Knowledge of the spatial variability of compaction would minimize the movement of soil and optimize the operation and economic viability of sugarcane activities. The present study aimed to evaluate different protocols for soil loosening, using subsoiling at fixed and varying depths. The following four protocols were assessed: (i) total area subsoiling with a 7-shank sub-soiler at a fixed depth of 0.4 m in both row and inter-row zones; (ii) total area subsoiling with a 7-shank sub-soiler at varying depths in both row and inter-row zones; (iii) localized subsoiling with a 4-shank sub-soiler at a fixed depth of 0.4 m in a row; and (iv) localized subsoiling with a 4-shank sub-soiler at varying depths in a row. Soil resistance to penetration was measured at 111 sites within a 10 ha area, at a depth of 0.4 m. Data were subjected to descriptive and geostatistical analyses. Localized subsoiling at varying depths had an operational capacity 61.7% greater than the total area operation at a fixed depth. Moreover, along with producing a savings of 57.1% for diesel oil, the emission of equivalent CO2 was reduced by approximately the same amount. Mapping based on site-specific management presented good sustainability indicators, such as reduced energy consumption and lower CO2 emission.

中文翻译：

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在甘蔗下固定和不同深度处对oxisol进行深松处理

了解压实的空间变异性将最大限度地减少土壤的移动并优化甘蔗活动的运营和经济可行性。本研究旨在评估不同的土壤松散方案，在固定和不同深度使用深松。评估了以下四种方案： (i) 使用 7 柄深松机在行和行间区域以 0.4 m 的固定深度进行总面积深松；(ii) 使用 7 柄深松机在行和行间区域进行不同深度的总面积深松；(iii) 使用 4 柄深松机在 0.4 m 的固定深度连续进行局部深松；(iv) 使用 4 柄深松机在不同深度连续进行局部深松。土壤渗透阻力在 10 公顷区域内的 111 个地点测量，深度为 0.4 m。数据经过描述性和地质统计分析。不同深度的局部深松作业能力比固定深度的总面积作业高 61.7%。此外，在节省 57.1% 的柴油的同时，当量 CO2 的排放量也减少了大约相同的数量。基于特定地点管理的地图显示了良好的可持续性指标，例如减少能源消耗和减少二氧化碳排放。