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Article type: Cover
1934 Volume 8 Issue 2 Pages
Cover1-
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Article type: Appendix
1934 Volume 8 Issue 2 Pages
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Article type: Index
1934 Volume 8 Issue 2 Pages
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Article type: Appendix
1934 Volume 8 Issue 2 Pages
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Tetugoro WAKIMIZU
Article type: Article
1934 Volume 8 Issue 2 Pages
135-139
Published: June 15, 1934
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The occurrence of iron-concretions in the soil of South Manchuria was first observed in 1922 by Mr. Kazue TUKUNAGA, the agrogeologist of the Koshurei Experiment Station of South Manchurian Railway Co. He found them on the surface of the farm in the environs of Koshurei after severe wind, and owed their origin to the rolling action of the silt by winds. When I went to Manchuria in 1924,I also found the aboundant occurrence of iron-concretions in the weathering soil (terra rosa) of Cambrian limestone in the peneplain near Shusuisi, the junction point of Hoten and Ryojun lines of the South Manchurian Railway. The form of concretions is usually globular with the diameter varying between 2 mm. and 8 mm. The surface of concretions is brown-coloured and usually smooth with semi-metallic lustre. They are always found in the B horizon of the soil in situ, as it is usually the case. As it is already suggested by Peter TREITZ, it is sure that they owe their origin to the precipitation of iron by tannic acid derived from the root of oak tree of the genus Quercus. In the great plain of Manchuria, in fact, two kinds of oak (Quercus dentata Thunb. and Quercus mongolica Fisch.) occupy the greater part of broad-leaved forest, and ferruginous concretions are everywhere found in the forest soil now or ever crowned by the above mentioned oak trees. The result of analysis of iron-concretions collected in Shusuisi is as follows : [table]
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Masao HARADA
Article type: Article
1934 Volume 8 Issue 2 Pages
140-152
Published: June 15, 1934
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Various samples of river waters representing various geological formation in their sources in Kwanto district were taken, and their silicic acid contents were estimated by the Isaacs method, modified slightly ; found that the river waters, same in the geological formation of river source, were nearly similar in regard to the silicic acid content. The following approximate data were obtained : [table]
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Takeo IRIKAWA
Article type: Article
1934 Volume 8 Issue 2 Pages
153-166
Published: June 15, 1934
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226 soil samples in all, from 113 different representative tobacco producing districts, namely Tokyo, Mito, Nagoya, Hirosima and Sakaide were collected and their soil classes were determined together with the acidity and humus contents. Further the quality and quantity of tobacco discussed in relative to the soil class.
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Sigeru OSUGI, Naohisa NISIGAKI
Article type: Article
1934 Volume 8 Issue 2 Pages
167-178
Published: June 15, 1934
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An applicability of Teorell's method (Biochem. Ztschr., 248 : 246,1932), a micro-analytical method for ammonia in blood to the soil extract was tested first, and the formation of ammonia in the paddy-field soil was followed up by using the said method, and found as follows : (1) NaBrO and HBr reagents should not be older than a week but their use immediately after their preparation should be avoided ; (2) the method is applicable to determine ammonia in (NH_4) SO_4,NH_4Cl, NH_4NO_3 solution ; (3) best quantity of sample to be used is 0.5-5.0 cc., judging from the experimental error ; (4) within pH 3.0-8.0 range, the method can be used ; (5) for the solution containing Ca, K, Mg, Fe, SO_4,PO_4 and NO_3 ions, the soil water extract and putrefied solution of manures, the method is applicable ; (6) by using the method, the change of NH_3-N of ammonium sulfate, fish cake, soy-bean cake, fresh and ripened compost straw in the soil, was determined for thirteen weeks and found : (a) a large quantity of NH_3-N was found at an early period in all cases and decreases rapidly with the time, and after six weeks it becomes Practically constant viz. 1-2 mg. NH_3-N ; (b) the presence of various organic matter has no marked influence on the NH_3-N of ammonium sulfate, and the decompositin of soybean cake and fish cake is rather slow.
