Original title: Microbiomes of soils and leafy vegetables in urban agriculture systems reflect crop management and local environmental conditions
The researchers sampled soil and leafy greens at seven urban farms near Washington, DC, and identified microbes using DNA sequencing. The mix of microbes differed between sites, with links to irrigation water, crop type, soil conditions, and weather. Many microbes on leaves appeared to come from nearby root-zone soil, while some greens carried microbes linked to possible biological control. Machine-learning models could use bacterial patterns in soil near roots and on leaves to predict the production site.
Imagine packing lunch from vegetables grown in different gardens. The leaves may pick up traces from the soil around their roots, while the garden's water and weather also shape what is there. In this paper, each garden's growing conditions shape its mix of tiny living things, and that mix can help identify where the vegetables were grown.
Urban farms grow food in varied local conditions, and their microbes can affect crop quality and safety before harvest. Understanding how water, soil, crops, and weather shape those microbes may help growers manage farms and may help trace where leafy greens were produced.
The abstract describes seven urban agriculture sites in the greater Washington, DC, area, so it does not establish that the same patterns hold in other regions or farming systems. It reports possible traceability and food-safety applications, but does not show that these methods improve safety or work reliably in real-world food tracking.
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Microbiomes of soils and leafy vegetables in urban agriculture systems reflect crop management and local environmental conditions — Mai‐Rui Gao, Qingyue Zeng, Kevin Lam et al. — Applied and Environmental Microbiology — doi:10.1128/aem.01551-26
Abstract licence: CC BY
Explanation generated by Synthesis from the abstract — it is not the original paper.