-
Article type: Cover
1994 Volume 38 Issue 2 Pages
Cover1-
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
-
Article type: Cover
1994 Volume 38 Issue 2 Pages
Cover2-
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
-
Article type: Appendix
1994 Volume 38 Issue 2 Pages
App1-
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
-
Y. Horikawa
Article type: Article
1994 Volume 38 Issue 2 Pages
45-
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
-
Kazushige ANDO, Kenji TAMURA, Junzo AZUMA
Article type: Article
1994 Volume 38 Issue 2 Pages
46-54
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
Determination of carbon by ICP spectrometry was applied to humus composition analysis modified by KOBO and OBA's method, and the result of ICP spectrometry was compared with that of KOBO and OBA's method (titration method). There was a high correlations (r=0.909〜0.991) between analytical values for carbon in NaOH-extractable humus, fulvic acid and humic acid by ICP spectrometry and titration method. The numerical values of alkali soluble fraction percentage, PQ and RF obtained by ICP spectrometry and titration method were almost equivalent. Consequentry, ICP spectrometry is utilizable to humus compositon analysis of soils. The concentration of carbon in NaOH-extractable humus was determined by ICP spectrometry, and the absorbances of NaOH-extractable humus at wavelength between 230 and 700 nm were measured. The ratio of the absorbance at wavelength 600 nm to the concentration of carbon (K_<600>/Cmg・L^<-1>) was calculated, and the ratio of the absorbance at wavelength 450 nm to that at wavelength 520 nm was taken as "melanic index". The relationship between K_<600>/Cmg・L^<-1> and melanic index is useful to distinguish the soils containing A type humic acid from the others.
View full abstract
-
Yasuo KITAGAWA, Yoshihito BANDO, Masahiro KIKUSAWA
Article type: Article
1994 Volume 38 Issue 2 Pages
55-67
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
The clay mineral Composition of thirty six paddy soils distributed in Reihoku District, Northeast part of Fukui Prefecture, was discussed quantitatively based on the results of X-ray diffraction method, differential thermal analysis, thermogravimetry and infrared absorption spectrometry. The outline of the results is as follows: Chloreite was dominant in the paddy soils from the south part of Ohno valley, the upper basin of Kuzuryu river. The considerable amount of mica clay minerals also existed in the soil of the valley. These minerals should be transported from Paleozoic or Mesozoic sediments in the upper stream of this river. Amorphous inorganic materials were rich in the foot of Kyogatake volcano, the east part of the valley. Mica clay minerals, chlorite, vermiculite and chlorite-vermiculite intergrade were found frequently in the paddy soils from Sakai plain, the lower basin of Kuzuryu river. A small amount of smectite was also present in there all soils. Mica clay minerals were dominant in the upper basin of Asuwa river. On the other hand, the contents of chlorite-vermiculite intergrade and kaokin minerals were high in the lower basin of this river. The content of mica clay minerals was extremely high in the paddy soils from the upper basin of Hino river, where are influenced strongly with Pareozoic sandstone and shale. Considerrable amount of chloritevermiculite intergrade also found in this basin. Smectite was very rich in the east side of the basin, locally. Kaolin minerals and chlorite-vermiculite intergrade were dominant in the paddy soils from Nyu mountain area. The amount of mica clay minerals was, however, high in a soil of this area.
View full abstract
-
Yasuo KITAGAWA, Yoshihito BANDO, Masahiro KIKUSAWA
Article type: Article
1994 Volume 38 Issue 2 Pages
68-74
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
The clay mineral Composition of ten paddy soils distributed in Reman District, South-west part of Fukui Prefecture, was descussed quantitatively based on the results of X-ray diffraction method, differential thermal analysis, thermogravimetry and infrared absorption spectrometry. The outline of the results is as follows: The content of chlorite-vemiculite intergrade was high in Tsuruga plain and the basin of Mimi river. The soil materials of this area should be brought from Crataceous biotite-granite around there. The ratios of chlorite and mica clay minerals were high in the clay fraction of paddy soils from basin fo Kita reiver, and mica clay minerals were very rich in the upper basin of Minami river. The materials of these soils should be originated in Paleozoic shalstein, shale and chert. Mica clay minerals were dominant in the soils from west area fo this district where Paleozoic sandstone and shale are found, but a soil derived from Mesozoic gabbro or diorite was abundant in chlorite-vermiculte intergrade. It was supposed that mica clay minerals and chlorite are dominant in the soils derived from Paleozoic sedimentary rocks, but chlorite-vermiculite intergrade dominant in the soils from Mesozoic plutonic rocks in Reman district.
