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Volume 39 (2004)
- Issue 4 Pages 183-
- Issue 3 Pages 135-
- Issue 2 Pages 65-
- Issue 1 Pages 1-
Volume 39, Issue 4
Displaying 1-5 of 5 articles from this issue
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Yasunobu KAWAMOTO, Kunihisa IMAMURA, Hidekazu TERASAWA, Tetsuo NAMBU2004 Volume 39 Issue 4 Pages 183-190
Published: December 15, 2004
Released on J-STAGE: February 09, 2010
JOURNAL FREE ACCESSWe developed a seeding machine for PaperpotTM system in which approximately 10 seeds of Welsh onion seeds without seed coat are sown in 1 hole. We examined the cell of a cell roll structure, the rotary brush and the cell roller cover, and made a prototype using the frame of a seeding machine as a basis.
1) We investigated the seeding accuracy of 14 different combinations of hole diameters, depths and inclinations in order to find the proper hole dimension for the cell that would allow for 10±2 seeds per pot. The cell had 14 lines of holes with each hole in each line having the same diameter. The seeding accuracy was examined at different brush positions. The optimum hole diameter was 5.5mm, inclination was vertical and depth was 4.5mm.
2) The seed size varied with the variety of Welsh onion. We investigated the seed size since the seeding rate would change when working with different seeds.
3) The following results were recorded during the performance test of the seeding machine. When the brush position was -1mm-1mm, Seeding accuracy was less than Cv16%. We accomplished our goal of sowing 10±2 grains of seed in 1 pot. We judged that our machine could be used efficiently focussing on seeding accuracy and machine reliability.
4) As a result of practical trials with nineteen farmers in Miyagi we found that there were no mechanical trouble with the seeding machine. As a result of these tests, this machine was developed and sufficient practical applications were confirmed.View full abstractDownload PDF (2209K) -
Shu-huai ZHANG, Teruo TAKAHASHI, Hiroshi FUKUCHI, Kouichi SAGA2004 Volume 39 Issue 4 Pages 191-196
Published: December 15, 2004
Released on J-STAGE: February 09, 2010
JOURNAL FREE ACCESSThe objective of this research is to investigate the effect of a new cultivation method for saving thinning-labor and the growth of Japanese radish compared with the conventional cultivation method. The new cultivation method is to sow 3 seeds in 4cm, 5cm, and 6cm distances respectively, and to thin the radish seedlings only once. The conventional cultivation method is to sow 4 seeds at a time, and to thin the seedlings twice.
The field experiments have been done twice in 2002, and the main results were as follows.
1) To compare with the conventional cultivation method, the new cultivation method could save about 75% of thinning-labor.
2) The growth of radish had not significant differences between the new cultivation method and the conventional cultivation method.
3) About the average of length, weight and other data of harvested radish, almost all had not significant differences at t-test of 5% significant level between the new cultivation method and the conventional one.
4) The conclusion of this research is that the new cultivation method is an available way to save thinning-labor without negative effects for Japanese radish production.View full abstractDownload PDF (1793K) -
Michio KOMIYA, Katsumi KAWAKAMI, Shigeru MORITA, Kiyoaki MATSUDA, Tada ...2004 Volume 39 Issue 4 Pages 197-204
Published: December 15, 2004
Released on J-STAGE: February 09, 2010
JOURNAL FREE ACCESSThis study reported the mathematical model in calculating the milking efficiency of the automatic milking system (with a theoretical number of milking cows) so that the automatic milking system can be used more effectively. The milking operation time was measured throughout a 24-hour period in three types of automatic milking systems on 5 farms before the mathematical model of milking capacity was made. The cleaning interval to influence operation time was changed, and the actual operation time was measured. As a result, the following conclusions were obtained.
1) Even if the milk secretion characteristic of the herd was changed, we were able to calculate the milking capacity with the mathematical model.
2) Regarding the theoretical number of milking cows, an increase of 23-28% was recognized when the average milk flow of the herd increased from 2kg/min to 3kg/min, a decrease of 29-30% was recognized when the average daily milk yield increased from 24kg to 34kg, and an increase of 21-32% was recognized when the milk yield per milking increased from 8kg to 14kg.
3) The changes of the actual operation time by the change of the cleaning interval were 1.3-1.5%, and the change of the theoretical number of milking cows was only 3%.View full abstractDownload PDF (940K) -
Kenichi KOMEDA, Hiroyuki MAEGAWA, Masateru INOUE, Akio TAKAFUJI2004 Volume 39 Issue 4 Pages 205-211
Published: December 15, 2004
Released on J-STAGE: February 09, 2010
JOURNAL FREE ACCESSA table-shaped persimmon tree was designed to enhance efficiency in pest management work, such as chemical control, for elderly people. This paper describes a spraying work experiment with a senior simulator to evaluate elderly people's spraying efficiency with a table-shaped persimmon tree. We compared the efficiency with that for a conventional persimmon tree. In our experiment, we used water sensitive papers (becomes blue from yellow, when water is touched) to measure adhesion state. After spraying with (or without) a senior simulator, we scored the discoloration rate of water sensitive papers set on each of five leaves on four sides of the tree (upper, outside edge, inside, lower). Results from comparison of artificially designed pest managing work for table-shaped and conventional persimmon trees showed that, for the table-shaped tree: 1) irrespective of senior simulator use, the average discoloration rate was higher; 2) influence of senior simulation on the average discoloration rate was smaller; and 3) variation among the four sides of the tree was smaller. These results suggest that a table-shaped persimmon tree is suitable for elderly people when they perform management work such as chemical spraying.View full abstractDownload PDF (1132K) -
Tatsuo SATO, Takanori ISHII, Miyuki KUBO, JIRO NARIMATSU2004 Volume 39 Issue 4 Pages 213-218
Published: December 15, 2004
Released on J-STAGE: February 09, 2010
JOURNAL FREE ACCESSA method of cultivating the tomato variety “Natsunokoma” on a small scale, in a suburban field, was tested from the viewpoint of longer period in harvest and saving labor. Early sowing and planting immediately after the last frost were required for a high yield. Multiple sowing will extend the harvest over several months, as the harvest period of each plant is short. The recommended planting spacing is 160×40cm (156 plants/a). The harvest period was not prolonged if the planting density was reduced. Harvesting once a week, and harvesting using hand-vibration, saved labor.
These results suggested the following policies were useful for producing cooking use tomato: ‘Natsunokoma’. (1) Multiple sowing was available from February until April. Planting and growth season should avoid the last frost and rainy season, respectively. (2) The recommended planting spacing is 160×40cm. Any training may be unnecessary. (3) Only red fruit should be harvested repeatedly by hand when the yield was little. A single harvest method by hand-shaking should be done in obedience to the marketing, labor intensity and the ripening.View full abstractDownload PDF (1393K)
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