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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
KOREAN JOURNAL OF CROP SCIENCE
Journal Basic Information
Journal DOI :
The Korean Society of Crop Science
Editor in Chief :
Lee, Sang Chul
Volume & Issues
Volume 22, Issue 2 - Dec 1977
Volume 22, Issue 1 - Jun 1977
Selecting the target year
Nitrogen Responses of Rice Varieties on Grain Yield and Other Agronomic Characters
;Jae-Young Cho;Jong-Hoon Lee;
KOREAN JOURNAL OF CROP SCIENCE, volume 22, issue 2, 1977, Pages 1~17
Nitrogen responses to yield and other agronomic characters were studied using four rice varieties, Tongil, Jinheung, Milyang 23, and Yushin, at six nitrogen levels, 0, 10, 15, 20, 25 and 30kg/10a, in a silt loam soil at the Crop Experiment Station, Suweon, Korea, in 1976. Grain yields of Milyang 23 and Tongil were much higher than those of Jinheung and Yushin at high nitrogen levels (15-30kg/10a). Optimum nitrogen levels of the rice varieties, Tongil, Milyng 23, Yushin, and Jinheung, estimated by intersecting straight line, were 22, 19, 19, and 12kg/10a, respectively. Morpshological characters, dry matter production before and after heading, and yield components were dicussed in relation to the nitrogen responsivenees of the rice varieties. In addition, relationships between yield, yield components, and other agronomic characters were discussed to obtain some informations for higher rice yield.
Effects of Temperature and Dormancy Breaking on Germination of Newly Developed Rice Varieties
;Hyun-Ok Choi;Jong-Hoon Lee;Moon-Hee Lee;
KOREAN JOURNAL OF CROP SCIENCE, volume 22, issue 2, 1977, Pages 18~22
Germination ability of a japonica and 15 indica
japonica varieties was tested at day/night tempuratures of 25/2
. Germination ability of a japonica variety, "Jinheung" and two indican
japonica varieties. "Suweon ＃251" and "Suweon ＃278" was greater than that of other indica
japonica varieties tested. Germination pattern of varieties was made into 4 groups.ieties was made into 4 groups.
Studies on the Low Temperature Injury at Seedling Stages of Newly Developed Rice Varieties
;Hyun-Ok Choi;Jong-Hoon Lee;Moon-Hee Lee;
KOREAN JOURNAL OF CROP SCIENCE, volume 22, issue 2, 1977, Pages 23~26
In order to test cold tolerance of rice plants 16 varieties were treated at day/night temperature of 10/5
at the 2nd, 4th, and 6th leaf stages. Indica
japonica varieties were more sensitive to low temperature than a japonica variety. Among indica
japonica varieties, "Tongil", "Suweon ＃251", and "Suweon ＃277" were less sensitive to low temperature compared to other indica
japonica varieties tested. The 4th leaf stage was more sensitive to low temperature than 2nd and 6th leaf stages. than 2nd and 6th leaf stages.
Rice Seedling Establishment for Machine Transplanting I. Effects of Seed Bed Soils and Soil pH on the physiological Disorders of Seedlings and Their Control
Yong-Dea Yun ; Hyun-Ok Choi ; Jong-Hoon Lee ;
KOREAN JOURNAL OF CROP SCIENCE, volume 22, issue 2, 1977, Pages 27~31
Experiments were conducted to investigate the effects of seed bed soils and soil pH on the rice growth and control of seedling rots. A 2:1 ratio mixture of clay loam and compost resulted in the best seedling growth and quality among the soils used. At soil pH between 4 and 5. no seedling rots occurred and plant growth was normal. At soil pH above 6, seedling rots occurred and characteristics of seedings was poor. Tachiga ren application before seeding or immediately after seeding reduced seedling rots significantly at the high soil pH.
Rice Seedling Establishment for Machine Transplanting II. Effects of Sprouting and Seed Bed Temperature on the Seedling Characteristics
Yong-Dea Yun ; Hyun-Ok Choi ; Jong-Hoon Lee ;
KOREAN JOURNAL OF CROP SCIENCE, volume 22, issue 2, 1977, Pages 32~36
Experiments were conducted to know the effects of seed bed temperatures on the sprouting of seeds and seedling growth in the phytotron and field. Sprouting of seeds were most uniform when seed bed was stored under the straw and vinyl mulching for 48 hours after seed bed temperature increased up to 3
by the sun. In the phytotron, optimum temperature was 32
for sprouting and day/night temperature of 25/30 and 20/15
for greening and hardening of seedlings, respectively. In the field, the best results were obtained under the conditions of sprouting in the seedling chamber heated by electricity and greening the hardening under the double vinyl tunnel in the upland nusery bed.
