土壌三相に関する研究(第1報) : 土壌三相の時期的変化

概要

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Seasonal variation of three compositional phases of Diluvial, Alluvial and Peat soils were studied. It was found that the annual variation of these three phases are influenced by the climatic condition of the place where those soils develop. The seasonal variations of the three compositional phases of soils are very different owing to the kinds of soils even though they develop in same region. Clay soil shows the following volume in % : 30% of dry soil, 40% of air and 30% of water in crop growing season, and 40%, 20% and 40%, respectively in winter. Loam shows the following volume in % : 30-40% of dry soil, 40-50% of air and l0-20% of water in crop growing season, and 40%, 30% and 30%, respectively in winter. Monthly variations of these three phases of peat soil are very much greater than those of clay soil and loam. With a gradual rise in temperature, volume of air increases, but in winter, peat soil shows the following volume in % : 30-40% of dry soil, 60-70% of water and none of air.
社団法人日本土壌肥料学会の論文
1956-03-15