巻号一覧
15 巻 (1959 - 1960)
- 4 号 p. 123-
- 3 号 p. 83-
- 2 号 p. 41-
- 1 号 p. 1-
15 巻, 2 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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井上 栄一1959 年 15 巻 2 号 p. 41-45
発行日: 1959/09/15
公開日: 2010/02/25
ジャーナル フリーTaking the effect on the turbulent structure in atmospheric surface layer of the stability length L defined by Monin and Obukhov (1954) as
L=-V*3/kg/Θ0q/Cpρ
into account, the vertically two-dimensional phenomena in the surface layer are characterized by the roughness parameter (H/Z0) and the stability parameter (H/L), where H and Z0 denote the characteristic vertical scale of phenomena and the roughness length. The similarity of phenomena is shown to be given by the equality of both parameters of (H/Z0) and (H/L). The former condition is satisfied by the geometrical similarity of model and the latter requires the condition of
V*13/q1H1=V*23/q2H2,
where sufices 1 and 2 denote respectively the quantities in the actual phenomena and in thee model experiment. For example, when the condition of V*1=V*2 is satisfied by choosing the same wind velocity U1=U2 at the heights of H1 and H2, the heat flux q2 must be incresed to σ times q1, where σ is the reduction rate of model scale, i.e. σ=H1/H2. Several methods are proposed of appling these theoretical considerations to the model experiments of the stack meteorology and of the wind break problems in a strongly stabilized surface layer during winter cold nights when the frost damage to vegetations is apt to break out.抄録全体を表示PDF形式でダウンロード (753K) -
霜道田中 貞雄, 谷沢 恒夫, 柿沼 計1959 年 15 巻 2 号 p. 46-48
発行日: 1959/09/15
公開日: 2010/02/25
ジャーナル フリーIn the northern part, piedmont district, of Nasu-Gun, Tochigi-Ken, we have surveyed over the inveterate frost damaged-Zone, covering 400ha. In this area are two long narrow strips of frost-belt, and at the zone about 2km off the mountain-base is seen the severest frost-damage.
Cold air current through the frost-belt, rises from the grass or the thin groves of deciduous tree at the mountain-side, and it streams down, like a river, along lower parts of land avoiding obstacles.
With needle leaf trees in cold current, the temperature goes up and it downs when with the grass or deciduous trees. The frost belt reforms its way as the wind shifts, but under 2m/sec wind velocity, little change has appeared.
After all, the best way to destroy frost-belt entirely is:
To seek the cradle of cold current among needle trees groves
To raise tempertaure by admitting cold current into needle leaf trees belt
To keep cold current in check and drift it away towards no harm, in needle leaf trees抄録全体を表示PDF形式でダウンロード (444K) -
香辛作物及び雑草の発芽矢吹 万寿, 宮川 逸平1959 年 15 巻 2 号 p. 49-54
発行日: 1959/09/15
公開日: 2010/02/25
ジャーナル フリーThe relations between the diurnal variation of temperature and the germinations of condiment crops and weeds were made cleard by mean of the sets of newly devised thermostat.
The thermostat can vary freely the temperature in a box with lapse of time.
The temperature in the thermostat were respectively regulated to keep the mean temperature of 15, 20, 25, 30 and 35°C with the amplitudes of 0, 2.5, 5.0, 7.5 and 10.0°C, their range being 0, 5, 10, 15 and 20°C.
The germinating rates of following seeds increased with increasing amplitude of temperature;
Polygonum Hydropiper L., Polygonum Blumei MEISN, Polygonum Yokusaianum MAKINO, Apinum gravelens L., Setaria viridis BEAUV, Sargassum Thunbergii O. KUNTZE, Phytolacca esculenta var. HOUTT, Amaranthus inamoenus WILLD and Xanthium Strumarinum L.
However, the germination of Perilla frutescens, var. crisps DECNE decreased with increasing amplitude and the germination under the different diurnal ranges of temperatures were exactly alike,
The germinating rates of Pennisetum japonicum TRIM were independent of temperature range.抄録全体を表示PDF形式でダウンロード (825K) -
1959 年 15 巻 2 号 p. 54
発行日: 1959/09/15
公開日: 2010/02/25
ジャーナル フリーPDF形式でダウンロード (158K) -
渡辺 由勝1959 年 15 巻 2 号 p. 55-58
発行日: 1959/09/15
公開日: 2010/02/25
ジャーナル フリーTo investigate the effects of southern inclined ridges upon the growth and the yield of late sown wheat, the experiments were carried out in 1955 and 1956.
