County-based estimates of nitrogen and phosphorus content of animal manure in the United States for 1982, 1987, and 1992.
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This data set contains county estimates of nitrogen and phosphorus content of animal wastes produced annually for the years 1982, 1987, and 1992. The estimates are...
本数据集包含1982年、1987年及1992年三个年份的年度产生动物粪便(animal wastes)的氮、磷含量县级估算值。该估算值为……