Studies on the Effect of Zeolite Application on Rice Growth and yield in Tidal Land
KOREAN JOURNAL OF CROP SCIENCE, volume 22, issue 2, 1977, Pages 37~41
Zeolite was applied of the tidal land and its effect on growth and yield of the two rice varieties, Yushin and Jinheung, was studied. The salinity of the zeolite treated soil was lower than that of the control. The effect of zeolite on growth of rice was appeared at the maximum tillering stage. The remarkable effect of zeolite on grain yield appeared in the variety Yushin, an indiea type. The amount of 600kg/10a was recognized to be an optimum amountd of the zeolite application in the tidal land.
Influence of Nitrogen and Potassium Split Application on the Physiological Characteristics of Paddy Rice in Sandy Gravel Soil
KOREAN JOURNAL OF CROP SCIENCE, volume 22, issue 2, 1977, Pages 42~47
Experiment was conducted to find out the influence of nitrogen and potassium split application on the yield and physiology of rice plants in a sandy-gravel soil. Nitrogen and potassium mixed application, nitrogen split application, and potassium split application increased yield of rice by 22, 20, and 18%, respectively, compared to conventional fertilizer application. Nitrogen split application increased chlorophyll content and potassium split application increased root activity. Concentration of silica, magnesium, and calcium was increased by the mixed split application of nitrogen and potassium.
Influence of Various Films on the Growth of Rice Seedlings
KOREAN JOURNAL OF CROP SCIENCE, volume 22, issue 2, 1977, Pages 48~51
In order to find out the effects of light quality on seedling growth. 6 rice varieties were grown under the 7 different films for 30 days. Under the blue films (PVC-B20 and PVC-UVC 400-B15), chlorophyll content and nitrogen concentration were higher than those under the other films. Plant height and third leaf sheath growth were suppressed under the blue films, while stimulated under the red film.
Studies on the Improvement of Grain and Eating Quality of Barley 2. The Varietal Difference of Crease Development and It′s Relation to Grain Development
Hong-Suk Lee ;
KOREAN JOURNAL OF CROP SCIENCE, volume 22, issue 2, 1977, Pages 52~58
For the fundamental studies on the improvement of grain and eating quality of barley. grain and crease development were investigated with 44 cultivars. The varietal differences in the length, width, thickness. weight and crease development of barley grains were significant. There were significant correlations between grain development and development of crease in many cases.
Influences of Environmental Factors on Wheat Quality I. Relationship between Grain Yield and Quality of the Wheat as related to Cultivated Locations
KOREAN JOURNAL OF CROP SCIENCE, volume 22, issue 2, 1977, Pages 59~64
The relationship between grain yield. protein content and sedimentation value in wheat were studied using 9 varieties cultivated at 8 locations in Korea. The grain yields of wheat varied widely, according to varieties and locations. Negative correlations between grain yield and protein content, and grain yield and sedimentation value were observed, while a positive correlation between protein content and sedimentation value was observed. Specific sedimentation values of soft wheats were below 4, while those of hard wheats were above 5. The intermediate varieties had sedimentation values of 4-5. This showed that specific sedimentation values could be used as a criterion in the classification of wheat quality.
Influences of Environmental Factors on Wheat Quality II. Effects of Regional Climatic Factors on Protein Content and Sedimentation Value of Wheat Flour
Sung-Ho Bea ; Chang-Hwan Cho ;
KOREAN JOURNAL OF CROP SCIENCE, volume 22, issue 2, 1977, Pages 65~70
The effects of regional climatic factors on wheat quality were discussed. The most important climatic factor on wheat quality during the ripening period of wheat was air temperature during the ripening period of wheat. The protein content and sedimentation value were higher in northern parts of Korea compared to southern parts in Korea. The varietal effects of ripening temperature on protein content and sedimentation value of wheat were varied in nine tested varieties.
8-Parents Diallel Cross Analysis on Heading Date of Barley
Chung-Tae Young ;
KOREAN JOURNAL OF CROP SCIENCE, volume 22, issue 2, 1977, Pages 71~79
In order to obtain the basic information on the response of different day-length to heading date and on the inheritance of heading date of barley varieties. the 8 parents F
diallel crosses were tested with 4 different day-length. Varietal differences in photo-sensitivity were observed and Haganemugi was the most photo-insensitive variety. The inheritance of earliness were appeared to be partial dominance or partial ressesive and the inheritance of photo-insensitivity over photo-sensitivity were controlled by the single ressesive factor.
