Subsurface Drains on Agricultural Land in the Conterminous United States, 1992: National Resource Inventory Conservation Practice 606

This data set represents the estimated percentage of the 1-km grid cell that is covered by or subject to the agricultural conservation practice (CP606), Subsurface...本数据集表征1公里网格单元中，被农业保护措施（agricultural conservation practice）CP606（Subsurface...）覆盖或受其约束的面积占比的估算结果。