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Arao ITANO, Akira MATUURA
Article type: Article
1934 Volume 8 Issue 2 Pages
179-194
Published: June 15, 1934
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Sixty kinds of inorganic fertilizers on the market were investigated as to the inter-relation of their physical properties, namely osmotic pressure, electric conductivity, specific gravity, surface tension, viscosity and pH value, and chemical composition ; and found (1.) the nitrogenous and potash fertilizers resemble closely each other in their physical properties while phosphorous fersilizers in general are different smaller in their osmotic pressure, electric conductivity and pH values, slightly less specific gravity and surface tension but larger viscosity : (2.) the mixed fertilizers have approximately the mean value of these fertilizers : (3.) the calcic fertilizers are different from the others, having smaller osmotic pressure and electric conductivity and larger pH value : (4.) the chlorous fertilizers have larger osmotic pressure and electric conductivity than sulfurous kinds : (5.) among the nitrogenous fertilizers, Chili saltpeter and calcium Cyanamide are similar to the sulfurous fertilizers except their basicity : (6.) the superphosphorous fertilizers differ in their physical properties by the amount of their phosphorous content : (7.) the potash fertilizers both chlorous and sulfurous behaves as stated in (4.) respectively : (8.) the calcic fertilizers differ greatly by the form of calcium since their solubility is different. From these results obtained in this investigatlon, it is suggestive that the physical properties as well as the chemical composition of fertilizer may have some significance in connection with their manuring value.
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Seiya AYI
Article type: Article
1934 Volume 8 Issue 2 Pages
195-199
Published: June 15, 1934
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A large portion of P_2O_5 in Superphosphate which is applied at the sowing time, is stored in the soil till the barley begines to grow vigorously in the Spring, and meantime the moisture contents of the soil containing superphosphate vary according to the amounts of rainfall. Consequently the pot experiments were carried out to asertain how the length of the storage period and the variation of the moisture contents of the soil effect the manurial value of the superphosphate applied to the soil. The following results were obtained : 1. The manurial value of superphosphate, applied to the soil, decreases after the elapse of some time. 2. The manurial value of superphosphate, mixed with the soil, decreases when the mixture is dried more than a certain degree. 3. The manurial value of superphosphate, once decreased by drying, cannot be restored by the readjustment of moisture content of the soil. 4. Drying of the soil previous to the application of superphosphate within the range of this experiments, has no effect on the manurial value of superphosphate which was applied later.
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[in Japanese]
Article type: Article
1934 Volume 8 Issue 2 Pages
200-207
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[in Japanese]
Article type: Article
1934 Volume 8 Issue 2 Pages
208-217
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[in Japanese]
Article type: Article
1934 Volume 8 Issue 2 Pages
217-219
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[in Japanese]
Article type: Article
1934 Volume 8 Issue 2 Pages
220-221
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Article type: Appendix
1934 Volume 8 Issue 2 Pages
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Article type: Appendix
1934 Volume 8 Issue 2 Pages
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Article type: Appendix
1934 Volume 8 Issue 2 Pages
224-225
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Article type: Appendix
1934 Volume 8 Issue 2 Pages
226-227
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Article type: Appendix
1934 Volume 8 Issue 2 Pages
228-229
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[in Japanese]
Article type: Article
1934 Volume 8 Issue 2 Pages
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[in Japanese]
Article type: Article
1934 Volume 8 Issue 2 Pages
230-231
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[in Japanese]
Article type: Article
1934 Volume 8 Issue 2 Pages
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[in Japanese]
Article type: Article
1934 Volume 8 Issue 2 Pages
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[in Japanese]
Article type: Article
1934 Volume 8 Issue 2 Pages
231-232
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[in Japanese]
Article type: Article
1934 Volume 8 Issue 2 Pages
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[in Japanese]
Article type: Article
1934 Volume 8 Issue 2 Pages
232-233
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Article type: Article
1934 Volume 8 Issue 2 Pages
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[in Japanese]
Article type: Article
1934 Volume 8 Issue 2 Pages
233-234
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Article type: Article
1934 Volume 8 Issue 2 Pages
234-
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Article type: Article
1934 Volume 8 Issue 2 Pages
234-235
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Article type: Article
1934 Volume 8 Issue 2 Pages
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Article type: Article
1934 Volume 8 Issue 2 Pages
235-236
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Article type: Article
1934 Volume 8 Issue 2 Pages
236-
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Article type: Article
1934 Volume 8 Issue 2 Pages
236-237
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Article type: Article
1934 Volume 8 Issue 2 Pages
237-
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Article type: Bibliography
1934 Volume 8 Issue 2 Pages
238-240
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Article type: Appendix
1934 Volume 8 Issue 2 Pages
241-243
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Article type: Article
1934 Volume 8 Issue 2 Pages
243-
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Article type: Appendix
1934 Volume 8 Issue 2 Pages
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Article type: Appendix
1934 Volume 8 Issue 2 Pages
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Article type: Cover
1934 Volume 8 Issue 2 Pages
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Article type: Cover
1934 Volume 8 Issue 2 Pages
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