Attributes for NHDPlus version 2.1 catchments and modified routing of upstream watersheds for the conterminous United States: 2012 Percent farm land in conservation program.

This metadata record describes a computed ratio of county acres of farmland reported in agricultural conservation programs to the total acres of farmland reported for...本元数据记录描述了农业保护计划中上报的县域农田面积，与针对……上报的农田总占地面积之间的计算比率。