• Journal of Bio-Environment Control
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• v.32 no.2
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• pp.172-180
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• 2023

This study was carried out to determine the sprouting period of early and mid-season varieties, which includes 'Atlantic', 'Chubaek', and 'Superior', during the summer storage period in a semi-underground warehouse without cooling system. And also it was investigated the effect of chlorpropham [Propan-2-yl N-(3-chlorophenyl)carbamate, CIPC] treatment on the sprouting inhibition for the varieties. This study was conducted to figure out a sprout inhibitory effect when CIPC was applied to 1kg of the potato tubers at concentrations of 10 mg and 20 mg which are lower than the treatment concentrations of ca 30 mg prescribed by the positive list system (PLS). The internal temperature of the warehouse used in this experiment was lowered by 5℃ or more than the outside temperature. The difference between the lowest and highest temperature during the experiment throughout the day was 5℃. It showed the effect of reducing to 1/2 of the difference in outdoor temperature. As for the sprouting of potatoes, the extremely early variety 'Chubaek' sprouts appeared at the 6th week of storage of control and it was the fastest sprouting potato among the control groups of the varieties. Sprouting began to appear in the Superior at the 6th week of storage, while the 'Atlantic' sprouted at the 8th week of storage. The appearance of sprouts was suppressed in all treatment groups of 'Atlantic' and 'Superior' varieties in CIPC treatments. Sprouts were observed in all treatment groups of 'Chubaek' after the 7th week, but the elongations of the sprouts in tubers were completely inhibited until the 8th week of storage. 'Atlantic' and 'Superior' seemed to have a sprouting inhibitory effect even with a low CIPC concentration of 10 mg·kg^-1, with the exception of extremely early variety 'Chubaek' that breaks out of the dormancy quickly. Although weight loss occurred continuously during storage, it was minor loss of 0.7-1.6%. There was no consistent trend for changes of the loss in the varieties and CIPC treatments. Most common pathological disorder was the dry rot during the experiment, but only few were affected. The use of the tubers treated at 18℃ and 90% RH for 10 days and the rack of refrigeration system which lead to lack of convection seemed to have suppressed the spread of pathogens.

• Magazine of the Korean Society of Agricultural Engineers
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• v.12 no.2
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• pp.1960-1964
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• 1970

Underdrainage has been studied by using PVC suction pipes in the low and wet Paddy field: Fist, three test plot and three control plots were set and drainage methods and Soil tempratures in the test plots have been examined. The experiment was conducted making use of the 'NONG-RIM No, 4'(Wheat) 'DOWON' (rice barley), a recommended variety. Test period was from September, to December, 1969. The experimental methodsand results obtained through this experimontation are as follows: 1) Ground water level in the test plot goes down by 34 cm. 2) In sprouting, control plot is earlier than test plot by three days. 3) The rate of sprouting is equal.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.8 no.1
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• pp.121-127
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• 1970

In order to find out the suitable periods and methods of seeding and the suitable seed bed location of fall grown potatoes in Seoul, this experiment was conducted at College of Agriculture, Korea University from 2nd July to 30th September in 1970. Experimental results using Irish cobbler, our leading variety, were as follows; 1. The suitable seeding period of fall grown potatoes seems about 21st July. 2. The direct seeding method is available where the upland farm is well drainage. 3. The sprouting in the field conditions forcing makes healthy stands of seed potatoes.

• Food Science and Preservation
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• v.7 no.1
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• pp.19-22
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• 2000

This study was carried out investigate the storability of onions on calcium spraying, after cutting foliage, 6 different treatemnt , the dilution spraying of calcium nitrate 9 3%, 6%) , calcium carbonate(3%, 6%), dust scattering and the controls were evaluated for rotting, sprouting, healthy bulb and total weight loss ratio during storage. Rotting ratio on the dilution spraying of 6% calcium carbonate was lower than that of the control after 4 months storage by 16.7%. Sprouting and total weight loss were decreased in the dilution spraying of 6% calcium carbonate.

• Korean journal of food and cookery science
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• v.9 no.1
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• pp.30-32
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• 1993

This study was conducted to characterize quality of the soybean seed harvested in 1989, 1990 and 1991 each and stored in the refrigerator. Storage time did not affect the phytate and total sugar content, whereas longer storage reduced nitrogen solubility index (NSI). There was no difference in amylogram viscosity characteristics of soybean seeds harvested in 1989 and 1990, which was lower than those in 1991. The production yield of soybean sprout and total sprouting rate of soybean seeds harvested in 1989 were 334.8% and 57.4%, respectively, which were lower than those in 1990 and 1991.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2002.11b
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• pp.40-40
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• 2002

• Proceedings of the Korean Society of Crop Science Conference
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• 1990.05a
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• pp.58-59
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• 1990

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 2000.10a
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• pp.77-80
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• 2000

• KOREAN JOURNAL OF CROP SCIENCE
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• v.47 no.5
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• pp.356-360
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• 2002

The seedlings of yacon (Polymnia sonchifolia Poeppig ＆ Endlicher), which were cuttings, plug seedling (PS), crown bud before sprouting (CBBS), crown bud after sprouting (CBAS), and divided seedling after budding (DSAB) were planted at 70$\times$50 cm planting distance on ridge; that was interow spacingintrarow spacing, and about 28,500$\pm$71 plants/ha. CBBS didn't need work and equipment to raise seedlings. PS and DSAB grew taller to 140.5 and 143.3cm, respectively, than others at 150 days after planting. In the changes of plant height, PS and DSAB showed taller than others during growth period, cuttings, CBBS, and CBAS grew rapidly in middle growth stage. Excepting main stem and petiole length, other characters were significant for seedling. Fresh weights were different among seedlings. Even though the yield of plants grown from CBAS and CBBS were lower with 34.7 and 36.4 ton/ha, respectively, than 3.6 ton/ha of DSAB; its yield index were over 95%, hence, those of plants grown from cutting and PS were lower with 73 and 87%, respectively. The ratio of tuberous roots over 200g to total tuberous roots per plant was the highest from DSAB. Most of tuberous roots were under 200g per tuberous root from cuttings. CBBS, CBAS, and DSAB are suitable to use seedlings for high yield of yacono. Yacon plant by DSAB much produced tuberous root of over 200g.

• Journal of Bio-Environment Control
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• v.19 no.4
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• pp.377-381
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• 2010

This study was carried out to access the stauts of pyruvic acid and sugars in onion bulbs during storage at room temperature. Pyruvic acid content remained in a steady state until 3 months of storage. However the pyruvic acid content gradually increased as the onions started to root, and rapidly increased after sprouting. There was no difference in dry matter contents during storage.e. Sucrose content increased as storage duration extended, and then gradually decreased right after the onions started to sprout. Fructose content gradually decreased after 45 days of storage, and remained in a steady state after sprouting. Glucose content had a tendency to increase as storage duration extended. Pyruvic acid/total sugar (PA/TS) ratio decreased after 1 month of storage, and then increased after 135 days, and was 83% higher at 150 days of storage than at harvest. Sweetness gradually decreased until 1 month of storage, but thereafter remained steady. Therefore it is desirable that pyruvic acid analysis for sweet onion selection should be conducted before breaking the dormancy.