巻号一覧
25 巻 (1990)
- 3 号 p. 209-
- 2 号 p. 113-
- 1 号 p. 2-
25 巻, 3 号
選択された号の論文の10件中1～10を表示しています
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第3報 試作機利用によるビール麦の生育試験三竿 善明1990 年 25 巻 3 号 p. 209-216
発行日: 1990/11/20
公開日: 2010/02/09
ジャーナル フリーAlong with the rising popularity of introducing large scale machinery in to the field and the loss in opportunity for tilling deeper soil due to the wider adoption of rotary tillage, it is now recognized that unfavorable field conditions for plant cultivation are spreading as hard layers form in the subsoil directly below the cultivated surface soil.
The purpose of this series of papers is to develop some kinds of implement in order to improve the above circum stances.
This paper describes the results of field tests of beer brewing barley under several experimental combinations using the rotary tiller and subsoil breaker with a chisel type subsoiler.
As a result, the fresh plant weight and dry plant weight of beer brewing barley increase linearly as working depth increases. Their correlation coefficients are over 0.8. The fresh plant weight and dry plant weight of beer brewing barley increase linearly as the crosssectional area of subsoil breaking becomes wider.
It can be suggested that the rotary tiller and subsoil breaker with a chisel type subsoiler can play an important role in plant cultivation in the field.抄録全体を表示PDF形式でダウンロード (1044K) -
第6報 モデル設計にみる主要農業機械・装備の経済性について遠藤 織太郎, 高山 鎮紀, 倉田 和彦1990 年 25 巻 3 号 p. 217-221
発行日: 1990/11/20
公開日: 2010/02/09
ジャーナル フリーPDF形式でダウンロード (809K) -
第3報 ネギ皮むき機の騒音特性笹尾 彰, 米村 純一, 吉田 政雄1990 年 25 巻 3 号 p. 222-227
発行日: 1990/11/20
公開日: 2010/02/09
ジャーナル フリーThe noise characteristics of a welsh-onion peeling machine and its effect on farmer's health were surveyed.
The results are as follows:
1) The noise level produced by each machine was over 100dB (A).
The noise could be mainly due to nozzle jet, collision between air and solid (welsh-onion) and the peeling flutter.
The result of the noise frequency analysis showed the maximum sound pressure level (SPL) at 8, 000Hz band. Such high frequency sound has straight movement, so it could be easily arrested by covering.
2) While using the machine during a day, each operator was exposed to about 100dBLeq (equivalent sound level) noise, whereas each assistant to 85-90dBLeq noise.
3) The welsh-onion bruises made by using peeling machine could be mainly due to touching the nozzle than the air jet.抄録全体を表示PDF形式でダウンロード (1517K) -
第4報 ネギ皮むき機の防音装置笹尾 彰, 米村 純一, 吉田 政雄1990 年 25 巻 3 号 p. 228-235
発行日: 1990/11/20
公開日: 2010/02/09
ジャーナル フリーIt is considered to be an effective method to cover the noise resource in order to eliminate the high frequency noise from a welsh onion peeling machine.
In this study, some soundproof equipments were made on an experimental basis and their performance were tested. Moreover, a method to prevent a welsh onion from damage caused by the machine's nozzle was investigated. Results are as follows;
1. The noise could be reduced, down by over 10dB (A), by using a cover with an absorbing material (e.g. urethance). Specially, a high frequency range sound was more reduced. Therefore, the permitted operating time per day could be extended 5 to 8 times longer than by using one without cover.
We could obtain a similar effect by using a trial muffler with an expanding room.
In a soundproof equipment, cover's shape had a low effect but the absorbing material had a high effect.
2. The damage of a Welsh onion caused by using a peeling machine could be almost prevented by wrapping a urethane around the nozzle of the machine. Therefore, by this method the noise could be reduced down to about 4dB (A).抄録全体を表示PDF形式でダウンロード (1837K) -
松尾 和之, 窪田 哲夫1990 年 25 巻 3 号 p. 236-241
発行日: 1990/11/20
公開日: 2010/02/09
ジャーナル フリーPDF形式でダウンロード (851K) -
石束 宣明1990 年 25 巻 3 号 p. 242-251
発行日: 1990/11/20
公開日: 2010/02/09
ジャーナル フリーThis report is concerned with a computer aided system for making decision on an optimum scheduling of farm work operation in an attempt to get the the maximum operable area under the condition of working capacity, working hours.
