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Volume 29 (1960 - 196･･･
- Issue 4 Pages 387-
- Issue 3 Pages 323-
- Issue 2 Pages 191-
- Issue 1 Pages 1-
Volume 29, Issue 1
Displaying 51-58 of 58 articles from this issue
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Shigehisa KIYOSAWA1960 Volume 29 Issue 1 Pages 163-166
Published: September 01, 1960
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESS -
Yoshio KATAYAMA, Takashi NAGATOMO1960 Volume 29 Issue 1 Pages 167-168
Published: September 01, 1960
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe material comprised 34 different strains (Tab. 1), assortable into two main groups, namely, elect and prostrate. Three subdivisions were recognized in the first main group: (A) bush, (B) typica, and (C) intermediate. But the second stayed without any subdivision, and was designated as (D). When examined at the stage of fertilized eggs in the gynophore decidedly before the penetration into the ground, almost no explicit differences were observable among the strains, vaguely referable to 2∼4-grain group on the one hand and 2-grain one on the other. Remarkably enough, the maturity brought forth distinctions. Rate of maturity of one-grain pod stood up in order: B>A>C>D (Fig. 1). Abnormality due to delayed or retarded development came out as A>C>D>B (Fig. 2). Empty-pod rate turned out to be C>A>D>B (Fig. 3).View full abstractDownload PDF (407K) -
Susumu MIZUNO1960 Volume 29 Issue 1 Pages 169-171
Published: September 01, 1960
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSIn order to find out the factors affecting peanut fruit filling, some experiments were conducted concering the relation between the calcium absorption by the fruit and its carbohydrate contentes. The results of experiments were as follows: 1. Ca45 supplied on one side of the plant could scarcely be detected on the opposite side of the same plant. Labeled calcium was found to be translocated from the vegetative tissues to the fruiting organs when it was not applied to the fruiting zone where the gynophores reach, while the translocation was not proved when labeled Ca was added in that zone. 2. The most benefical period for supplying calcium was found to be from 10 days to 30 days after the gynophores had reached the sand. Much calcium supplied in other periods was absolutely irrelevant to the normal seed development. 3. There was a high correlation between carbohydrate and calcium contents in pod at the growing stages. Contents of reducing and non-reducing sugar in calcium supplied shells were always higher than those in calcium deficient ones, but starch contents were high even in calcium deficient shells. On the other hand, the correlation between carbohydrates and calcium was not recoginized in the growing stage of seed.View full abstractDownload PDF (449K) -
Masahiko UENO, Kiyoshi YOSHIHARA, Sukeo KAWANASE1960 Volume 29 Issue 1 Pages 172-174
Published: September 01, 1960
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe influence of three cutting treatments (one, four and six times a year) on the sod-binding of the orchard grass sward was studied. The sward was established in 1957 and the total green yields of 1C, 4C, and 6C in 1959 were 130.1, 207.3, and 192.1 kg. per are respectively. (Table 1) By the autumn in 1959 the frequently cut sward had considerably more plants and tillers per unit area. (Table 2). As a result of these changes in plant density, the root weight of the sward especially in the surface soil was increased (Table 3) and there was observed the sod-dinding in the surface soil by increasing the cutting frequency. (Fig. 2) But respiration and NO3-N absorption of roots in the surface soil decreased by increasing the cutting frequency. (Table 4) The physical condition of the soil was changed by the sod-binding. Air per cent in the surface soil decreased and water per cent increased, so soil pore-space in the surface soil had a tendency to decrease as the sod-bound formed. (Table 5) These changes in physical conditions of the surface soil caused the retard of the water infiltration into the soil (Table 6) and of the root penetration of some reseeded legumes. (Table 7) These unfavorable soil conditions such as the increase of soil compactness and the decrease of soil aeration were assumed main causes of decrease of the sward productivity. In August, the soil temperature of the sward was measured. Soil temperature of 6C was higher than 4C at 2 cm in depth but at 5 and 10 cm in depth, 4C was higher than 6C conversely. It was assumed that the sod-binding had a mulching effect. (Fig. 1) It was assumed that two following factors concenrned with the sod-binding. The one was the increase of plant density accompanied with the increase of the root mass in the surface soil and the other was the delay of the decomposition of dead root materials owing to the unfavorable circumstances of the soil physical conditions.View full abstractDownload PDF (691K) -
Sukeo KAWANASE, Toyoichi YAMADA, Masahiko UENO1960 Volume 29 Issue 1 Pages 175-176
Published: September 01, 1960
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSEffects of two different soils, Mineoka (m) and chiba (c), on the growth of ladino clover (L), red clover (R) and orchard grass (O) were investigated. It became clear that three species were more productive on m-soil which contained larger amount of available P2O5 and earthworms than volcanic c-soil. Legumes on c-soil severely suffered from summer depression, which caused the decrease of yield in the subsequent growing season. Legumes on m-soil produced greater weight of root than that on c-soil. Roots of legumes on m-soil showed higher respiration and decayed slowly than those on c-soil. Sod-bound of orchard grass was formed on c-soil but not formed on m-soil.View full abstractDownload PDF (562K) -
