Structure of some organic soils and soil mixtures as shown by means of pF moisture studies
1942
Jamison, V.C.
In pore size distribution studies, the volume basis of moisture expression is more useful and gives a better picture of structure than the commonly used dry weight basis. The organic soils studied, though widely different in many properties, all showed the greatest frequency of pores between pF 1.0 and 3.0 with a smaller second maximum between pF 4 and 5. THe greatest change in pF moisture relations of mineral soils when peats are added seems to be in the lower of these two ranges. Some change is effected in the pF 4 to 5 range, with the least noticeable shifts in the intermediate "field moisture" range. The lower part of the pF curves of organic soils studied resemble that of a sand fraction in shape. The low conductivity and wind erosion of peats when still at relatively low tensions can be explained from the nature of their moisture relationships.
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