The computer aided system is structured by using Smalltalk-80, which is an object oriented programming language, in order to give suitability to entire presentation, putting data into a computer, setting parameters and displaying results. Linear Programming is used as a method for getting the result in the system.
The object of this system is to make the total crop production area maximizing and then to show the schedule of farm operation in each stage given by farm work periods. And the process to optimization is subject the cropping pattern including the cultivating ratio of crops, the farm work periods, the workable hours and the working capacity.
Since the process for making the input data fit to Linear Programming is promoted automatically, it doesn't need any knowledge about Linear Programming to use the scheduling system for making decision on farm work operation.抄録全体を表示PDF形式でダウンロード (1313K) -
月橋 輝男1990 年 25 巻 3 号 p. 252-259
発行日: 1990/11/20
公開日: 2010/02/09
ジャーナル フリーThe character of bur setting of the vegetative shoots of the preceding season were compared with that of the flower bearing shoots (containing female flower bearing shoots and only catkin bearing shoots) of the preceding season.
Four varieties, ‘Ginyose’, ‘Tsukuba’, ‘Ishizuchi’and‘Tanzawa’were used.
The thickness and the length of the new shoots sprouted on branches of the preceding season which the weak twigs were cut off at winter pruning were compared with those of the new shoots from the branches with the twigs left as they were.
Results as follows;
1) Bur setting of‘Ginyose’seemed unstable.
2) Young trees had more female flowers than old trees in all four varieties.
3) The number of female flowers had a higher correlation to the thickness rather than the length of the shoots of the preceding season.
4) A high correlation was seen between the number of female flowers and the yield of burs.
5) It was suggested that the use of vegetative shoots of the preceding season is useful in young trees for the varieties which the bearing of female flowers were good, but the trees should be kept fairly vigourous.
6) It was desired that the cuting off of the weak twigs should be kept to a minimum quantity.抄録全体を表示PDF形式でダウンロード (1000K) -
小堀 乃, 大塚 寛治, 伊藤 清一1990 年 25 巻 3 号 p. 260-266
発行日: 1990/11/20
公開日: 2010/02/09
ジャーナル フリーAn attempt has been made to evolve some indexes, which would represent work hardiness, for the evaluation on the efects of farming implement on the work hardiness of two trimming tasks of melon in greenhouse operation.
These indexes were estimated from the trendgram of the rate of increase of heart rate during task phase on the operating subjects.
As the results of experiments, it is clarified that these indexes estimated from trendgram were changed in the case when operating subjects, status during task phase were changed into more adapted status for the subjects, Therefore, it is clarified that the effects of farming implements would be estimated by the changes of these indexes.抄録全体を表示PDF形式でダウンロード (1225K) -
古谷 正1990 年 25 巻 3 号 p. 267-274
発行日: 1990/11/20
公開日: 2010/02/09
ジャーナル フリーPDF形式でダウンロード (2435K) -
朴 圓奎1990 年 25 巻 3 号 p. 275-281
発行日: 1990/11/20
公開日: 2010/02/09
ジャーナル フリーThe objectives of this study is to measure the current status of farm mechanization and its investment by analyzing the results of a survey conducted in 1989 on farm machinery use and mechanized farming acreage.
Followings are summaries of the study.
1. Use of power tillers and binders are generally limited to own farming work. However, tractors, rice transplanters, and combines are utilized more intensively for custom work and joint utilization with neighboring farmers.
2. The number of tractors for each 100 farm households is 1.8 units rice transplanters 6.3 units and combines 1.9 units being equivalent to those of Japan in the early 1970s or, for the cases of rice transplanters and harvesters, of Taiwan in the early 1980 s.
3. Percentage of area worked by machine to the total farm area is 81.7% in powing and leveling, 66.3% in transplanting, 87.5% in pest and disease control, 62.1% in harvesting and 12.5% in drying.
Mechanization for rice transplanting harvesting and drying still remains relatively at a low level.
4. Expenditures for farm machinery and implements are about 10.2% of the total farm management expenditures (23.6% in Japan), and 13.2% of the total farm household asset to farm machinery and implement (29.4% in Japan) still reflecting a low level below that of Japan in 1970 s.抄録全体を表示PDF形式でダウンロード (806K)
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