underestimation of the performance of the treatment (Wager & Xu, 2021) [78] . To alleviate this problem, it is necessary to include buffer zones or implement spatial models (Koutra et al., 2023) [39] .
Experimental Error and Uncontrolled Factors
Experimental error is the impact of uncontrolled and unknown sources of variability, such as pest and disease occurrences, Uneven management practices, Measurement errors, Human errors in field operations (DeKold and Robertson, 2023; Mathews and Crossa, 2022) [20,52] . Such aspects lead to residual variability, which might mask treatment differences and diminish statistical power (Mathews & Crossa, 2022) [52] . Important Implication: Replication assists in determining experimental error, but it does not remove it (Vogrin & Koten, 2024) [77] . Such errors should be reduced with better standardization of field work and data collection (Mahmoud et al., 2022; Yang et al., 2023) [50,84] .
Practical and Logistical Constraints Practical limitations used to limit field experiments include
Limited land, Labor, Equipment, Time and budget constraints. These limitations impact the choices of plot size, treatments, and levels of replications. Experimental precision can also be impacted by compromises of logistical reasons in many cases(Jones et al., 2021) [34] . Critical Insight: The statistical rigor can often be at odds with practical feasibility.
Data Complexity and Management Issues
Experiments in modern agronomy are producing more and larger data, with multi-factor experiments, Multi-location trials, Continuous data collected with sensors (Newman & Furbank, 2021) [58] all becoming increasingly common. Analysis and management of such datasets demand high statistical and computing capabilities, which are not always available to researchers (Brown et al., 2020) [11] . Critical Insight: The disparity between the production of data and its analysis is increasing (Arribas-Bel et al., 2021; Gillespie et al., 2024) [8,26] . In the absence of data management and analysis, information of value might be underutilized (Ezhilaras and Jaswanth, 2024).
Critical Insight
The gap between data generation and analytical capacity is widening (Arribas-Bel et al., 2021; Gillespie et al., 2024) [8,26] . Without proper data management and analysis, valuable information may remain underutilized (Ezhilarasi & Jaswanth, 2024) [22] .
Lack of Standardization and Reproducibility
One of the primary issues in agronomic studies is the absence of standard protocols in the design of experiments, Data analysis, Reporting of results (Hammond et al., 2023) [27] . This creates problems with the comparison of studies and replication of results in different places and circumstances (Sileshi, 2023) [69] . Critical Insight: To increase the credibility and reproducibility of agronomic research, greater transparency and the use of standardized reporting frameworks are needed.
Statistical Analysis Methods in Agronomic Experiments
The correctness and meaning of agronomic field experiments greatly relies on the selection of the right statistical analysis techniques. Since field conditions are variable and complex in nature, statistical tools are important in isolating the effects of treatment and the background noise. The methods of analysis employed by agronomy have over time shifted to simplistic forms of classical analysis to complex and adaptable modeling frameworks (Mowers et al., 2022) [56] .
Classical Methods: Analysis of Variance (ANOVA)
Analysis of variance (ANOVA) has long been the main pillar of statistical analysis of agronomic experiments (Carvalho et al., 2022) [14] . It is a commonly used test to determine the importance of treatment effects by decomposing the overall variability into treatment, block, and experimental error components (Yamamotto et al., 2022) [82] . The approach is specific to research designs like CRD, RCBD, and factorial experiments (Varalakshmi, 2025) [76] . ANOVA is based on a number of assumptions, such as independence of observations, homogeneity of variance, and homogeneity of residual normality (Ledolter et al., 2020) [42] . ANOVA offers a strong framework of hypothesis testing when these assumptions are met. After a significant F-test, various comparison methods, including Least Significant Difference (LSD) or Tukey test, are used to compare treatment means (Ledolter et al., 2020). ANOVA is limited in a few ways, in spite of its popularity. It fails to appropriately represent spatial correlation or more complicated error structures traditionally found in field experiments. Additionally, its assumptions may be violated, which may also result in incorrect inferences, especially in heterogeneous environments (Hawinkel et al., 2022) [29] .Despite its widespread use, ANOVA has notable limitations. It does not adequately account for spatial correlation or complex error structures commonly present in field experiments. Moreover, violations of its assumptions can lead to incorrect inferences, particularly in heterogeneous environments (Hawinkel et al., 2022).