Studies on the Wet-injury Resistance of Wheat and Barley Varieties III. Effect of Various Moisture Levels on the Top and Root Growth of Barley Crop
Hyung-Soo Suh ;
KOREAN JOURNAL OF CROP SCIENCE, volume 22, issue 2, 1977, Pages 80~92
This experiment investigated the effect of various moisture levels on the top and root growth of barley and its yield. Resistant varieties to excess moisture injury shortened plant height, but tillered more, having creeping plant type compared with ordinary one, and greater portion of root of this varieties occured at the deeper soil depths with longer root length. However, susceptible one to excess moisture injury showed an inversed trend when compared with the untreated one. Oversaturated treatment compared with the untreated increased a little bit soil temperature and Eh of soil. Increased root activity and increased yield were obtained with resistant varieties compared with the untreated. Lower root activity and less yield than those of the untreated were observed in both extreme treatments. Yield reduction in both the extreme treatments was mainly due to reduction of tiller number, grain number and 1, 000-grain weight. Highest yield reduction was marked at the stage of internode elongation in the oversaturated and at the booting stage in the overdried treatment.
Screening for Soybean Pod Borer(Grapholitha glycinivorella Matsumura) Resistant Lines in Korean. Native Soybean Collections
Shin-Han Kwon ;
KOREAN JOURNAL OF CROP SCIENCE, volume 22, issue 2, 1977, Pages 93~97
The rate of damaged soybean seeds by pod borer averaged 7.4% with the range of 1.2%-21.3% and tended to be higher in the lines with hairy pods comparing to those with hairless pods. The susceptibility of pod borer was negatively correlated with the pod setting date. while was not significantly affected by the weather conditions during the pod setting period.
Effects of Different Planting on Plant Height, Number of Leaves, Flowering and Yield on Sunflower (Helianthus annuus. L.)
Kwang-He Kang ; Eun-Woong Lee ;
KOREAN JOURNAL OF CROP SCIENCE, volume 22, issue 2, 1977, Pages 98~103
To layout the pattern in ecological and productive traits of sunflower (Helianthus annuus L.), two cultivars, Peredovic and Gunpo-local, were grown at 6 planting dates from May 15 to July 25 by 20 day intervals. Delaying of planting dates, Cv. Peredovic showed less variation in days to reach the head-visible stage than Cv. Gunpo-local. and two varieties are different in photosensitivity. Plant height and stem diameter and number of leaves of Cv. Gunpo-local were greater than those of Cv. Peredovic at the early planting, but the differences were decreased as planting were delayed. Cv. Peredovic yielded 158kg achences per 10are relatively from the May 5's planting. However delaying of planting dates after July 5, there was serious reduction in the yield.
Studies on Ecological Variation and the Yielding Capacity of "Sunflower" Varieties
;Hyun-Ok Choi;Ik-Sang Yu;
KOREAN JOURNAL OF CROP SCIENCE, volume 22, issue 2, 1977, Pages 104~111
This study was carried out in order to know the ecological variation and yield factors under the Korea weater with the 25 sunflower varieties which have been introduced from abroad recently. As the results of this of this study we can conclude that high yield and high oil content varieties seemed to have the short period comparatively from planting to head visible and to have long period from flowering to maturity.
A Study on Cultivation of Stevia rebaudiana Bertoni M. as an Introduced Sweetness Resource Plant in Jeju-do
KOREAN JOURNAL OF CROP SCIENCE, volume 22, issue 2, 1977, Pages 112~120
In Korea. the cultivating standard of stevia is not established yet. Because stevia is across-fertilizing plant. planting a cutting is its available propagation method. This study was made to know the effective propagation growth and adaptability of stevia in Jeju-do, according to the wintering effect and the planting density.
Effect of Particle Size of Granular Nitrofen (TOK G) on the Leaf Burning in Rice Plants
Jin-Gu Park ; Yong-Woong Kwon ;
KOREAN JOURNAL OF CROP SCIENCE, volume 22, issue 2, 1977, Pages 121~127
Leaf burning due to nitrofenapplication was characterized as brown color spot appearing on the leaf sheath and blade. The spots predominantly appeared around 5-7 cm high above soil surface regardless of different particle size, formulation, application method, or water level. Magnitude and frequency of burn spots increased somewhat as the granular size gets finer, by higher water level, or in transplanted rice compared to directly sown rice when applied at 7 leaf-stage, but there was no indication of increase in leaf burning due to clinging of floating dust to rice plant. When collections from local distributor's stock of TOK 7G, a granular formulation of nitrofen, were analyzed for particle size composition, 98.9% by weight ranged between 9 to 35 meshes, and only about 0.08% by weight was of particles finer than 100 mesh.