抄録
This report concerns and describes on the results of the preliminary experiments which have been carried out to research on lasting effects of the subsoil plowing. As the subsoil plowing enables to break up hard pan just below the regular plowing depth, hardness of the soil—topsoil and subsoil—becomes soft, and the specific resistance of plowing may be decreased by 14-25% on the tested field, compared with before treating.