Mean Comparison Procedures
Mean comparison tests are frequently employed to determine certain differences among treatment levels following identification of overall significance with ANOVA. LSD, Multiple Range Test (DMRT) by Duncan and Honest Significant Difference (HSD) by Tukey are common techniques used in agronomic studies (Carvalho et al., 2022) [14] . Although these techniques are applicable in interpreting treatment effects, they are different in their ability to control Type I error rates. As an example, LSD is less conservative and can result in a higher number of false positives, but Tukey test is less liberal and can be used in case of multiple comparisons(Nanda et al., 2021) [57] . The major drawback of these tests is that they rely on the validity of ANOVA assumptions (Bittner, 2022) [10] . Moreover, overinterpreting results may be caused by overreliance on pairwise comparisons in the absence of biological relevance (Lin and Peddada, 2023) [45,46] .
Linear Mixed Models (LMMs)
Linear Mixed Models are one of the major improvements in the agronomic research analysis. LMMs allow both fixed and random effects in comparison with classical ANOVA where all factors are fixed. The latter flexibility comes in handy especially when analyzing data of multi-location and multi-year experiments (Madden & Ojiambo, 2024) [49] . The location, year, and replication are usually taken as random effects in agronomic trials whereas treatments are usually considered as fixed. It will be more effective to estimate the effects of treatment and increase the generalizability of findings ( Yan, 2021) [83] . The LMMs also offer a means of dealing with unbalanced data and missing observations, which are prevalent in field experiments(Hoarau et al., 2021) [30] . Nevertheless, they involve more advanced statistical skills and computation resources to be used (Piepho et al., 2022) [60] .
Spatial Analysis Techniques
One of the primary sources of error in field experiments is spatial variability, which is not properly considered by traditional methods (Tanaka, 2021) [72] . Spatial analysis tools overcome this shortcoming by simulating the relationship between adjacent plots (Hawinkel et al., 2022) [29] . These approaches involve the use of spatial covariance structures in the analysis, which can enable more accurate estimates of the treatment effects. They minimize residual error variance by modifying spatial trends, and maximize the efficiency of experiments (Hoefler et al., 2020) [31] . Spatial models, although with these benefits, are not applied in regular agronomic studies (Roberts et al., 2021) [64] . This is mostly because it is complicated to implement and not all researchers are aware of it (Roberts et al., 2021; Song et al., 2022) [70] .
Bayesian Approaches
The Bayesian statistical techniques provide a different model of data analysis that takes into consideration the prior information and observed data. This method is especially applicable when there is limited data or when it is highly uncertain (Menin, 2024) [53] . To estimate the effects of treatments more flexibly, utilize expert knowledge, and manage complex hierarchical models, Bayesian approaches can be used in agronomic research (Gamulin et al., 2024; Ramsey and Rejesus, 2021) [24,62] . The most important benefit of Bayesian analysis is that it allows to give results probabilistic interpretations that can be more informative than standard p-values. Nonetheless, the method depends on the proper choice of previous distributions and computing skills (Leadbetter et al., 2024) [41] .
Integration of Machine Learning Techniques
Recent developments in computational science have brought with them machine learning methods in agronomic data analysis. These should be able to process large and intricate datasets, including those created by precision agriculture technologies (Rane & Choudhary, 2023) [63] . Predictive modeling of crop performance, pattern recognition in spatial and temporal data, experimental design optimization can be performed with the help of machine learning methods (Mourtzinis et al., 2021; Nykei et al., 2021) [55,59] . These techniques have strong analytical abilities, but they are frequently criticized due to being black-box and having no interpretability. As a consequence, it is necessary to integrate them with the conventional statistical procedures to both guarantee accuracy and transparency (Min et al., 2024) [54] .
