The study has evaluated the influence of some forest types on soil properties during the period of 2011 May 2013 at Vay Nua commune, Da Bac district, Hoa Binh province. The proportion of effective water kept by residue fluctuates from 187.81 percent (savanna) to 320.72 percent (rich forest), 236.35 percent on average or being 2.36 times of its dry weight This figure alters between 4.32 and 22.59 m3/ha, its average value being 11.04 m3/ha being equivalent to a rain fall of 0.432 - 2.26 mm. Soil porosity grows about 12,3 - 14,8 percent (natural forest), 6.98 percent (Dendrocalamus membranaceus Munro) and 2,26 percent in savanna and shrub forest Soil humidity changes from 0.05 percent to 0.25 percent. pH changes insignificantly. The amount of organic matter increase approximately by 1 percent (in rich forest) and 0.03 percent in shrub forest but a decrease of 0.02 percent is seen in savanna. Effective nitrogen in savanna falls about 0.39 mg/100 g soil
yet an increasing tendency is shown in rich forest (1.65 mg/100 g soil), medium forest (1.11 mg/100 g soil), Dendrocalamus memb.ranaceus Munro (0.14 mg/100 g soil). The amount of P2O5 is highest in rich forest (0.41 mg/100 g soil), followed by medium forest (0.24 mg/100 g soil) and savanna (0.07 mg/100 g soil). Amount of K2O increase 'most in medium forest with 2.22 mg/100 g soil, and 2.1 mg/100 g soil in poor forest, 1.71 mg/100 g soil in rich forest in turns
the lowest increase is seen in savanna and Dendrocalamus membranaceus Munro with 0.05 mg/100 g soil. The study has made clarify the influences of the vegetation on soil environment, which has the biggest effects on productivity, yield and life of local people.