Abstract
Acid-neutralizing capacity was measured by the batch technique on fifteen kinds of soil type collected in Sendai City in order to investigate the damage against plants by acid rain. Measurement items are pH, EC and acid-neutralizing capacity of the soils. The acid-neutralizing capacity is defined as H+volume being consumed by 100g of soil until pH of soil pore water decreases as low as 4.7. Also the composition of water soluble cations of soil was compared each other by“similarity (of patterns) ”.
The pH (H2O) of 15 soil types ranged from 4.5 to 7.5. The similarity of cation was close for lower layer of all soil types except for one soil type (article soil) . The ANC of each soil ranged from 0.1 to 33.9 (meq/100g), and the average was 13.2 (meq/100g) . Also, the range of upper layers' ANC was 1.2 to 29.5 (meq/100g) with an average 14.3 (meq/100g) . Soil type that showed the lowest ANC was sand hill immature soil collected at‘Fukanuma (sand beach) ’, and the highest ANC soil type was the ash yellow soil collected at‘Imozawa Kita’.
