FIELD TESTING OF NEW, MORE EFFICIENT LIMING METHOD.

Based on the new soil acidity determination method a new technology has been developed for the amelioration of acid soils. According to this technology the amount of liming material is equal to the amount of H+ in the liquid and solid phase and the H+ deriving from protolityc reactions. The Hungarian liming recommendation system that is based on the hydrolytic acidity gives twice as high lime doses than the new method. In this work the yield and element composition of plants grown on limed and unlimed soils will be compared. These experiments confirm the results of former experiments that the lime amount calculated from the hydrolytic acidity is excessive. This investigation proved that this lime amount decreases the maize yield and element content compared to the half dose of the calculated lime amount. These experiments showed that the present Hungarian liming recommendation system results lime overdose that is unnecessary and partly harmful.