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Article type: Cover
1937 Volume 11 Issue 6 Pages
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Published: December 10, 1937
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Article type: Appendix
1937 Volume 11 Issue 6 Pages
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Article type: Index
1937 Volume 11 Issue 6 Pages
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Article type: Appendix
1937 Volume 11 Issue 6 Pages
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K KAWAMURA, M MIYOSHI, T TSUCHIDA
Article type: Article
1937 Volume 11 Issue 6 Pages
525-534
Published: December 10, 1937
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(1) Seven soil colloids rich in phosphoric acid, were treated with 100cc per one gram of dry colloid, of half normal solutions of Cl, SO_4,acetate, lactate, malate and citrate ions which were given in the form of potassium salt or the potassium salt plus the free acid, the latter being employed together with KOH for the pH regulation of the salt solutions. With the filtrates thus obtained, the amounts of phosphoric acid liberated, were colorimetrically determined. The pH values of the filtrates were also estimated. (2) The results indicated that the phosphoric acid liberation was lowest in amount at or near the point of pH7. In both sides of the neutral point, it ascended with fall and rise in pH. (3) Organic anions, especially oxyacid anions were found to have much greater power for the exchange-liberation than have inorganic anions. The liberation power of anion, whichever it may be organic or inorganic, seemed to increase with increase in valency. So far as the six anions concern, their liberation powers were found to be in the following order. citrate>malate>lactate>acetate>SO_4>Cl
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[in Japanese]
Article type: Article
1937 Volume 11 Issue 6 Pages
535-538
Published: December 10, 1937
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Hajime ISHIBASHI
Article type: Article
1937 Volume 11 Issue 6 Pages
539-549
Published: December 10, 1937
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In a series of pots of following dimentions, with following depthes of soil, fertilizer and silica supply, rice plants were raised, and the effects of silica were studied. Dimensions of pots, depths and weights of soil, and fertilizer supplied.[table]The results can be summarized as follows; 1. The yields of grain and straw increased with soil depth. 2. The ratio of fertility, the ratio of the numbers of perfect grains to those of the total grains, and the silica contents in the plants increased and the brown spots on the surface of hulld grains decreased with soil depth. 3. The yields of grain and straw, both from the silica supplied and unsupplied pots, inercased with soil depth, but for the same depth of soil the yield of grains from the former was greater than that from the latter. 4. As the result of silica supply, the ratio of fertility, the ratio of the numbers of perfect grains to those of the total grains, and the silica contents in the plants, greatly increased, and the brown spots on the surface of hulld grains decreased. 5. Above effects of silica on the growth of rice plants decreased with soil depth. The yield and its increment due to silica supply were as follows. Effect of silica supply on the crop yield of rice plant.[table]
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[in Japanese]
Article type: Article
1937 Volume 11 Issue 6 Pages
550-554
Published: December 10, 1937
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Goro MATSUKI, Shinichi KATSUTANI
Article type: Article
1937 Volume 11 Issue 6 Pages
555-564
Published: December 10, 1937
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An investigation was made to study the variation in the power of absorbing nutrients with several kinds of crop plant on the same field, and it was found that rice plant absorbs more nutrients than barley, and garden radish absorbs more nutrients than the eggplant and rape. The amount of absorbed nutrients was tabulated as follows.[table]
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Satiyo ARAKAWA
Article type: Article
1937 Volume 11 Issue 6 Pages
565-569
Published: December 10, 1937
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Among the volcanic ash soils in Oita prefecture, there is one kind of soils, which is called as "Kurodoya". The soil of this kind is of light fine clayey texture, rich in humus and classified into siallitic or sub-siallitic groups of brown soil. It has wide carbon-nitrogen ratio, strong absorption capacity toward phosphates and contains, magnesium in a large amount. The soil seems to be at an initial stage of acidification although much bases have not yet been washed away.
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Takashi KOBAYASHI
Article type: Article
1937 Volume 11 Issue 6 Pages
570-576
Published: December 10, 1937
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A study was made on the removing of N, P_2O_5 and K_2O from the rice plant in pot by the leaching of rain. The results of this experiments showed that leached constituents increased their amount with growth of plant, namely, at the period when the plant was still green the leached amount was small or negligible, but at the later period when the plant attained its maturity the amount became larger, percentage of the leached amount to the absorbed of each constituents were as follows : N 5.3%; P_2O_5 13.0%; K_2O 35.8% The most part of leached constituents was observed to be leached from the dead leaves and sheaths and not from the stems.
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Rokuro KAWASHIMA
Article type: Article
1937 Volume 11 Issue 6 Pages
577-584
Published: December 10, 1937
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1) To a highly acidic and red-colored mineral soil of tertiary origin added CaCO_3 in ascending rates of amount and cultivated akamatu and hinoki. 2) The seedling of akmatu grows best on the acid soil of very small content (<0.1%) in exchangeable lime. The exchangeable lime content over 0.2% seemed to be detrimental for the growth of akamatu seedling. 3) The seedling of hinoki grows best on the soil of pH-value 4.8 and 0.16% in exchangeable lime. 4) The author desired to determine the exchangeable lime in accompanying with the reaction of soil.
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[in Japanese]
Article type: Article
1937 Volume 11 Issue 6 Pages
585-594
Published: December 10, 1937
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[in Japanese]
Article type: Article
1937 Volume 11 Issue 6 Pages
595-609
Published: December 10, 1937
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[in Japanese], [in Japanese]
Article type: Article
1937 Volume 11 Issue 6 Pages
610-614
Published: December 10, 1937
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[in Japanese]
Article type: Article
1937 Volume 11 Issue 6 Pages
615-616
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[in Japanese]
Article type: Article
1937 Volume 11 Issue 6 Pages
617-
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[in Japanese]
Article type: Article
1937 Volume 11 Issue 6 Pages
617-
Published: December 10, 1937
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[in Japanese]
Article type: Article
1937 Volume 11 Issue 6 Pages
617-
Published: December 10, 1937
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[in Japanese]
Article type: Article
1937 Volume 11 Issue 6 Pages
617-
Published: December 10, 1937
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[in Japanese]
Article type: Article
1937 Volume 11 Issue 6 Pages
617-618
Published: December 10, 1937
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[in Japanese]
Article type: Article
1937 Volume 11 Issue 6 Pages
618-
Published: December 10, 1937
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[in Japanese]
Article type: Article
1937 Volume 11 Issue 6 Pages
618-
Published: December 10, 1937
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[in Japanese]
Article type: Article
1937 Volume 11 Issue 6 Pages
618-
Published: December 10, 1937
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[in Japanese]
Article type: Article
1937 Volume 11 Issue 6 Pages
618-619
Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
619-
Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
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Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
619-
Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
619-
Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
619-
Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
619-620
Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
620-
Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
620-
Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
620-
Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
620-
Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
620-621
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Article type: Article
1937 Volume 11 Issue 6 Pages
621-
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Article type: Article
1937 Volume 11 Issue 6 Pages
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Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
621-
Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
621-622
Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
622-
Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
622-
Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
622-
Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
622-623
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Article type: Article
1937 Volume 11 Issue 6 Pages
623-
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Article type: Article
1937 Volume 11 Issue 6 Pages
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Article type: Article
1937 Volume 11 Issue 6 Pages
623-
Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
623-624
Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
624-
Published: December 10, 1937
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Article type: Article
1937 Volume 11 Issue 6 Pages
624-
Published: December 10, 1937
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