Abstract
The quality of base absorptive ability of the soil may be, as well as the intensity, an important factor of the soil fertility. In this paper, the author tried to estimate the intensity of base absorption. For this purpose, two soils leached with N (pH 7), N/10 (pH 7,6,5 and 4) ammonium acetate solution and the amounts of NH_4 absorbed were determined respectively. The decrease of NH_4Ac concentrations resulted in both cases in the decrease of NH_4-adsorption capacities. The rate of decrease, however, widely differed, i. e., one soil 7.9% and the other 29%. The larger decrease will mean the easier hydrolysis of the exchangeable bases. The decrease in pH of the N/10 NH_4Ac solutions also brought the decrease of NH_4-adsorption in widely different manner (see fig. 1). The larger decrease means the easier entranse of H ion to the exchange position. These results may prove the different intensity of soil to hold exchangeable bases. The mechanisms of base discussed in this respect.