I. Relation between the angles of inclination and the width of the ridges.
The angles were 10°, 20° and 30°; and the widths were 61cm, 91cm and 121cm. Therefore, the ridges were made of these two factors.
As to the plant height and the number of stems, the ridge inclined the more and became the wider, the plants grew the more vigorous. On account of more drying of soil with inclination of the slope, however, the yields were excellent on following ridges: 10° and 20° of 61cm, 20° of 91cm and 20° and 30° of 121cm.
II. The effects of the southern inclined ridges upon the late sown wheat.
The comparison was made between the inclined ridge and the flat fleld in relation to late sowing culture in which the seeds were sown later 10 or 20 days than control. The plant height, the number of stems and the yield of grains on the inclined ridges exceeded those on the flat field, because of higher soil temperature in winter in the inclined ridges. Therefore, it seemed that the excellence of the inclined ridge was more effective in late sowing culture.抄録全体を表示PDF形式でダウンロード (554K) -
坂上 務1959 年 15 巻 2 号 p. 59-63
発行日: 1959/09/15
公開日: 2010/02/25
ジャーナル フリーThe author investigated the microclimate on the waste heap from the forest point of view. That is, the slopes were favourable to the sliding down of cold air and the rising of warm air, on the slopes, the layer of air near the ground had the peculiar meteorological properties.
Like a skin of air it clothes and determined the climatic habitate of the plants growing thereon. There were 10 observation points located on the slopes of different direction and high degree.
The sketch map (Fig. 1) shows by the configuration of the contours how regular the cone is on all sides, and it lies at an average inclination of 30°. All the points of maximum and minimum temperature readings were taken at a height of 30cm in winter, and vertical distribution of temperature and humidity readings were taken at o-150cm height in spring & summer. Fig. 6-9.
Fig. 1-Fig. 4 show the distribution of maximum and minimum temperature on the waste heap on average for winter days.
It was to be found that the lowest temperature and maximum temperature range would be found on the south slope, and results of humidity measurement on the south slope, had dry air layer, so the plants did not easy grow there.抄録全体を表示PDF形式でダウンロード (2526K) -
長谷川 新一, 中山 兼徳1959 年 15 巻 2 号 p. 64-70
発行日: 1959/09/15
公開日: 2010/02/25
ジャーナル フリー1. The growth and yield of upland rice have been reduced by the cool weather in summer as severely as that of paddy rice in Kanto district.
2. The yield of upland rice was more severely reduced by the cool weather during the earlier part of growing season than by that during the later part of season. The rate of yield reduction of upland rice by the former was greater than that of paddy rice, and the damage was seen all over the district, but especially severe in the northern part.
3. The comparison of the growth and yield of upland rice in 1953 (the year of cool weather) with those in 1952 (the normal year) showed that the low temperature during the earlier part of season reduced the height of plants and delayed the tillering, reducing the ear length and number of grains, what was more, the percentage of sterile grain increased and 1, 000-kernel weight decreased by the delayed heading. The reason why the injury of upland rice is severer than that of paddy rice seems to be as follows:
a) As upland rice is sown and grown between the row of barley or wheat, the tillering is apt to be restricted, especially under unfavorable weather conditions.
b) As the growing season is shorter than that of paddy rice, it is difficult to recover from the cool weather injury even under the favorable weather condition during the later part of the growing season.
4. For these reason, the cultural methods as continuous cropping, light dressing of fertilizer, and sparse standing, or law and wet field condition make the injury severe.
5. The yield reduction of upland rice in the years when the yield of paddy rice was severely reduced by the low temperature during the later part of growing season was rather small as compared with those of paddy rice and those by the cool weather during earlier part of season. This is due to the earliness of heading and the resistant property of upland rice to leaf blight that prevail in the cool weather condition.抄録全体を表示PDF形式でダウンロード (1038K) -
田中 貞雄1959 年 15 巻 2 号 p. 71-72
発行日: 1959/09/15
公開日: 2010/02/25
ジャーナル フリーPDF形式でダウンロード (368K) -
坂上 務, 松田 昭美1959 年 15 巻 2 号 p. 73-78
発行日: 1959/09/15
公開日: 2010/02/25
ジャーナル フリーPDF形式でダウンロード (4167K) -
吉田 照雄, 今岡 円七1959 年 15 巻 2 号 p. 79-81
発行日: 1959/09/15
公開日: 2010/02/25
ジャーナル フリーPDF形式でダウンロード (454K)
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