Background Assessment of suitable lands for irrigation is indispensable to plan and implement different programs in a cost-effective approach for sustainable land use planning and efficient utilization of the land. Hence selecting proper land use based on land suitability evaluation will enhance the productivity per unit area and ensures the sustainable use of land resources. Therefore, the research was designed to evaluate the suitability of the soil properties of Zamra irrigation scheme for irrigation purposes. Method For this study about 195.16 ha of land were evaluated for irrigation suitablity. Four soil profile pits were opened in the representative site of the scheme based on slope, texture, soil color and soil depth. Soil samples were collected from the soil mapping units for analysis of texture, electrical conductivity, and calcium carbonate content, whereas slope, drainage and soil depth were directly measured at the field. The evaluation was carried out using a parametric evaluation method. Results The results of the study revealed that four types of soils were identified namely, Rehodic Nitisol(eutric), Haplic Regosol (eutric) Eutric Regosol, Leptic Regosol (eutric, loamic), and Vertic Cambisol (Hypereutric). The soil texture consists of sandy loam and sandy clay loam at the surface and subsurface soil and the soil depth of study area varied from shallow to very deep. The soil of the scheme was free from salinity and the status of calcium carbonate was at a low level. The slope of the study area was ranged from flat (0–3%) to slopping (8–15%). Generally, 80.64 ha (41.32%) of the scheme was moderately suitable whereas 71.68 ha (36.73%) of the land was marginally suitable for irrigation. Due to major limiting factors of soil depth and slope about 42.84 ha of the land (21.95%) were not currently suitable for irrigation. Conclusion In the study area, the major limitations were slope and soil depth. Therefore, to increase production and productivity of the scheme, land improvement operations are suggested.

中文翻译：

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埃塞俄比亚阿姆哈拉地区 Wag-Himra 区 Abergelle 区 Zamra 灌溉方案的灌溉适宜性评价

背景 对适合灌溉的土地进行评估对于以具有成本效益的方法规划和实施不同的项目是必不可少的，以实现可持续土地利用规划和土地的有效利用。因此，在土地适宜性评价的基础上合理选择土地利用方式，可以提高单位面积生产力，保证土地资源的可持续利用。因此，本研究旨在评估 Zamra 灌溉计划的土壤特性对灌溉目的的适用性。方法 在这项研究中，大约 195.16 公顷的土地进行了灌溉适宜性评估。根据坡度、质地、土壤颜色和土壤深度，在方案的代表性场地开设了四个土壤剖面坑。从土壤测绘单位收集土壤样品，用于分析质地、电导率、和碳酸钙含量，而坡度、排水和土壤深度是在田间直接测量的。使用参数评价方法进行评价。结果 研究结果表明，确定了四种类型的土壤，即 Rehodic Nitisol（eutric）、Haplic Regosol（eutric）Eutric Regosol、Leptic Regosol（eutric、loamic）和 Vertic Cambisol（Hypereutric）。土壤质地由表层和次表层的砂壤土和砂质粘壤土组成，研究区土壤深度由浅到深不等。方案土壤无盐分，碳酸钙含量低。研究区的坡度从平坦（0-3%）到倾斜（8-15%）不等。一般来说，该方案的 80.64 公顷（41.32%）是中等合适的，而 71.68 公顷（36.32%）是中等合适的。73%) 的土地勉强适合灌溉。由于土壤深度和坡度的主要限制因素，目前约有 42.84 公顷（21.95%）的土地不适合灌溉。结论在研究区，主要限制因素是坡度和土壤深度。因此，为了提高该计划的产量和生产力，建议进行土地改良作业。