01777naa a2200157 a 450000100080000000500110000800800410001910000180006024500980007826000090017652013130018565000130149865000090151165300140152077300850153418360862017-09-01       1966    bl ---       0--  u    #d1 aHASHIMOTO, Y.  aOn the repressing effect of humates and nitrohumates on phosphorus fixation in soil (Part 3).  c1966  aAfter three kinds of soil were treated with Fe-humate, Al-humate, Ca-humate, Fe-nitrohumate, Al-nltrohumate and Ca-nltrohumate, the repressing effect of those humic substances on phosphorus fixation in soil was studied. Two soils of them had been reported as the material soil used in the previous report, the rest was a calcareous soil being different slightly from the material soil in the previous report. The treatment and determination used were carried out in the same way as those reported in the Part 2. All humates and nitrohumates used could suppress phosphorus fixation in each soil, especially onto the calcareous soil, and the suppression by nltrohumates was slightly stronger than that by humates. There seemed to be a distinct difference between feature of suppression by humates and nitrohumates. The suppression of humates and nitrohumates being combined with di- or trivalent cation was more effective to phosphorus fixation than that with monovalent cation. It Is found that theories on the mechanism of suppression to phosphorus fixation by humic substance can not be applied to the result obtained from this experiment. (Resumo em inglês em Soil Science and Plant Nutrition, v. 12, n. 6, p. 39-43, 1966). http://www.tandfonline.com/doi/pdf/10.1080/00380768.1966.10431965?needAccess=true  aFósforo  aSolo  aFixação  tJournal of the Science of Soil and Manure, Tokyogv. 37, n. 9, p. 476-482, 1966.