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Volume 22 (1960 - 196･･･
- Issue 4 Pages 119-
- Issue 3 Pages 83-
- Issue 2 Pages 37-
- Issue 1 Pages 1-
Volume 22, Issue 3
Displaying 1-10 of 10 articles from this issue
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S. TSUNEMATSU, T. YOSHIDA, K. MATSUI1960 Volume 22 Issue 3 Pages 83-90
Published: December 30, 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSAt Tokotan region in Hokkaido, the field is composed mainly of volcanic soil and has been frozen every year to the extent of about 60cm under the soil surface.
Freezing of the soil has been resulted into the formation of plane structure, the soil errosion and thus the reducing of productive power of the field. It is important thing that the soil should be improved to maintain or recover the productive power of soil at such regions.
In order to make sure the effects of the panb reaking on the improvement of soil condition, we investigated the physical properties of soil before and after the pan-breaking as the preliminary experiments.
Moreover, from the studies on operating method of the pan-breaker, it was found that some parts of the pan-breaker should be improved.View full abstractDownload PDF (1506K) -
1960 Volume 22 Issue 3 Pages 90-90,110
Published: December 30, 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (338K) -
Turning out of the Optical Profilograph and its AccuracyF. SHOJI, Y. YASUDA, O. KITANI1960 Volume 22 Issue 3 Pages 91-94
Published: December 30, 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to improve the accuracy of the Mechanical Profilograph, authors have made the Optical Profilograph which cuts the plow bottom with a plane of light and takes photograph of it.
The Optical Profilograph proved to have following merits: 1) It is more precise in measuring plow shape than the former Mechanical Profilograph. Its measuring error is estimated to be less than 1%. 2) man can easily measure slat moldboard plow with it. 3) making use of it, man can measure 3-dimensional curved line with optical sweeping method.View full abstractDownload PDF (825K) -
Measurements of Draft of Japanese Plow on the FieldU. TETUKA, T. KONAKA1960 Volume 22 Issue 3 Pages 95-98
Published: December 30, 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to study the draft of Japanese plows mounted on small tractors, the authors investigated the shapes of them and measured the horizontal component of the draft on the field.
The mean horizontal component is about 133kg and the specific resistance is about 0.5kg/cm2, both of them being larger than horse drawn Japanese plows.
The increase in the draft of small tractor mounted plows is due to enlargement of the specific resistance and the width of furrow.
It seems that the main cause of increase in specific resistance of small tractor mounted plows is due to the increase of frictional resistance of plow heels.View full abstractDownload PDF (632K) -
On the Shearing Characteristics of Fertilizers in the Revolving Type Shear TestsM. WAKUI1960 Volume 22 Issue 3 Pages 99-102
Published: December 30, 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe shearing characteristics of eight kinds of fertilizers were tested in the revolving type shear machine, the main shearing part of which is the vane or radial teeth type vertical rotor in the center of the cylindrical sampler.
Fertilizers tested showed as same characteristics as when they were tested in the common type of direct shear machine which has a shear box consisting of two parts, the upper frame and lower frame. Consequently, the shearing characteristics of fertilizers obtained from the common mono-plane shearing tests can be applied to three dimensional shearing phenomena, which arise in hoppers of fertilizer distributors.View full abstractDownload PDF (2341K) -
Measurements of Husking ForcesM. SONOMURA, N. KAWAMURA1960 Volume 22 Issue 3 Pages 103-106
Published: December 30, 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn 1st. report, the husking forces of rubber-roll rice huller had been theoretically introduced. In this paper these forces which consisted with two forces, contacting force P between rolls and a paddy and frictional or tangential force F, were measured with using cantilever measuring apparatus and electric strain gages (Fig. 1). The experiment has revealed the following: (1) The forces P and F have been found approximately in good agreement with those calculated in 1st, report [Fig 2(A)]. (2) In case of 100% speed different ratio of rolls, the curves of P and F have some undulating changes in short period of husking [Fig 2 (B)]. (3) F/P are approximately 0.9-0.4 (mean 0.7). (4) Husking action of rubber-rolls to a paddy is affected with the feeding directional pose of a paddy, lengthwise or across. In case where paddy is fed lengthwise, in general, P and F are larger and steadier.View full abstractDownload PDF (982K) -
Theoretical Studies of Raising Corn in ThrowerH. MATUMOTO, H. ONISI, K. KUSAKABE, K. MORIMOTO1960 Volume 22 Issue 3 Pages 107-110
Published: December 30, 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSWe have made into theoretical analysis pertaining to the rising corn and obtained the following results.
1. There are two kinds of losses, one is caused from the friction of the grain and the pipe and the collision of the grain among themselves, the other, is the velocity loss which is meant the speed of the blade is not given fully to the grain, to consider which losses, its figure of the rotation is given by the formulars (1·6), (1·7).
2. The pipe which leads the grain in is not the same with the movement to that of the tracting, in order to lead the grain forcibly, is shown by the formula (2·6)
3. We therefore, have found theoretically that there is not given thrashing to the grain during which falling down and which is shown by the formula(3·6) (3·7).
4. The shape of the rotating blade for the rising corn is itself suggesting lots of problems for its shape, and its caution to the design of blade is given in the 4th paragraph.View full abstractDownload PDF (612K) -
F. SHOJI, K. KAWATE, H. MORISHIMA1960 Volume 22 Issue 3 Pages 111-115
Published: December 30, 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn this paper authors have surveyed some performances of “Ridemaster” as an example of a tricycle tractor and observed some merits of this type as follows.
Generally speaking, in this type of tractor, the compromise between increment of drawbar power and ease of steering is rather difficult. In order to increase the pull power, the center of gravity is located very near to the front wheel, so that the steering is very heavy but accurate, and that the road holding is fairly excellent, however, in spite of that, the drawbar power is rather less than ordinary rear driven tractor especially at plowed land.
Like other three wheelers, Ridemaster has poor stability for overturning. In addition to that the center of gravity displaces according as the heavy front block of tractor turns when the handle is steered, this apt to cause the danger of overturning (See fig. 2).
However, if we should notice these characteristics, this tractor may be convenient because of low initial cost and ease of handling derived from the simplicity of construction, and because of accuracy of steering with the application of front wheel drive system. And this type of tractor is evaluated to be suited for commercial growing and other light farm operation.View full abstractDownload PDF (2621K) -
1960 Volume 22 Issue 3 Pages 118b
Published: 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (144K) -
1960 Volume 22 Issue 3 Pages 118a
Published: 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (144K)
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