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Standards for designing, improving, and maintaining the built environment have conceptual and practical value for health. Yet, their importance runs the risk of being subsumed in tangential discour...

CITY KNOW-HOWHuman health and planetary health are both influenced by city lifestyles, city leadership, and city development. For both, worrying trends are leading to increasing concern. It is imperative that both become core foci in urban policy. Changing the trajectory will require concerted action. The journal Cities & Health journal is dedicated to supporting the flow of knowledge, in all directions to help make this happen. We want to support communication between researchers, practitioners, policy-makers, communities and decision-makers in cities. This is the purpose of this City Know-how section of the journal. ‘Research for city practice’ disseminates lessons from research, explaining the key messages for city leaders, communities and the professions involved in city policy and practice. ‘City shorts’ provide glimpses of what is being attempted or achieved. ‘Case studies’ are where you will find evaluations of interventions and ‘Commentary and debate’ helps extend the conversations we are having a...

Complexity is the hallmark of our habitats, our livelihoods and our health. These objects of analysis, understanding and intervention extend from our homes to our streets and neighbourhoods...

Measuring and mapping apparent soil electrical conductivity (ECa) is a potentially useful tool for delineating soil variability. The “Old Rotation,” the world's oldest continuous cotton (Gossypium hirsutum L.) experiment (ca. 1896), provides a valuable resource for evaluating soil spatial variability. The objectives of this study were to determine the relationship between soil chemical and physical properties and ECa in the Old Rotation, to determine spatial differences in these properties, and to relate differences in these properties to long‐term management effects. Soils at the site classified as fine, kaolinitic, thermic Typic Kanhapludults. Soil ECa was measured at 0–30‐ and 0–90‐cm depths (ECa‐30 and ECa‐90) using a Veris® 3100 direct contact sensor with georeferencing. Soils were grid sampled (288 points) at close intervals (1.5×3.0 m) for chemical properties and grid sampled (65 cells, 7.5×6.9 m) for soil texture. Soil organic carbon (SOC) and total nitrogen (N), extractable phosphorus (P...