Masao HOSHINO, Fumie MATSUMOTO, Jugo IKEDA1960 Volume 29 Issue 1 Pages 177-178
Published: September 01, 1960
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSExperiments were made on 1) the seasonal variation of moisture content of stored seeds, 2) relationship between water absorption speed and percentage of germination, and 3) relationship between seed size and longevity., and the following facts were disclosed. 1. The moisture content of the seed of Lespedeza stiputacea varies approximately with the change of atmospheric humidity. The moisture variation in the hard seeds (selected by the method of specific gravity using K2CO3 solution of specific gravity of 1.318) was smaller than that of the normal seeds. The seasonal variation in seed weight of the normal seed (15% rise in July from the figure in March) was larger than that of the hard seed. In wild soybean, the same relationship exists between hard seed and scarified seed, i.e., the latter had much greater seasonal variation of moisture content than the former. 2. Among the wild soybean seeds stored for three years, those of higher water absorption speed were lower in germination percentage. Of the seeds absorbing water in 2 hrs., only a small fraction germinated. More than 50% of those absorbing water in 2∼4 hrs. germinated. More than 90% of those absorbing water in 4∼120 hrs. germinated. The hard seeds left were scarified and almost of all seeds germinated. 3. With wild soybean, excepting the extremely small (weinghing less than 10 mg) seeds the smaller the seed size, the longer the longevity was. This may be attributable to the fact that more hard seeds are found in smaller seeds.View full abstractDownload PDF (395K) -
Kiyoshi YOSHIHARA, Masahiko UENO, Sukeo KAWANASE, Tadaatsu OKADA, Masa ...1960 Volume 29 Issue 1 Pages 179-181
Published: September 01, 1960
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSAuthors compared the growth of Ladino clover and orchard grass grown separately and alone. The experiment was laid out in split plot with four replication. All plots were fertilized equally with 90 kg superphosphate and 24 kg potassium sulphate per 10a a year, except nitrogen which was given as the following design. [table] Following results were obtained. 1. The green yield of both (L) and (M) were higher than that of (G). 2. Application of ammonium sulphate increased the yield of (G) but decreased that of (L). 3. At (L) the contents of total-N and NO3-N of the soil increased and pH of the soil decreased. 4. (L) was invaded gradually by weeds year by year and was overwhelmed completely in late summer in the third growing season. It was assumed that the circumstances turned unfavorable to legume rather than grass owing to some factors such as N accumulation in the soil, the decrease of pH, high temperature with severe drought in summer season. 5. Sod-bound was formed substancially in the soil of the not-nofertilized lot of (G) but not in that of (M). Sod-bound formation in the sward was considered one factor for the decrease of herbage productivity. Authors assumed that mixed seeding of grasses and legumes was effective in order to maintain the sward in good condition from the view point of preventing sod-bound formation.View full abstractDownload PDF (542K) -
Yasunao NISHIYAMA, Takashi TAGAWA1960 Volume 29 Issue 1 Pages 182-186
Published: September 01, 1960
Released on J-STAGE: February 14, 2008
JOURNAL FREE ACCESSThe present investigation was undertaken to obtain some information on the mechanism of the dormancy of potato tubers. To do this, a respiratory system which arises newly at the termination of dormancy requiring high pO2 for its activity, and the factors which cause the change of such respiratory system, were studied. Potato varieties of Irish Cobbler, D-805, Piuka-Beni, and Norin No. 1 infected with witches broom virus were used as materials. The results obtained may be summarized as follows; 1. Both from the nature of requiring relatively high pO2, and from the inhibition of O2 uptake of potato slices by 5% pO2, and acriflavine, it is reasonable to suppose that this respiratory system may be related to flavoprotein oxidase. 2. Respiratory system in potato tubers after the termination of dormancy was very similar to that of the washing old Slices which was reported by Levy and Schade (1948) and Thimann, Yocum and Hakett (1954). 3. The acidic inhibitor obtained from the dormant tubers suppressed the occurrence of a new respiratory system in washing old slices which requires the supply of high pO2. 4. Gibberellin or glutathione played an antagonistic role against the action of this acidic inhibitor. 5. When the tissue cylinders with apical buds obtained from potato tubers were washed with water for 4 days, the sprouting of the apical buds was much accelerated. This fact may be due to the disappearance of some substance from the tissue by elution, of which presence in the tissue may retard the sprouting of bud. 6. The tubers which were infected with witches' broom virus, lose their dormancies and could sprout any time. The natural gibberellin contents in such tubers were higher than those in healthy tubers. 7. Judging from the facts described above, therefore, the dormancy of the potato tubers may be controled by antagonistic actions between acidic inhibitor and gibberellin or glutathione contained in potato tubers, which in turn related to the change of respiratory system of tubers.View full abstractDownload PDF (756K)