Revegetation of degraded land can in long-term improve the soil attributes compared to the initial condition. This study aimed to evaluate the efficiency of revegetation with leguminous trees to recover the structural quality of a Typic Hapludult soil. For this purpose, morphometric and size-classes distribution analyzes of soil aggregates were performed on soil samples collected from layers 0–0.10 m and 0.10–0.20 m depth. Three areas revegetated with leguminous trees 17 years earlier (Acacia auriculiformis, Mimosa caesalpiniifolia and Inga ssp.) and two reference areas (forest and pasture) were studied. The soil under leguminous trees showed larger aggregates than the soil under forest and pasture, with overall averages by grouping the former higher than those by grouping the latter around 31.6% for the weighted mean diameter and 47.6% for the geometric mean diameter. Aggregate morphometric variables obtained from image analysis were correlated to each other (such as circularity versus roundness, in all five size classes, with values ranging from R = 0.25^⁎ to R = 0.72^⁎⁎), and also to other soil physical and chemical attributes. As a general rule for all five aggregate size classes studied, both roundness and circularity increased with the increase in the aggregates diameter, the soil densification status, the soil richness in organic matter, the exchangeable cations content and the particle surface electronegativity. The aggregate morphometric variables of the two studied soil layers, analyzed by multivariate statistical tools, led to a consistent distinction between sites, grouping forests and pastures apart from the leguminous tree covers. Thus, it could be concluded that after 17 years of revegetation these leguminous trees changed the soil initially under pasture but in a divergent way in relation to the soil under forest.

与初始条件相比，退化土地的植被恢复可以长期改善土壤特性。这项研究旨在评估用豆科植物恢复植被以恢复典型的Hapludult土壤的结构质量的效率。为此，对从0-0.10 m层和0.10-0.20 m层收集的土壤样品进行了土壤团聚体的形态计量和大小分类分布分析。17年前，三个地区的豆科植物得到了重新植被（相思木，含羞草和印度果树））和两个参考区域（森林和牧场）进行了研究。豆科树下的土壤显示出比森林和牧场下的土壤更大的聚集体，按前者进行分组的总体平均值高于对后者进行分组的总体平均值，加权平均直径为31.6％，几何平均直径为47.6％。从图像分析获得的总体形态计量变量相互关联（例如，在所有五个尺寸类别中的圆度与圆度之间的关系，其值范围为R  = ^0.25⁎至R  = ^0.72⁎⁎），以及其他土壤的理化属性。作为研究的所有五个集料尺寸类别的一般规则，圆度和圆度都随着集料直径，土壤致密化状态，土壤有机质丰富度，可交换阳离子含量和颗粒表面电负性的增加而增加。用多元统计工具分析了这两个研究过的土壤层的总形态形态变量，除豆科树木外，还导致了地点，森林和牧场分组之间的一致区别。因此，可以得出结论，经过17年的植被恢复，这些豆科植物最初在牧场下改变了土壤，但是相对于森林下的土壤却以不同的方式改变了土壤。