• Korean Journal of Organic Agriculture
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• v.25 no.1
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• pp.85-99
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• 2017

The study was compared for ability to supply macro-nutrients between time and height of mowing to establish alternate technique of a chemical fertilizer with 9-year old 'Niitaka' pear (Pyrus pyrifolia Nakai) trees in a pesticide-free orchard in 2009. Rye and hairy vetch were sown together during fall 2008. Four types of mowing time treatments were included; mowing on April 18+May 28, on April 28+June 8, on May 8+June 18, and on April 18+May 18+June 18. Mowing height treatment included mowing at $3{\pm}1cm$, $7{\pm}1cm$, and $13{\pm}1cm$ on April 18 or June 8. Mowing on May 8+June 18 increased the most dry weight of ground cover and vegetation to 14,480 kg per ha among the mowing time treatments, resulting in the greatest production of T-N (total nitrogen; 292 kg) and K (396 kg) per ha on the soil. Mowing at $7{\pm}1cm$ decreased the most dry weight of ground cover and vegetation to 11,970 kg per ha among the mowing height treatments, resulting in the lowest production of T-N (265 kg), P (111 kg) and K (333 kg) per ha in a soil. Ground cover treatments increased soil organic matter contents, regardless of mowing treatment methods.

• Asian Journal of Turfgrass Science
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• v.22 no.1
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• pp.49-56
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• 2008

This study was conducted to evaluate effect of liquid fertilizer contained medium of Lactobacillus confusa and Pichia anoala on growth of creeping bentgrass(Agrostis palustris Huds. CV. Pennlixs). By application method of liquid fertilizer, the experiment plot was designed as following; NF was non-fertilized treatment, control was applied with compound fertilizer and treatment 1(T-1), treatment 2(T-2) and treatment 3(T-3) were applied with compound fertilizer and liquid fertilizer solution diluted 500, 300 and 100 folds, respectively. The every treatments was arranged a randomized complete block with three replications. Compared with NF, leaf color index of control, T-1, T-2 and T-3 in creeping bentgrass was increased 7.4%, 7.5%, 77% and 7.2%, respectively and chlorophyll content of T-1, T-2 and T-3 in creeping bentgrass was increased 45.7%, 45.6%, 52.1% and 49.6%, respectively, and T-2 and T-3 was increased 4.4% and 2.7% more than control. Dry weight of T-1, T-2 and T-3 was increased 2.7%, 13.8% and 13.9% more than control, when compared to control. These results were found that turfgrass qualities and growth was improved in treatment applied to compound fertilizer and solution of liquid fertilizer diluted 300 folds.

• Korean Journal of Weed Science
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• v.31 no.2
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• pp.199-204
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• 2011

This experiment was carried out to investigate the growth responses of zoysiagrass (Zoysia japonica Steud.) as affected by prohexadione-calcium foliar application for the effective labour saving and cost down management in the lawn yard, field and golf course etc. The leaf growth of zoysiagrass treated with prohexadione-calcium one day after mowing was significantly slow compared to the untreated plot. And the effect was continued up to 50 days. The growth inhibition rate at the treated plot was 46 to 50% compared to untreated plot and the leaf widths treated with prohexadione-calcium were narrower than control plot. The change of leaf dry weight 10 days after prohexadione-calcium treated was significantly shown less speedy than untrated plot and the results were continued up to 40 days after application. The SPAD values of the leaf colour were increased in the treated plots and continued for 40 days more.

• Journal of Bio-Environment Control
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• v.21 no.3
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• pp.286-293
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• 2012

This study was initiated to find out the suitable perennial ground covers naturally grown in thirteen organic orchards in Chonnam Province as a organic nutrient source for maintaining annual fruit tree growth. The ground covers were observed in April, June, and August in the orchards. Agropyron tsukusinense and Panicum virgatum observed in April and June, respectively, produced the highest dry weight, which increased amounts of N, $P_2O_5$, and $K_2O$, mineralizing from the residue in the ground covers. The occurrence of perennial ground covers in August decreased compared to April and June. Amount of residue in mowed Agropyron tsukusinense and Panicum virgatum satisfied nutrient demand (N; 20 kg/10a, $P_2O_5$; 11 kg/10a, and $K_2O$; 19 kg/10a) to achieve the annual growth of twenty-year old fruit tree.