GEOGRAPHIC SETTING: Surplus soils are in high elevation valleys and on smooth facet slopes of mountain ridges. The slope gradient ranges from 3 to 45 percent. The soils formed in dense until. The mean annual temperature ranges from 0 to 5 degrees C and the imply annual precipitation ranges from 102 to 152 centimeters. The frost-free season ranges from 30 to ninety days. Elevation ranges from 700 to 1615 meters above imply sea level.

Heavy metals are naturally current in the geologic strata in many locations all over the world. These metals are current as result of a number of processes such as physical, thermal, chemical and biochemical phenomena. Hydrothermal action is a vital phenomenon in forming the minerals containing the metals. Accumulation of metals in a mineral spring is one other mechanism. In sea water, dissolved metals could also be accumulated in sea bed deposits. In Japan, arsenic (As) and lead (Pb) exist at a higher concentration in comparison with the global average. One of the reasons for that is that the islands of Japan are located in the world the place the Eurasian and Pacific Plates connect, and geological activities, including volcanic action, have been energetic. In these environments, some trace components akin to As and Pb could also be accumulated. There are a number of forms of metals current within the geologic strata: (1) metals present in minerals as their fundamental components; (2) metals existing in minerals as their sub-elements; (3) metals adsorbed onto particles contained in rocks, similar to mudstone; (4) metals current in marine deposits; and (5) metals present as a complex with organics. The leaching mechanism may vary from kind to kind.

Cd — 84 to 165 centimeters; mild olive brown (2.5Y 5/4) sandy loam; reasonable thick platy structure; agency; 10 % gravel; dark purple (2.5YR 3/6) and 徳島 税理士 相続税 reddish brown (2.5YR 4/4) coatings on faces of peds and in previous root channels; very thin to thick positive sandy loam and loamy sand lenses; strongly acid.