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资源简介：
将采集的182个土壤样品（0-20 cm）风干，并过筛，常规法、M3法、M3A1法、M3A2法测定土壤有效磷、速效钾、有效铁、锰、铜、锌含量。
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河北农业大学创建时间：
2023-01-19
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