It was shown that the organic content, the specificweightofsoil particle and the liquid limit decreased but the plastic limit increased with the increase of the concentration of acid.
试验表明：酸浓度的增加导致有机含量减小，土粒比重减小，塑限增大、液限减小；
2
Soil organic matter, soil porosity, availible N, Zn, Fe, Mn and enzyme are all positively related to the amount of straw applied remarkably, while soilspecificweight is negatively correlative.