求翻译：土壤容重是土壤的一个基本物理性质，对土壤透水性、透气性、入渗性能、持水性能、溶质迁移特性以及土壤的抗侵蚀能力都有非常大的影响。自然条件下土壤容重由于成土母质、成土过程、气候、生物作用以及耕作的影响是一个高度变异的土壤性质[12]。为了分析森林土壤的入渗及土壤水分再分布规律的差异，研究土壤容重的空间变异性是非常有必要的。是什么意思？

Soil bulk density is a fundamental physical properties of soil, soil permeability, air permeability, infiltration performance, water-holding properties, solute transport characteristics and the ability of soil erosion has a very big impact. Under natural conditions, soil bulk density as soil parent

Soil bearing capacity is one of the fundamental physical properties of soil, the soil permeability, ventilative, into the seepage performance, water features, when a solute migration characteristics as well as the Soil erosion-resistant ability of all have a very big impact. Under natural conditions

The soil bulk specific gravity is a soil basic physical property, to the soil water permeability, the permeability, enters infiltrates the performance, the water retention property can, the solute migration characteristic as well as soil anti-etching power all has the extremely tremendous influence.

Soil bulk density is a fundamental physical properties of soil, soil permeability, permeability and infiltration, water-holding capacity, solute migration characteristics and soil erosion resistance have a very big impact. Under natural conditions of soil bulk density due to Cheng Tumu mass, ustrope

Soil bulk density is a fundamental physical properties of soil, soil permeability, permeability and infiltration, water-holding capacity, solute migration characteristics and soil erosion resistance have a very big impact. Under natural condition soil bulk density due to Cheng Tumu MS, Cheng Tu, cli