• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.37 no.4
• /
• pp.329-334
• /
• 1992

In order to obtain basic informations on establishment of culture system for Cassia tora L. in the southern part of Korea, under vinyl mulching and non mulching conditions, the characters of growth and yield following the difference of fertilization quantity were investigated. All characters, stem length, stem diameter, number of branches, number of pods per plant, pod length, and number of grains per pod, etc., were excellent under the vinyl mulching condition, and of these growth characters, stem diameter, number of pods per plant, and number of grains per pod, etc. were most excellent in the district of N-P$_2$O$_{5}$-K$_2$O=8-6-6Kg /10a. Weight of 1000 grains and seed yield were also high under the vinyl mulching condition, and starting form the district of fertilization quantity N- P$_2$O$_{5}$-K$_2$O=8-6-6Kg /10a, the districts of increasing or decreasing fertilizer tended to be less yield. Also under the vinyl mulching and non mulching, the dispersive analyses of useful characters following the difference of fertilization quantity, were acknowledged to be worth of attention.

• Korean Journal of Organic Agriculture
• /
• v.7 no.1
• /
• pp.79-90
• /
• 1998

This study was conducted to effect promotion of fall potato growth in the place which green manual crops had been previously cultivated, crushed and tilled and polyethylene transparent vinyl had been mulched from Aug. 5 to Aug. 29 in 1997. The maximum temperature of below-ground at the depth of 10cm was $42^{\circ}C$ during the mulching period, and the pH and the organic compound content of soil was very increased by the cultivation of green manual crops and the mulching of polyethylene transparent vinyl. The total yields of green manual crops which had been previously cultivated were as the following orders; the hybrid of sudan grass, soybean, alfalfa, otherwise, fresh weight of stems and the tuber yield of fall potato were significantly affected in the plot of soybean + fall potato after the soil solarization with the mulching. As these results, it was possible to improve crops growth and to sterilize soil by the mulching treatment of polyethylene vinyl after cultivation of green manual crops during the high temperature of the summer season.

• Korean Journal of Plant Resources
• /
• v.9 no.3
• /
• pp.249-253
• /
• 1996

The study was conducted to investigate the effect of the culture with trickle with trickle irrigation in transparent vinyl house on the seed productivity of onion. Growth, number o tiller and leavers, plant height, leaf sheath length, flowering rate, diameter of flower wheel, number of little flower per flower stalk and fertilization rate are best in the case of the seed production under the culture with trickle irrigation in transparent vinyl mulching house, catch in the rain with vinyl from February to March, so it is found that it is appropriate to plant the onion mother bulb under the culture with trickle irrigation in transparent vinyl mulching house, catch in the rain with vinyl from February to March in the Southern areas of Korea.

• Korean Journal of Plant Resources
• /
• v.9 no.1
• /
• pp.63-69
• /
• 1996

The experiment was conducted to reduce the labor and production cost with the labor save of harvest in cultivating the onion using the machine and the results are as follows. On labor saving effect in transparent vinyl mulching, digging working hours per 10a in the case of using tractor are 55 min., fixing + turning time is 11 min.,the time of harvest is 66 min, digging working hours using cultivator are 90 min. and fixing + turning time is 9 min., but the time of hand harvesting is 693 min and 41 sec. and in digging labor saving effect, tractor shows 90% in the harvesting period and harvest by cultivator 86%. On nonmulching cases, the harvest by tractor takes 44 min. and that by cultivator does 75 min, and digging labor saving effect shows 93.6% in the tractor harvest and 89% in the cultivator harvest. Therefore, on the operation efficiency per hour, in the case of tractor with digger vinyl mulching and nonmulching show $0.091\sim0.136ha$ and in the case of cultivator with digger-both show $0.061\sim0.08ha$, but in the case of hand harvest, vinyl mulching and nonmulching are $0.008\sim0.009ha$, so in the mechanized harvest of onion, the harvest by tractor with digger is the best. On the cost and labor save for harvesting the onion with labor saving effect, tractor shows 19 hours and 26min./10a in vinyl mulching and 18 hours and 54min./10a in nonmulching, so it shows the short hours for harvesting. And labor saving effect shows 37% in comparison with 29 hours and 49 min. $\sim30$ hours and 38 min.($110,587\sim113,925won$) of the hand harvest, so the cost was reduced to $69,525\sim72,225won$. On the cultivator with diggers, vinyl mulching takes 19 hours and 49 min and nonmulching 20 hours and 2 min., so the labor saving effect and cost were reduced to $32\sim36%$($73,087\sim75,075$ won) in comparison with the hand harvest.

• Korean Journal of Soil Science and Fertilizer
• /
• v.22 no.1
• /
• pp.25-30
• /
• 1989

A field experiment was carried out to evaluate the effects of zeolite application and vinyl mulching on the changes in soil physico-chemical properties and yield of silage corn on the newly-reclaimed sloped land. Corn (Suweon 19) was cultivated under 4 application levels of zeolite, 0, 500, 1,000 and 1,500 kg/10a, with and without vinyl mulching, and various soil physico-chemical properties and corn growth were investigated. Soil physical properties, such as cation exchange capacity and water stable aggregates, were increased, but soil hardness was decreased by zeolite application. The porosity and temperature of soil were increased greatly by vinyl mulching. The differences between daily maximum and minimum soil temperature were large in beginning stages of crop growth, but those were decreased to $2^{\circ}C$ after mid-August. Zeolite application enhanced the plant growth and increased yields by 3-37% compare to control, also vinyl mulching brought to increase the corn yields by 17-23%. Water stable aggregates was correlated with soil hardness, and silage yields were highly correlated with porosity, air phase and water stable aggregates.

