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Volume 13, Issue 4
Displaying 1-11 of 11 articles from this issue
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I.Application of correlation coefficientMinoru HASIMOTO1970 Volume 13 Issue 4 Pages 187-190
Published: April 25, 1970
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSThe author applied correlation coefficient as a means of manifesting morphologically the origin of the tea plant.
When correlation coefficient between areas was calculated in the tea plant grown at 15 areas of Chugoku, Kyushu and Okinawa districts in Japan, it could be recognized that each correlaton was almost complete. Then, if the series of correlation coefficient were indicated in curves, all the curves seemed to be identical. From these results it was manifested that each area had the same dominant species, although there might be somewhat small morphological variations in each area.
It will hereafter be necessary to apply correlation coefficient to the morphological comparisons of the wild tea plant grown widely in Asiatic regions.View full abstractDownload PDF (394K) -
Kuninori AKIZUKI1970 Volume 13 Issue 4 Pages 191-194
Published: April 25, 1970
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSThough the lowest temperature of growing of the pineapple is 15°C. In Naze city, which is situated in lat. 28° 22'25″ N, and long. 129° 29'43″ E, south-west 379km of Kagoshima, Japan, it seems that Japan is the north limit for the outdoor-culture of the pineapple, for the temperature in January and February is lower than 15°C. And there is so much rainfall that weeds are apt to grow very easily (a year's rainfall is 3, 033.1 mm) In order to solve these two handicaps, it seems we can urge the growth, and may be able to curtail a term of cultivation, and can control growing of weeds rankness by making underground-temperature raisewith using vinyl film mulching.
And so we did the following experimentation.
1, We can make underground-temperature raise 1.8°C-0.4°C more than no treatment zone with vinyl mulching. Variation of the temperature in winter is more than in summer.
2, We can control weeds rankness by using vinyl-mulching.
3, If we cultivate with using vinyl-mulching, growth of the pine is urged and the time of harvest can make short. Namely, in 1965 we could harvest 65 percent of the pine which was planted on the tenth of October in 1963, but we couldn't harvest anything from the no treatment zone with vinyl-mulching.View full abstractDownload PDF (443K) -
Kazumi MAEDA1970 Volume 13 Issue 4 Pages 195-201
Published: April 25, 1970
Released on J-STAGE: March 19, 2010
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Tomio TAKAHASHI, Kiichi NISHIYAMA1970 Volume 13 Issue 4 Pages 202-205
Published: April 25, 1970
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (445K) -
Kiichi NISHIYAMA, Yoshihiro HAYAMICHI1970 Volume 13 Issue 4 Pages 206-210
Published: April 25, 1970
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (544K) -
Takao UEDA, Goro NISHIKAWA1970 Volume 13 Issue 4 Pages 211-214
Published: April 25, 1970
Released on J-STAGE: March 19, 2010
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Mitsuo IKEDA, Akinori NAKAGAMA1970 Volume 13 Issue 4 Pages 215-219
Published: April 25, 1970
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSTwo experiments were carried out with dwarf grain sorghum (Sorghum vvlgure Pers.), using hybrid seed from U.S.A. in 1968. One of the purposes was to examine the yield abilities and related characters of 12 varieties, and the other was to evaluate the effects of 7 plant densities combined with 3 nitrogen levels on the yield as well as yield component with one variety. The results are as follows.
1. Yield of varieties varied considerably between 70kg/a and 38kg/a.
2. High yielding varieties showed the tendency to have the following characters; thick and short stalk, much joints, broad but short leaf and loose type panicle.
3. Typhoon damaged leaves but caused neither lodging nor shedding of grain.
4. Both dry weather and low temperature retarded initial growth rate, resulting in delay of flower differentiation.
5. Yield per unit area increased with higher plant density and the peak was at 2, 000 plants /10 a in non nitrogen plot, while at 4, 000 plants /10 a in both nitrogen plots, thereafter slowly reduction of yield occured with denser populations.
6. Higher nitrogen level favoured to the grain porduotion as well as numbers of grains per year at any plant density.
7. Length of stalk, ear and recondary rachis-branch were all hardly affected by nitrogen levels but strongly influenced by plant density; in the positive direction on the former, contrary in the negative derection on the latter two.View full abstractDownload PDF (541K) -
[in Japanese], [in Japanese]1970 Volume 13 Issue 4 Pages 220-221
Published: April 25, 1970
Released on J-STAGE: March 19, 2010
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1970 Volume 13 Issue 4 Pages 222-238
Published: April 25, 1970
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (2567K) -
[in Japanese]1970 Volume 13 Issue 4 Pages 239-240
Published: April 25, 1970
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (170K) -
[in Japanese]1970 Volume 13 Issue 4 Pages 241-250
Published: April 25, 1970
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (955K)
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