Modern Innovations in Agronomic Experimental Design and Analysis
Recent developments in the agricultural research have seen the incorporation of new technologies and methods of analysis into the design and analysis of agronomic field experiments. The innovations will overcome the weaknesses of classical experimental designs, especially in the context of managing spatial variability, large data set and complicated interactions between factors (Alesso et al., 2020) [2] . The introduction of precision agriculture technologies is one of the most influential phenomena because it allows sitespecifically managing crops by using sensors and drones and satellite images. The tools enable the collection of data on soil properties, crop growth, and the environment at high-resolution data. This has led to a possibility of using spatially explicit information in experimental designs to enable researchers to optimise the plot layout and make better treatment comparisons(Alesso et al., 2020) [2] . Geographic information systems (GIS) and global positioning systems (GPS) have also increased the potential to map and study variability in the field. Through the incorporation of geospatial data in the planning of experiments, scientists are able to construct experiments which are more representative of the heterogeneity of the underlying field. This has brought about the creation of spatially optimized designs, which enhance accuracy by matching experimental units with natural field gradients (Alesso et al., 2020) [2] . The other significant innovation is the growing use of sensor-based and real-time data collection systems. The use of technologies like soil moisture sensors, weather stations, and remote sensing platforms, produces constant streams of data, which allows dynamic monitoring of the conditions of an experiment. This change in static to dynamic data collection enables a closer analysis of crop responses in time, enhancing the understanding of the effects of treatments (Kortbein et al., 2026) [38] . Statistically, the combination of cutting-edge computational tools has greatly increased the ability of analysis. More complicated modeling techniques, such as linear mixed models, spatial analysis, and simulation-based ones, are now supported by software platforms. These tools enable the researcher to flexibly and more accurately examine large and unbalanced datasets (Choudhary et al., 2024) [18] . Agronomic research has also been changed further with the emergence of artificial intelligence (AI) and machine learning (ML). These methods are able to detect trends, infer results and make optimal designs of the experiment using massive data. To provide an example, the model of crop behavior in different conditions can be predicted using machine learning algorithms, thus supporting decisionmaking and planning of experiments in new conditions(Mourtzinis et al., 2021) [55] . Also, there is an increasing interest in participatory and onfarm experimental methods, in which farmers play an active role in the design and implementation of experimental methods. These methods make the research findings more practical and foster the implementation of innovations (Alexandre et al., 2023; Campbell et al., 2023) [3,13] . Yet, they also add in more variability, which requires stronger and more flexible analytical frameworks (Sileshi, 2023) [69] . The implementation of modern technologies and techniques is still unequal despite these developments. High cost, technical incompetence, and inadequate access to computational tools are some of the challenges that reduce their adoption in most parts, especially in the developing regions (López et al., 2022) [48] . In summary, contemporary advances are transforming agronomic experimentation through the ability to be more accurate, data-driven, and adaptive in research methods. Nevertheless, their integration to be successful demands technological development, as well as capacity building and methodological standardization.
Conclusion
Field experiments are still a mainstay of agricultural research, as they offer a key understanding of crop behavior, resource regulation, and sustainable production techniques. The success of these experiments is based primarily on the strength of its design and the suitability of statistical analysis.
As discussed in this review, classical experimental designs like CRD, RCBD, factorial, and split-plot designs have been a critical part of advancing agronomic research, but may not be adequate to capture the complexity of contemporary agricultural systems. Issues like spatial heterogeneity, temporal variability and interference in the treatment require more complex and adaptable solutions. Developments of statistical tools such as linear mixed models, spatial analysis tools, and Bayesian models have greatly enhanced the analysis of complex agronomic data. Moreover, the introduction of recent technologies, including precision agriculture tools, geospatial systems, and machine learning, has provided new opportunities to improve the precision and efficiency of the experiment. Nevertheless, there is still an essential gap between the presence of sophisticated approaches to research and their practical implementation in agronomic studies (Gava et al., 2025) [25] . The insufficient technical skills, training, and unified guidelines still remain limiting the proper application of these innovations (Hammond et al., 2023; Xie, 2025) [27,80] .
To find solutions to these problems, the future studies should be directed at creating the unified experimental systems that would unite sound design principles and up-todate analytical instruments. The focus of future research should be on capacity building, interdisciplinary cooperation and creation of user friendly analytical platforms. Also, reproducibility, transparency, and standardization of reporting of the experiment should be more focused in the future research.
To sum up, the future of agronomic field testing is in the change of the traditional, stagnant methods towards dynamic, data-driven solutions taking advantage of the technological progress and computing power. The change is necessary to enhance the quality, relevance, and effectiveness of agricultural research to meet the changing world challenges.
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