Based on field investigation and analysis,the soil minerals compounds and ferric oxide in hilly-gully area of Southern Ningxia were studied,including Shanghuang experimental area and Yunwu mountainous area.The results showed that the contents order of soil bulk mineral elements are SiO_2>Al_2O_3>CaO>Fe_2O_3>K_2O≈MgO>TiO_2>MnO_2.Si,Al and Fe are evenly distributed in soil profile,Ca,Mg and K are not so even which are higher in up layer than suborder layer.It also showed that the soil geneti...
修改评论