巻号一覧
23 巻 (1988)
- 3 号 p. 175-
- 2 号 p. 89-
- 1 号 p. 1-
23 巻, 3 号
選択された号の論文の9件中1～9を表示しています
- |<
- <
- 1
- >
- >|
-
足立原 貫1988 年 23 巻 3 号 p. 175-178
発行日: 1988年
公開日: 2010/02/09
ジャーナル フリーPDF形式でダウンロード (705K) -
作物収量への影響坂井 直樹1988 年 23 巻 3 号 p. 179-188
発行日: 1988年
公開日: 2010/02/09
ジャーナル フリーPDF形式でダウンロード (1506K) -
第21報 焼畑における病害虫および鳥害の防除法菅原 清康, 進藤 隆1988 年 23 巻 3 号 p. 189-195
発行日: 1988年
公開日: 2010/02/09
ジャーナル フリーPDF形式でダウンロード (1190K) -
第22報 焼畑における獣害の防除法菅原 清康, 進藤 隆1988 年 23 巻 3 号 p. 196-201
発行日: 1988年
公開日: 2010/02/09
ジャーナル フリーPDF形式でダウンロード (1117K) -
疋田 慶夫, 垂井 不二男1988 年 23 巻 3 号 p. 202-210
発行日: 1988年
公開日: 2010/02/09
ジャーナル フリーTo evaluate or prevent the pesticide exposure of farmers, the information on particle size distributions of pesticide aerosols are essential, The particle size distributions in a smoking agent, dusts and a spraying agent were investigated in this report.
The results may be summarized as follows.
1) Most of the particles of TPN smoking agent distributed in the respirable range less than 7μm.
2) The particle size distribution functions of a fine dust and a general dust could be expressed by lognormal distributions, and the particles of these dusts also distributed in the respirable range.
3) In order to consider the particle size distribution of sprayed pesticide, the evaporation rate constant by Kobayasi was introduced. Lognormal distribution could be applied to the aerosol particles of sprayed TPN wettable powder, and its geometric mean diameter clearly decreased with the increase of evaporation rate constant. The geometric standard deviation of that distribution did not greatly change.
As a result of estimating particle size distributions of sprayed pesticide in a greenhouse, the case of 50% respirable particles was possible.抄録全体を表示PDF形式でダウンロード (1033K) -
山下 淳, 安部 武美, 李 世翔1988 年 23 巻 3 号 p. 211-217
発行日: 1988年
公開日: 2010/02/09
ジャーナル フリーIn oder to prevent stone accidents, a mowing test was conducted to evaluate the performance of a reciprocating mower type bush cutter which were newly developed. This was compared with a rotating disc type.
Some of our findings may be summarized as follows:
1) With the reciprocating type cutter, most of the struck stones were not scattered. therefore the operator has no need to worry about mowing work.
2) When the reciprocating type cutter struck against stones, the amount of GSR was much less than that obtained by using the rotating blade, which means that the mental stress of the operator was greatly reduced.
3) The reciprocating type cutter has an disadvantage over the rotating type cutter in the amount of work done. It's work efficiency on level field and slope was about 80% of the rotating type cutter.
4) The RMR for an operator on level field was 4.5 and 3.3 at a working width of 150cm respectively for the reciprocating type and the rotating type. The RMR on slope was 5.4 and 5.7 respectively for the reciprocating type and the rotating type.
5) In mowing work using reciprocating type, grass was mown one way only. In addition, the bottom of the blade contacted with mown grass and trailed producing additional operating resistance.
6) The optimum mowing width was considered to be 100cm from the results obtained in the test of surface EMG, RMR and work efficiency.抄録全体を表示PDF形式でダウンロード (1132K) -
小林 茂樹, 武藤 忠夫, 石丸 圀雄1988 年 23 巻 3 号 p. 218-225
発行日: 1988年
公開日: 2010/02/09
ジャーナル フリー1) A plant of anaerobic manure fermentation for 70 dairy cattle (converted to cow) was planned, constructed and operated.
2) The press-juice of cattle feces was treated as fermentation material. A fermentation tank of 30m3 (24t juice-sludge) composed of one-tank-type was also setted. A gas holder of 10m3 and nonwater type was adopted, which consisted of specific gum-cloth.
3) A sludge-circulation system was used for stirring sludge in the fermentation tank, and it was also used for heating sludge. Methane-composite gas, which was self-supplied from the plant, was utilized for heating sludge in the tank.
4) The fermentation was maintained at 35-37 degrees centigrade. It was presumed that the fermentation will be effective at the more lower temperature to minimize a heat loss from the cold.
5) An underground pit of manure was prepared to protect feces from freezing. But the increase of diluting water caused decrease of sludge density and organic-matter digestibility.
6) The earth, sand and admixture in sludge often caused blockages of circulating pump and heat-exchanging equipment. It was necessary to exchange the equipments and to eliminate the sand etc. periodically.
7) A sand-strainer was equipped between the press-juice tank and the sending pump.
8) After a regular fermentation was achieved, 30-70 minutes was needed per day to operate and control the plant. In addition to this labor, 255.5 hours was consumed to repair the plant in 2 years.抄録全体を表示PDF形式でダウンロード (1204K) -
小林 茂樹, 大山 銀四郎, 石丸 圀雄1988 年 23 巻 3 号 p. 226-234
発行日: 1988年
公開日: 2010/02/09
ジャーナル フリー1) Three manure systems in Nasu Experimental Station, Tokyo University of Agriculture, those are a manure disposing system using underground manure-pipes, a system merely dividing feces and urine at cow-barns, and a manure system utilizing anaerobic fermentation, were compared in view of capital investment and handling labor. In each system, clear demerits were recognized in case of the open-type free-stall barn.
2) Digestibilities of organic matter in the anaerobic fermentation were ca. 32% and 21% utilizing overground hopper and underground pit, respectively. In the latter case, a shortness of days for fermentation was caused by the increase of diluted manure.
3) 75.2% of BOD and 63.8% of COD were eliminated by means of the anaerobic fermentation utilizing underground pit.
4) 210-640Mcal per 10 days of the self-supplied methane-composite gas was consumed to heat the pressed manure, and the rest to maintain the tank-temperature. The difference of temperature between sludge in the tank and the surrounding air didn't severely affect the heat-loss from the tank.
5) The next formula was obtained between fermentation temperature(x°C) and methane-composite gas volume (y l/day) utilizing overground hopper.
y=3.31x2+360.4x+9801抄録全体を表示PDF形式でダウンロード (1368K) -
農作業データ集作成委員会1988 年 23 巻 3 号 p. 238-249
発行日: 1988年
公開日: 2010/02/09
ジャーナル フリーPDF形式でダウンロード (1581K)
- |<
- <
- 1
- >
- >|