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Leaching losses of nitrogen (N) from grazed pasture are driven predominantly by urinary N deposited by cattle. This work aimed to use non-invasive accelerometer-based sensors to capture the timing and duration of urination and defecation events in grazing cattle. To register the back arching motion that accompanies urination and defecation, each cow was fitted with two accelerometer sensors. Experiments took place outdoors under grazing conditions during two seasons—autumn and summer—and captured a total of 160 urination events. Across the majority of these events, the tilt angle was observed to shift within a range of 8 to 22.5 degrees. Using 18 selected features that characterise a cow's back arching, ensemble machine learning classifiers were constructed to recognise urination and defecation. The urination classifier delivered an F1 score of 0.80 (harmonic mean computed from a precision of 0.82 and a sensitivity of 0.78). In contrast, the defecation classifier gave an F1 score of 0.73 (calculated from 408 hours of recordings made between 9 a.m. and 3 p.m. from 19 cows). Predictive models for urination event duration were statistically significant. Still, they underperformed, with low explanatory power, in part because the relationship between the duration of back arching and the duration of urine passage was only moderate (R² values of 0.29 in autumn and 0.47 in summer). The work highlights that non-invasive accelerometer sensing has real promise for capturing individual cows' urination patterns and for generating animal-level information that farm decision support systems (such as those addressing urine-N excretion) and managerial actions (such as selective culling or breeding) could use as input.

Intelligent agricultural systems increasingly combine sensors, artificial intelligence, automation, robotics, remote sensing, decision support, digital platforms, and data infrastructures to support farm management. These systems promise more precise monitoring, faster decisions, and improved resource use. Yet their practical value depends on how they enter the social and ecological realities of farming. A persistent problem in intelligent agriculture is that systems are often evaluated through technical performance, productivity, efficiency, or predictive capability. Such evaluations can understate whether technologies fit farmer judgement, local work routines, ecological variability, and institutional conditions. When these dimensions are treated as secondary, intelligent systems may intensify rather than resolve farm-system tensions. This article develops a theory of the socio-technical farm based on human–technology–ecology alignment. The central argument is that intelligent agricultural systems become effective, responsible, and sustainable only when human actors, technological functions, and ecological processes are mutually coordinated. Alignment is therefore theorised as an active, situated, and adaptive relationship rather than as a static design feature. The theory-building synthesis integrates scholarship on intelligent agriculture, digital farming, socio-technical systems, human-centred design, ecological feedback, farm decision-making, and responsible innovation. It defines core constructs, explains alignment mechanisms, identifies misalignment risks, and specifies boundary conditions. The article positions farms as dynamic systems in which judgement, data, machinery, organisms, soil, weather, markets, and governance interact. The proposed theory contributes a farmer-centred and ecology-aware account of intelligent agriculture. It explains how adaptive feedback, contextual design, interpretability, advisory support, accountable governance, and ecological embeddedness shape whether intelligent systems strengthen or weaken farm performance. The theory redirects evaluation from automation alone toward aligned socio-technical design that supports human agency, technological responsibility, and ecological care.

Sustainable precision agriculture increasingly depends on the convergence of artificial intelligence, robotics, automation, and Internet of Things technologies rather than on isolated digital tools. This integrative review synthesizes how these technology domains interact across sensing, data transmission, analytics, decision support, robotic or automated actuation, and feedback within sustainability-oriented farming systems. The review uses a curated peer-reviewed literature selection and an integrative evidence-charting logic to map technology domains, agricultural applications, integration mechanisms, decision functions, sustainability relevance, and system-level challenges. The AI focus includes machine learning, deep learning, computer vision, predictive analytics, data fusion, and decision-support models used for crop monitoring, yield estimation, input optimization, pest and disease detection, and risk forecasting. The robotics and automation focus covers autonomous field robots, UAVs, smart machinery, task execution, and automated farm operations. The IoT and sensing focus includes wireless sensor networks, distributed monitoring, machinery telemetry, remote sensing, cloud and edge computing, and data platforms. The synthesis shows that technology convergence may support resource-efficient, climate-sensitive, and more responsive farm management, but only when data quality, interoperability, field robustness, explainability, affordability, governance, usability, and farmer or advisor feedback are addressed. The review contributes a system-level framing of sustainable precision agriculture as a socio-technical feedback system in which digital sensing, AI interpretation, automated action, and human decision-making must be jointly designed. Future research should prioritize validated, interoperable, transparent, and farmer-centered integration pathways rather than assuming that more automation or more data automatically improves sustainability outcomes.