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Volume 47 (1985 - 198･･･
- Issue 4 Pages 427-
- Issue 3 Pages 271-
- Issue 2 Pages 151-
- Issue 1 Pages 2-
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Volume 47, Issue 2
Displaying 1-16 of 16 articles from this issue
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Kyojiro INOUE1985 Volume 47 Issue 2 Pages 151-152
Published: 1985
Released on J-STAGE: April 30, 2010
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A Fertilizer Applicator and A Cultivating MachineYasuho MATSUYAMA, Katsuro OKAMURA, Yoshimi MATSUMOTO, Kazuo SATONAKA1985 Volume 47 Issue 2 Pages 153-158
Published: 1985
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSAccording to the experimental results obtained before, a fertilizer applicator and cultivating machine were constructed for the experiment. The chassis used here was reported previously in the Ist report. A fertilizer applicator and a cultivating machins consist of two ridge type and the horse power of the engine that can produce 8.3kW (12PS) is enogh to do it because a stretch of row spacing in young tea field can be cultivated by traveling twice and a stretch of row spacing in medium and mature tea field is cultivated by traveling once. The complex fertilizer containing organic matter was used as an experimentai fertilizer and in this case a fertilizer applicator was superior to manual fertilization in uniformity of distributed fertilizer. And the difference between the amount, of actual fertilizer distribution and the amount of designed one was Less than 10% of the designed value. The fertilizer distributing and cultivating area per hour was 25.3-30a/h.View full abstractDownload PDF (2884K) -
Field Test on Trial BladesSakae SHIBUSAWA, Noboru KAWAMURA1985 Volume 47 Issue 2 Pages 159-167
Published: 1985
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis paper describes the effect of the trial blades whose circular scoop surface are designed with the method described in previous paper on the improvement of backward throwing of soil clods and the reduction of tilling power in deep tillage compared to conventional Japanese curved blades. The experimental results were as follows:
(1) The trial blades in up cut rotary tilling threw much more soil clods backward at any tilling depth and then achieved remarkable reduction of the clods re-tilled in the rotating zone of the blades.
(2) The trial blades in up cut rotary tilling reduced tillage power requirement by 40% to 60% in deep tillage compared to Japanese curved blades in both up cut rotary tilling and down cut rotary tilling.
(3) In case of trial blades, the smaller curvature radius of the scoop surface was more superior backward throwing of clods and less tillage power requirement in deep tillage.View full abstractDownload PDF (5611K) -
Experiment of Thin Layer ConditioningKazuhiko ITOH, Shuso KAWAMURA, Yoshinori IKEUCHI1985 Volume 47 Issue 2 Pages 169-175
Published: 1985
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis study was carried out to determine the reasonable conditions of brown rice conditioning using thin layer conditioning method. The paper describes the rate of water absorption, property of brown rice, electric energy consumption and property of milled rice under the conditions such as initial moisture content of brown rice, air temperature, air humidity and rice variety.
The rate of water absorption increased with the the decrease of brown rice moister content or incease of air temperature and air humidty. It was found that the difference of water absorption rate was found among varieties. Generally speaking, the rate of water absorption of full ripeness browh rice was increased. The electric energy consumption and an unstriped embryo rate was decreased accoring to the conditioning.
There was found a correlation between the rate of broken kernel and the rate of cracking. An increase in fatty acid was not effected by conditioning.View full abstractDownload PDF (1234K) -
Measurement of Fruit Location by MOS Type Color TV Camera and Fundamental Experiment of Fruit HarvestingNoboru KAWAMURA, Kiyoshi NAMIKAWA, Tateshi FUJIURA, Motonobu URA1985 Volume 47 Issue 2 Pages 177-182
Published: 1985
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSTo develop an agricultural robot which travels between crop rows and automatically harvests tomatoes and other fruits, an image input device which sensed the crop vision was constructed and experimented. By the image input device, the picture of fruits was fed from a MOS type color TV camera to a microcomputer. And the three-dimensional location of each fruit was calculated by means of a stereo-camera. Red and ripe tomatoes were used in this experiment as the fruits, and the discrimination between fruits and other materials such as leaves and stems was done by comparing the red-signal and the brightness-signal from the TV camera. The measuring accuracy was fairly good in case the fruit did not overlap each other and was not hidden by leaves and stems. The detected fruit was grasped well by the manipulator which was described in Part 1 of this report.View full abstractDownload PDF (2663K) -
Naoki SAKAI, Wataru SUNOHARA1985 Volume 47 Issue 2 Pages 183-189
Published: 1985
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIt is important to improve a rate of press in order to increase an efficiency of the grass press system. In this paper, the authors investigated the pre-treatment methods from factorial experiment for the promotional effect on grass press by using a small type apparatus. In the experiments of three selected pre-treatment methods for the six crops, the authors measured a rate of press(Rj) and consumed electric energy (Em) by using a screw press, and obtained the linear relationships between Mi (initial water content of crop) and Rj, between Mi and Em, between Mi and Cj (juice concentration). It was shown that the possibility of piling method having the merits from the viewpoints of required energy, promotional effect on a rate of press and crude protein distribution to juice.View full abstractDownload PDF (1196K) -
Prediction of SeparabilityYasuhisa SEO, Hiroshi MORISHIMA, Akira HOSOKAWA1985 Volume 47 Issue 2 Pages 191-195
Published: 1985
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe weight separation of male and female silkworm pupae has been out of use because of increaed overlaps in their weight distributions. This has been brought about by recent labour-savings in silkworm rearing such as “joso” rearing. However, the weight separation was reconsidered in this study with possible application of recent advanced technology in weight measurements in order to mechanize the operation of the separation which is now entirely dependent on visual judgement.
