1.A new type of soil and water conservation project,i. e. ,platform field grown with fruit trees is presented,its surface is 4~5 m in width,row spacing is about 3~4 m,the scope of stablizing slope of field bund is 35~45°,the general height of field bund is 0.3 m.
2.if the wavelength scope is from 20 to 30 m, the main frequency will decrease to the level of 1.50 Hz, which is accordable to the sensitive frequency of body, the riding comfort will reduce greatly, and the riding index will increase by more than 20%;