View full abstract
-
Sadahiro Toshimasa YAMAMOTO, Nobutatsu SANATANI, Kouji IIMURA
Article type: Article
1994 Volume 38 Issue 2 Pages
75-82
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
Effect of heating at the extraction of humus from the soil with diluted sodium hydroxide (NaOH) solution on the properties of humus extract was investigated, examining the effect of heating of the humus extracts, which were extracted at 30C with 0.5% NsOH from 15 different types of Japanese soil, in boiling water (100℃) for 30 minutes. Heating treatment of the original humus extracts caused a decrease in the total amounts of the humic substances in the extract measured with a bichromate consumption methed by a few percent. The heating caused also a change in the composition of extracts, that is, the humic acid (HA) fraction decreased by 3〜30% (16% on an average), whereas the fulvic acid (FA) fraction increased by 4〜20% (15% on an average). The rate of decrease in A-type HA was lower than that in the other type HAs (B-, P- and Rp-type). Along with the decrease in the amount of HA fraction, the increase in RF (=optical absorbance at 600 nm per 0.1 N KMnO_4 consumption by 30 ml of HA solution) and the decrease in ΔlogK (logK_<400>-logK_<600>, where K is absorbance at 400 or 600 nm) were observed. For A-type HA the increase in RF was prominent while for the other type HAs both the increase in RF and the decrease in ΔlogK were evident. In the absorption spectra of UV-Visible light for HA and FA, the change in optical absorbance by heating was obviously observed at the wavelength less than 400 nm, but not in the visible region. The differential absorption spectra for heated-minus original-HA exhibited a decrease in absorbance at the wavelength less than 400 nm, whereas those for FA exhibted an increase. This means that the non or less-colored component of HA was detouched into FA fraction by heating. As a result, heated HA seem to increase the density of the straucture contribute to the dark color in HA, and then RF rises. According to the FT-IR and ^1H-NMR spectra for HAs, the substance released from HA by heating was considered to be a carbohydrate, such as saccharides.
View full abstract
-
Takeshi TANGE, Hisayoshi YAGI
Article type: Article
1994 Volume 38 Issue 2 Pages
83-86
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
-
Ryunosuke HAMADA, Hiroaki SUMIDA
Article type: Article
1994 Volume 38 Issue 2 Pages
87-89
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
-
Kenji MATSUMORI
Article type: Article
1994 Volume 38 Issue 2 Pages
90-97
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
-
Hiroyuki SHIGA
Article type: Article
1994 Volume 38 Issue 2 Pages
98-105
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
-
Norio YASUDA
Article type: Article
1994 Volume 38 Issue 2 Pages
106-111
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
-
Toshiaki TANIMOTO, Satoshi UEMOTO, Seizaburou NAKAZAWA, Katsumasa MIYA ...
Article type: Article
1994 Volume 38 Issue 2 Pages
112-117
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
-
H. Kubodera
Article type: Article
1994 Volume 38 Issue 2 Pages
118-119
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
-
[in Japanese]
Article type: Article
1994 Volume 38 Issue 2 Pages
120-
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
-
[in Japanese]
Article type: Article
1994 Volume 38 Issue 2 Pages
121-
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
-
[in Japanese]
Article type: Article
1994 Volume 38 Issue 2 Pages
122-
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
-
Article type: Appendix
1994 Volume 38 Issue 2 Pages
123-
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
-
Article type: Appendix
1994 Volume 38 Issue 2 Pages
App2-
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
-
Article type: Appendix
1994 Volume 38 Issue 2 Pages
App3-
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
-
Article type: Cover
1994 Volume 38 Issue 2 Pages
Cover3-
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS
-
Article type: Cover
1994 Volume 38 Issue 2 Pages
Cover4-
Published: December 31, 1994
Released on J-STAGE: June 30, 2018
JOURNAL
FREE ACCESS