| http://www.w3.org/ns/prov#value | - Labels must include an environmental hazard section identifying picloram as persistent, that picloram products not be applied two years in a row, that a single use may result in contamination of groundwater particularly in areas where soils are permeable (e.g. sandy soil), the depth to the water table is shallow, slopes are steep, soil is clay or compacted, which increases runoff.
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