Persistence of subsoil compaction in construction right-of-way (ROW) areas is a major cropland concern following installation of underground pipelines. Soil physical disturbance and remediation practices including removal of topsoil, subsoil tillage and replacement of topsoil were investigated in a soybean–corn rotation field, which was located within a pipeline ROW. The objectives of the study were to investigate the effectiveness of subsoil tillage (300 and 450 mm) applied shortly after the pipeline installation used to help restore soil physical properties and to recover crop yields. Soil bulk density, soil cone index and crop yields (soybean and corn) from three ROW trafficked zones (Z1, Z2 and Z3) and adjacent unaffected zones were compared at one year and two years after pipeline installation. Compared to 300 mm of subsoil tillage in the ROW zones, 450 mm of subsoil tillage did not significantly improve the soil bulk density and crop (soybean and corn) yields. Compared to 300 mm of subsoil tillage, 450 mm of subsoil tillage created significantly lower soil cone index values within the treated soil layer. Compared to yield data from the adjacent unaffected zones, the ROW zones (Z1, Z2 and Z3) had statistically significant (p < .05) crop yield declines of 25% in soybean (2017) and 15% in corn (2018). The near-term soil physical properties and crop yield have been improved from the subsoil tillage applied in the affected zones; however, their recovery to normal conditions as in the unaffected areas has not been achieved within the 2-year period.

中文翻译：

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管道施工期间底土耕作对路权近期土壤物理性质和作物产量的影响

在安装地下管道后，施工权 (ROW) 地区持续存在的底土压实是农田的主要问题。在位于管道 ROW 内的大豆 - 玉米轮作田中，研究了土壤物理干扰和修复实践，包括去除表土、底土耕作和更换表土。该研究的目的是调查在管道安装后不久进行的底土耕作（300 和 450 毫米）的有效性，用于帮助恢复土壤物理特性和恢复作物产量。在管道安装一年和两年后，比较了三个 ROW 交通区域（Z1、Z2 和 Z3）和相邻未受影响区域的土壤容重、土壤锥体指数和作物产量（大豆和玉米）。与 ROW 区 300 毫米的底土耕作相比，450 毫米的底土耕作没有显着提高土壤容重和作物（大豆和玉米）产量。与 300 毫米的底土耕作相比，450 毫米的底土耕作在处理后的土壤层内产生显着较低的土壤锥指数值。与相邻未受影响区域的产量数据相比，ROW 区域（Z1、Z2 和 Z3）具有统计学意义（p  < .05) 大豆（2017 年）作物产量下降 25%，玉米（2018 年）下降 15%。受影响地区进行了深耕，近期土壤物理性质和作物产量得到改善；然而，在 2 年内还没有恢复到未受影响地区的正常状况。