• Journal of Korea Technical Association of The Pulp and Paper Industry
• /
• v.45 no.6
• /
• pp.64-71
• /
• 2013

The biodegradable mulching paper could be applied for the environmental friendly agriculture as an alternative to the current vinyl mulching. In order to increase the usability of the mulching paper, the effects of the addition of various inorganic materials on the functionality of the mulching paper were evaluated in terms of practical benefits. The blend of carbonized rice husk powder and perlite resulted in the higher value in the air permeability of the mulching paper, which would be important for the health of plant root. The heat conservative of the mulching paper could be improved by adding the bottom ash or the fly ash because of the pore structure of the ashes. The pH of acidic soil could be neutralized by using the mulching paper containing paper-mill sludge ash or fly ash. The various results showed the addition of the inorganic materials could improve the functional properties of the mulching paper.

• Magazine of the Korean Society of Agricultural Engineers
• /
• v.27 no.1
• /
• pp.62-70
• /
• 1985

The purpose of this study is to investigate the basic data such the total, the daily maximum, and the peak stage of consumptive use of water and also the soil moisture extraction pattern for irrigation plan of tobacco during the growing period. The plots at which this study was conducted are divided into three fertilization levels of 30g, 60g, and 90g. Each block for three levels is divided as vinyl mulching and irrigation plot, vinyl mulching and nonirrigation plot, and nonmulching and irrigation plot. The results obtained are summarized as follows: 1. The evapotranspiration amount of mulching-irrigation plots are similar to that of mulching-nonirrigation plots. While, the evapotranspiration amount of mulching plots are different obviousely from that of nonmulching plots. Therefore, a significance was recognized between the mulching plots and the nonmulching plots. 2. The amount of evapotranspiration in case of 60g and 90g fertilization level was larger than that of 30g. But the 60g plots and the 90g plots showed little differences. 3. In the total amount of evapotranspiration for each of the experimental plots during the growing period, nonmulching-irrigation plot showed the largest value of 332.9mm, second the mulching-irrigation plot, 284. 9mm, and the mulching-nonirrigation plot, the smallest as 255. 9mm. 4. In the monthly average amount of evapotranspiration for each of the treatment plots, the mulching-irrigation the mulching-nonirrigation, and the nonmulching-irrigation plot showed 3. 6mm, 3. 2mm and 4. 2mm respectively. The daily maximum amount of evapotranspiration showed 5. 1mm, 4. 5mm, and 6.4mm for the mulching-irrigation, the mulching-nonirrigationl, and the nonmulching-irrigation plot respectively. 5. It was confirmed that the higher correlationship exists between the weight of dried leaves and the amount of evapotranspiration, and between the weight of dried leaves and the coefficient of evapotranspiration with the function of logarithms. The coefficient of evapotranspiration have a tendency to increase in proportion to the leaf area index. 6. The maximum coefficient of evapotranspration and the largest leaf area index showed 1. 45 and 5.5 respectively. The stage appeared maximum values was assumed to be before and after flowering. 7. The soil moisture extraction pattern has changed by the depth of root zone for the tobacco's growing. The soil moisture extraction influenced on the 20cm depth of soil after 15 days passed, the 30cm depth after 25 days passed and the whole root zone after 45 days passed from planting. It was shown in the only mulching-irrigation plot after S5days passed from planting that the rate of soil moisture extraction of 20cm layer was larger than that of 10cm layer.

• Korean Journal of Soil Science and Fertilizer
• /
• v.21 no.1
• /
• pp.31-40
• /
• 1988

This study was focussed to compare the concentrations of the volatile oil components of flue-cured tobacco grown by two types of nitrogen-ammonium and nitrate-under vinyl mulching. The results were summarized as follows; 1. The content of nicotine was lower and reducing sugars degraded from starch was higher content in $NO_3-N$ application than $NH_4-N$. 2. The concentrations of furfural, benzyl alcohol, and phenethyl alcohol in the cured leaf were not different between $NH_4-N$ and $NO_3-N$ treatments. 3. Some of the important flavour components-linalool, solanone, damascenone, neophytadiene, and oxyolanone + megastigmatriene-one - had much higher concentrations in $NO_3-N$ than $NH_4-N$ application. 4. In conclusion, nitrate nitrogen was more favorable to decrease nicotine and to increase some important flavour components of cured leaf than ammonium nitrogen.

• Proceedings of the Korean Society of Crop Science Conference
• /
• 1992.05a
• /
• pp.116-117
• /
• 1992

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.38 no.3
• /
• pp.208-212
• /
• 1993

Since ramie suckers distribute soil surface layer within 10cm depth, some of them are dead from low soil temperature in winter. An experiment was conducted to investigate the effects of various mulching methods on safe overwintering of sucker at three or four years old, fully-grown ramie plots. The sprouting dates of ramie was March 28 in transparent vinyl mulching(TPEF), April 1 in transparent vinyl mulching over cover of straw, manure or rice hull at the amount of 500kg /10a (CM), and April 6 in black vinyl mulching(BDEF). These treatments showed earlier sprouting date from 9 to 18 days than the conventional mulching with 1000 kg straw /10a the sprouting date of which was April 15. TPEF treatment showed the earliest but ununiform sprouting. In contrast, sprouts in CM treatment was uniform but emerged somewhat later compared with the treatment of TPEF. The number of stems per unit area increased 50 percent more in TPEF, and 35 to 39 percent more in CM than the treatment of conventional mulching.