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Article type: Cover
1935 Volume 9 Issue 4 Pages
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Article type: Appendix
1935 Volume 9 Issue 4 Pages
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Article type: Article
1935 Volume 9 Issue 4 Pages
i-ii
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Article type: Index
1935 Volume 9 Issue 4 Pages
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Article type: Appendix
1935 Volume 9 Issue 4 Pages
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Isenosuke ONODERA, Hiroshi HASEGAWA
Article type: Article
1935 Volume 9 Issue 4 Pages
357-364
Published: December 10, 1935
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1. The paddy soils (alluvial loam) of cylinder experiment, which were manured with different combinations of sulphates (ammonium sulphate, potassium sulphate), chlorides (ammonium chloride, potassium chloride), sodium phosphate, calcium superphosphate, farmyard manure etc., were found to contain much more of fine and coarse sands and less of clay as compared to that of unmanured soils. But no such definite relation was found to exist in the case of silt. 2. Clay found in soils of chloride plots was in larger proportion than that of sulphate, but silt and fine sand were just the opposite. The amount of fine sand showed no clear relations between both salts. 3. Farmyard manure seems to act to compensate the minute soil particles, which will dissolve away by the use of chloride fertilizer.
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Kenkiti YAMAMOTO
Article type: Article
1935 Volume 9 Issue 4 Pages
365-376
Published: December 10, 1935
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A study was made of the influence of aluminiumsulphate on the growth and quality of the sititoi (stuff of Japanese mat). The results were obtained as follows : On the cultivation of the sititoi the application of aluminiumsulphate have much favarable effect upon its growth, yield and quality. This results are probably due to the increase of the soil acidity because the similar results are obtained by applying sulphuric acid. On the water culture, however, the best growth is observed at pH 6 and yields decrease gradually with the increase of acidity, though the rather normal growth is obtained at pH 4. For this reason, it should be considered that the effect of acidity is not direct but indirect. According to the experiment, in the presence of acidic substances mentioned abobe, the content of ammonium in the soil is higher than in the untreated soil in paddy field. But the percentage, not the total amount, of the nitrogen of the crops under these conditions is not always higher in spite of its deep green colour. This colour change should be responsible for the absorption of iron.
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G. MATSUKI, K. TAKEUCHI
Article type: Article
1935 Volume 9 Issue 4 Pages
377-382
Published: December 10, 1935
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The effect of phosphatic fertilizer on the growth of rce plant was studied by the 34-years continued field experiments in Hiroshima Agri. Exp. St. The results were as follows : Until the 4 th year from the beginning of experiment the yield of rice in the plot with superphosphate was observed to be somewhat greater than that in the plot without superphosphate. Put, on the contrary, since the 5 th year the yield has been always for 30 years greater in the latter plot than in the former. Coasequently it may b considered that the amount of P_2O_5,necessary for maintaining the normal yield of rice in this district, was contained sufficiently in applied compst (150 Kwan per Tan), in applied fish meal (9 Kwan per Tan) and also in natural resources.
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Seiki KODAMA, Kenkiti KIDOKORO, Taro HARADA
Article type: Article
1935 Volume 9 Issue 4 Pages
383-388
Published: December 10, 1935
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In the previous report relating to the fertilizing value of the new compound fertilizers, Mizuhokasei and Mikunikasei, and the effects of nitrification bacteria in soil upon them, we established that the fertilizing value or activity of these new compound fertilizers in soil can be preserved longer than simple mixed fertilizers. It is expected generally that these fertilizers would show their peculiarity in some other experiments, for instance, in the experiment by the method of common pot culture, but their peculiar properties would be observed as magnified in next mentioned conditions. From this point of view, we deviced to wedge a glass stopper cock at the bottom of the WAGNER pot, and the nutrient, changed into soluble movable state, was allowed to flow out by opening this cock. We investigated through analysis the amounts of nitrogen which were leaked out, and discussed the results concerned to the growth of crops. The results are given in the following table. Five stumps of barley were taken in each pot and the added quantities of N, P_2O_5 , K_2O were respectively 0.5g, 1g, 1g. [table] Considering the relation of the leaking period to the yields, shown in the above table, we ascertain that the new compound fertilizers are somewhat superior to the simple mixed fertilizers in the power of preserving their fertilizing value and increasing the yield of the crops.
