巻号一覧
34 巻 (1999)
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34 巻, 1 号
選択された号の論文の5件中1～5を表示しています
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呉 慧敏, 太田 義信, 片岡 崇1999 年 34 巻 1 号 p. 3-12
発行日: 1999/03/10
公開日: 2010/02/09
ジャーナル フリーWorking area and cost were discussed based on 3 composed mechanized equipment levels in case that a cooperative method for grass harvesting work will be used by several small scale dairy farms. Coverage and working cost for forage grass around Morioka city in a suitable harvesting period were calculated. Selection of grass harvesting system and its productivity were also discussed according to profitable working area by comparing the advantages in case of changing the annual working proportion of wrap grass silage and hay harvesting. The results are as follows.
1) For the same mechanized equipment level, the working cost of the hay harvesting system was lower than that of the wrap grass silage system. However, the difference of cost between the two systems decreased with increasing working area.
2) For the estimated working area based on the number of available working cycle in a suitable harvesting period for the forage grass around Morioka, the working cost was separated into grass cultivating cost and harvesting cost for discussion. Differences among the 3 mechanized equipment levels were small for the grass cultivating cost but large for harvesting cost at the same working area. Total working costs for the coverage of each mechanized equipment level were about 210, 000yen/ha.
3) The profitable working area of mechanized equipment I, II and III which are shown in Table 1 for the combination of the wrap grass silage (for first grass and third grass) and the hay harvesting (for second grass) were 9, 12 and 16 ha respectively. If the weather is good, it is more profitable to change the wrap grass silage method into the hay harvesting method.抄録全体を表示PDF形式でダウンロード (1145K) -
豊川 勝生1999 年 34 巻 1 号 p. 13-22
発行日: 1999/03/10
公開日: 2010/02/09
ジャーナル フリーThe posture and heart rate of 7 chiansaw men were investigated. The results obtained are as follows.
1) By Ovako Working Posture Analysis System, 82% of the posture of worker were classified into the operation under moderate work load, but 12% of that were classified into the operation under heavy burden. The posture under heavy burden appeared the operation of felling, i. e. undercutting and backcutting.
2) The work intenity level equaled moderate physiological loads from the increasing rate of chainsaw men's heart rate, but the level of the % HRmax on older worker equaled or was over the upper limit of physical work capacity in 8 hours work. The higher heart rate appeared in the felling, the wedge driving and the walking with chainsaw on slope. Judging from the % HRmax, the optimum time in one continuous work and one rest would be estimated respectively about 50min. and 20min. in the heavy work, and about 100min., 25min. in moderate work.抄録全体を表示PDF形式でダウンロード (1282K) -
2.水稲移植作業の能率が向上する可能性松森 一浩, 富樫 千之1999 年 34 巻 1 号 p. 23-28
発行日: 1999/03/10
公開日: 2010/02/09
ジャーナル フリーTo study the possibility of rising work efficiency by introducing farm-road-turning form (use farm road for turning=F. R. T.), the simulation according to the working strokes of F. R. T. and standard-turning form (turning in the field=S. T.) was done at rice transplanting work.
The results are as follows;
1) When the return work turning time (t1) is shorter than 3 times of the head land work turning time (t2) at the S. T, the turning time at the F. R. T. (t1′) must be shorter than {(a-1)/(a+1)} t1+{2/(a+1)} 3t2. And t1′ must be closer to the t1 according as the short side length of the field becomes long. To make shortning the total turning time, the design of the farm land consolidation which were connected with climbing capacity of rice transplanter, the turning form and so on must be considered.
2) The transplanter which has wide operating width is useful for the F. R. T.
3) The work is started at the time when the transplanter is got in the field, and it is stopped when it is gone out the field. The transplanter can be gone out from anywhere of the short side of the field. So, moving time of the F. R. T. will be shorter than the S. T.
4) The support workers can supply the materials with little restrictions at the F. R. T. As the final return works turning involves head land works at the S. T, the required distance might be longer than the regular workable distance. And it will cause an another materials supply. So, supply time of the F. R. T. will have a possibility to be shorter than the S. T.抄録全体を表示PDF形式でダウンロード (815K) -
荒木 肇, 伊藤 道秋1999 年 34 巻 1 号 p. 29-37
発行日: 1999/03/10
公開日: 2010/02/09
ジャーナル フリー1995年7月に緑肥用コムギと1年性マメ科牧草のヘアリーベッチを栽培し,9月に刈り倒して「オーガニックマルチ・不耕起」状態で結球型レタスを無肥料で試作すると,無マルチ耕転圃場・コムギマルチ圃場(出穂せず茎葉の残渣)・ヘアリーベッチマルチ圃場の順に収量が増加した.
1996年春季にコムギは出穂し,ヘアリーベッチは茎葉を繁茂させたので,6月に再度刈り倒して「オーガニックマルチ・不耕起」状態を作り,土壌環境を調査して,3種野菜を無肥料で試作した.オーガニックマルチ圃場の地温は無マルチ耕転圃場より安定し,夏季や初秋では地温を低下させ,晩秋には地温を上昇させた.土壌水分に関して,地中15cmのpF恒は無マルチ耕転圃場では梅雨終了後急速に上昇したが,ヘアリーベッチマルチ圃場ではpF1.5～1.8に維持され,保水性が示された.オーガニックマルチ下の土壌を10月に採集して培養すると,無機化窒素量は無マルチ耕惹圃場に比べて多かった.7～8月に発生した雑草量は無マルチ耕惹圃場に比べて,コムギマルチ圃場では53%に減少し,ヘアリーベッチマルチ圃場では約5%に減少した.ヘアリーベッチマルチ圃場で無肥料栽培したトマト・エダマメ・サラダナの収量は他より有意に高かった.抄録全体を表示PDF形式でダウンロード (1786K) -
石川 駿二, 植村 直己, 塩谷 哲夫, 本間 英治, 真下 美佳1999 年 34 巻 1 号 p. 39-52
発行日: 1999/03/10
公開日: 2010/02/09
ジャーナル フリーIn Japan, the harvesting time for highbush blueberry cultivars coincide with the rainy season. Fruits quality has been low due to cloudy and rainy conditions. Fruits cracking can be a problem with very wet soil following rain.
To protect fruits from the rain, we try to grow five cultivars of highbush blueberry, under artificial condition in a plastic house; included varieties were Weymouth, Earliblue, Collins, Darrow and Coville.
1) In 1994 and 1995 the plants in the plastic house were covered with vinyl sheets from March to the harvesting time. In 1996 the vinyl sheets were removed from the plastic house after flower fell.
2) The maximum daily temperature within the plastic house was 10°C-15°C higher than temperature in the open field. Due to these higher temperature, the plants sprouting date, leaf opening date, and first blooming date advanced by about 10 dats. Because of this advanced growth, harvest time in the plastic house began before the rainy season.
3) The fruit sets from trees in the plastic house yielded a higher percentage than those tested in the open field. In 1994 and 1995 fruits sets from trees in the open field yielded varying berries of weight and size than those grown in the plastic house. In 1996, fruits grown in the plastic house tended to be larger.
4) The experiment of 1996 showed that the plants protected by the plastic house resulted well with early ripning, in yield, in size and quality.抄録全体を表示PDF形式でダウンロード (1570K)
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