The main objective of this study was to predict the separability of the male and the female in weight because the prediction of the separability should be required for the effective operation in mechanization.
The prediction could be possible by the regression line with the mean and the standard deviation of weight of sampled male and female cocoons (Fig. 2).
Weight distributions of the two hundred sampled male and female cocoons were nearly represented by normal distributions. The separation at the upper 1 percent point of the male and lower 1 percent point of the female in normal distributions also showed similar figures in the separability to the regression line method above (Tab. 3 and Fig. 5).View full abstractDownload PDF (907K) -
Hammer Type and Cylinder Type ChippersToshitaka UCHINO, Masaki MATSUO, Mitsuo IIMOTO1985 Volume 47 Issue 2 Pages 196-200
Published: 1985
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe chipping characteristics of a hammer type and a cylinder type chippers were continuously evaluated and compared with those of a fly wheel type chipper on preceding paper.
For a hammer type chipper, the mean power repuirements were reduced as the moisture contents of the tested branches were decreased. This tendency was opposite to a flywheel type chipper, since the chipping of flywheel type chipper depends on cutting action but that of hammer type chipper depends on impact.
A hammer type chipper is suitable for chipping a large quantity of pruned branches because of its large capacity and low power requirements. A cylinder type chipper is favorable to chip twigs for its very low power requirements when chipping rate is low, and a flywheel type chipper is desirable when small and uniform chips are needed.View full abstractDownload PDF (2642K) -
Elastic Soil Deformation beneath an Elastic WheelTatsuo HIROMA, Yoshinobu OHTA, Keisuke SUYAMA1985 Volume 47 Issue 2 Pages 201-209
Published: 1985
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to investigate the mobility and the tractive performance of a wheel-type tractor, the deformation of soils beneath a wheel has been analyzed by the finite element method in this series of reports, taking account of the friction between a wheel and soils. In the Part I of the serial reports, the wheel was assumed to be a rigid body. In this report, considering the deflection of the tire, wheel was assumed, as an elastic model which is composed of the rigid rim and a number of the rigid rim and a number of springs in stalled radially to the rim. Further, soils are assumed to be a Hookean elastic body. Then, soil deformations beneath the wheel which undergoes a linkage and/or a slip were analyzed by the finite element method. The calculated results showed a fairly well agreement with experimental data obtained by the small soil bin test.View full abstractDownload PDF (3329K) -
Behavior of Spray Injected into Combustion ChamberKen ARAYA, Tomiho YOSHIDA1985 Volume 47 Issue 2 Pages 210-215
Published: 1985
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe ignitability, under low temperatures, of sunflower oil (or general plants oil) was much poorer than that of diesel oil. This might be due to the characteristics of sunflower oil itself and that the combustion chamber is pre-combustion chamber type. In this paper, being composed of the ignitability when sunflower oil burned in a pre-combustion chamber type diesel engine, was analysed, which has the most complicated structure among diesel engines.
As a result, the flow velocity at the connecting passageway became maximum at a crank angle of 20° before TDC. Its absolute value was 160m/s, which prevent the penetration of the particles into the main combustion chamber. This was the main cause of poor ignition in the pre-combustion chamber type diesel engine. When sunflower oil and No. 2 diesel oil were injected against this flow velocity, the initial velocity of No. 2 diesel oil was higher than sunflower oil because of the low density; however, the maximum penetration distance of sunflower oil was shout 1.6 times as large as No. 2 diesel oil because of the larger particle size.View full abstractDownload PDF (4716K) -
Kanji YONEMOTO1985 Volume 47 Issue 2 Pages 219-224
Published: 1985
Released on J-STAGE: April 30, 2010
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Yoji MARUTANI1985 Volume 47 Issue 2 Pages 225-229
Published: 1985
Released on J-STAGE: April 30, 2010
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Suguru ARIMOTO1985 Volume 47 Issue 2 Pages 230-236
Published: 1985
Released on J-STAGE: April 30, 2010
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Noboru KAWAMURA, Tateshi FUJIURA, Motonobu URA, Naoshi KONDO1985 Volume 47 Issue 2 Pages 237-241
Published: 1985
Released on J-STAGE: April 30, 2010
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Nobutaka Ito1985 Volume 47 Issue 2 Pages 242-246
Published: 1985
Released on J-STAGE: April 30, 2010
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Kiyoaki MATSUDA1985 Volume 47 Issue 2 Pages 247-252
Published: 1985
Released on J-STAGE: April 30, 2010
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