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Rokuro KAWASHIMA
Article type: Article
1935 Volume 9 Issue 4 Pages
389-410
Published: December 10, 1935
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The soil used for this experiment is a highly unsaturated mineral soil of tertiary origin. To this soil added CaCO_3 in ascending rate of amount and planted in pot several kinds of leguminous green manure crops and green corn. The experiments were carried out in two plot series. The one is a series of seven plots and the other is ten plots. The reaction and lime content of each plots, yield and nitrogen content of harvests are briefly summarized in following tables. A. Seven plots series. 1. Soil reaction and lime content. [table] 2.Yield and nitrogen content, the maximum as 100 [table] B. Ten plots series 1. Soil reaction and lime content. [table] 2. Yield and nitrogen content, the maximum as 100 [table] (1). Genge (Astragalus Sinicus) is by far the wide spread green manure of rice field in Japan. From the above tables one can easily recognise the behavior of these crops for the soil reaction and its lime content.
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Kisaburo SHIBUYA, Takashi TORII
Article type: Article
1935 Volume 9 Issue 4 Pages
411-424
Published: December 10, 1935
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The authors had published a paper concerning antagonistic effects of iron salts on the availability of potash fertilizers. (8) It was known that the soluble potash salts vary their nutritive effect for rice plants by mixing soluble iron salts whose anion is the same kind to the potash salts. Variation of the effect had been attributed to the antagonistic action between cations of these salts. Compounds as well as iron salts are considered to display the antagonism to potash under the similar condition. An investigation, hereupon, using soluble salts of lime and magnesia instead of iron salt, has been carried out in order to determine their antagonistic influence on the effect of soluble potash salts for rice plants. 0.05 N K_2SO_4,0.1 N KCI and 0.01 N-0.05 N KNO_3 solutions were taken as the potash nutrients. Corresponding salt solution of CaO or MgO on the basis of the same anion but in various normalities was added into every kind of the potash solution. The rice plants were sown and grown for 18 days in quartz sand after the Neubauer's method, applying the mixed salt solution with no other nutrient. It is shown in the results that : (1) K : Ca and K : Mg antagonisms are noticeable at the growth of rice plants. (2) Strength of the antagonistic action obviously depends on kind of cations and anions, being in relations of Ca>Mg by the cations and SO_4>CI>NO_3 from viewpoint of the anions combined with these cations. (3) The antagonistic action always shows the largest effect under such condition as dissociation degree of both salts in a solution is equal. (4) The antagonism reveals unfavorable effect when the nutritive potash is present in less than adequate amount, while it displays the contrary effect, reducing the undesirable action of the potash when this element excessively occurs in the medium. (5) The nitrates, however, hardly display the antagonism between cations, since they change the dissociation degree to no appreciable extent by mixing in a solution (From Laboratory of Soils and Fertilizers, Taihoku Imperial University, Taiwan, Japan.)
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[in Japanese]
Article type: Article
1935 Volume 9 Issue 4 Pages
425-434
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Article type: Article
1935 Volume 9 Issue 4 Pages
435-437
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Article type: Article
1935 Volume 9 Issue 4 Pages
438-441
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Article type: Appendix
1935 Volume 9 Issue 4 Pages
442-443
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Article type: Article
1935 Volume 9 Issue 4 Pages
444-
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Article type: Article
1935 Volume 9 Issue 4 Pages
444-445
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Article type: Article
1935 Volume 9 Issue 4 Pages
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Article type: Article
1935 Volume 9 Issue 4 Pages
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Article type: Article
1935 Volume 9 Issue 4 Pages
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Article type: Article
1935 Volume 9 Issue 4 Pages
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Article type: Article
1935 Volume 9 Issue 4 Pages
447-
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Article type: Article
1935 Volume 9 Issue 4 Pages
447-
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Article type: Article
1935 Volume 9 Issue 4 Pages
447-448
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Article type: Article
1935 Volume 9 Issue 4 Pages
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1935 Volume 9 Issue 4 Pages
448-
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Article type: Article
1935 Volume 9 Issue 4 Pages
449-
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Article type: Article
1935 Volume 9 Issue 4 Pages
449-
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Article type: Article
1935 Volume 9 Issue 4 Pages
449-450
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1935 Volume 9 Issue 4 Pages
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1935 Volume 9 Issue 4 Pages
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Article type: Article
1935 Volume 9 Issue 4 Pages
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1935 Volume 9 Issue 4 Pages
450-451
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Article type: Article
1935 Volume 9 Issue 4 Pages
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Article type: Bibliography
1935 Volume 9 Issue 4 Pages
452-454
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Article type: Bibliography
1935 Volume 9 Issue 4 Pages
454-
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Article type: Appendix
1935 Volume 9 Issue 4 Pages
455-456
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1935 Volume 9 Issue 4 Pages
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Article type: Appendix
1935 Volume 9 Issue 4 Pages
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Article type: Cover
1935 Volume 9 Issue 4 Pages
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Article type: Cover
1935 Volume 9 Issue 4 Pages
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