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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Soil Science and Fertilizer
Journal Basic Information
Journal DOI :
Korean Society of Soil Science and Fertilizer
Editor in Chief :
Volume & Issues
Volume 38, Issue 6 - Dec 2005
Volume 38, Issue 5 - Oct 2005
Volume 38, Issue 4 - Aug 2005
Volume 38, Issue 3 - Jun 2005
Volume 38, Issue 2 - Apr 2005
Volume 38, Issue 1 - Feb 2005
Selecting the target year
Effect of Biosolids on Heavy Metal Bioavailability and Organic Acid Production in Rhizosphere of Zea mays L.
Koo, Bon-Jun ; Chung, Doug-Young ;
Korean Journal of Soil Science and Fertilizer, volume 38, issue 4, 2005, Pages 173~179
A greenhouse experiment was conducted to evaluate the composition of organic acids on the bioavailability of heavy metals in the rhizosphere of corn (Zea mays L.) over 12 weeks after treatment of biosolids. After planting the plants were sampled at 12th week and analyzed for heavy metals in shoot and root and organic acids in the rhizosphere. Results showed that biomass yields of Zea mays L. grown on biosolids-treated media were significantly higher than those grown on standard media. The effect of biosolids on biomass yields of Zea mays L. was in order of Riverside
MWRDGC > Milorganite > Nu-earth > standard media. Metal uptake by Zea mays L. was closely related with the contents contained on biosolids treated. In the plot treated with Nu-earth the uptake of Cd and Zn by shoot was significantly higher than those at the plots treated with other biosolids. The uptake patterns of Cd and Zn by root were similar to those of shoot. The uptake of Cr and Ni was significantly higher with application of Nu-earth over other biosolids. In all cases, the major organic acids in the rhizoshpere were lactic, acetic, propionic, butyric, and oxalic acids. Other organic acids were glutaric and succinic and occasionally, pyruvic and tartaric acids were also found. And the organic acid compositions did not vary significantly with the treatments of biosolids. Butyric and acetic acids were distinctively dominant both in the standard and the biosolids treatments.
Isolation of Sulfur Oxidizing Bacteria from Different Ecological Niches
Anandham, Rangasamy ; Sridar, Ragupathy ; Nalayini, Periyakaruppan ; Madhaiyan, Munusamy ; Gandhi, Pandiyan Indira ; Choi, Kwan-Ho ; Sa, Tong-Min ;
Korean Journal of Soil Science and Fertilizer, volume 38, issue 4, 2005, Pages 180~187
Nine chemolithoautotrophic and 12 chemolithoheterotrophic sulfur oxidizing bacteria were isolated using enrichment technique in modified Starkey's medium. All isolates reduced pH of the growth medium through oxidation of elementai sulfur to sulfuric acid. Isolates utilized the thiosulfate as energy source except LCH. None of the isolates grew anaerobically and utilization of glucose was found only in chemolithoheterotrophic isolates SGA6 and JIG. In vitro sulfate production from elemental sulfur was found maximum for chemoiithoautotroph LCH (
) and least for chemolithoheterotroph JIG (
). The above tests suggested that all isolates belong to the member of Thiobacillus. For field inoculation of Thiobacillus, clay based pellet formulation was developed with the cell load of
of pellet. It is easy to handle by the farmers and more likely to lead to successful farming.
Solubilization of Rock Phosphates by Alginate Immobilized Cells of Pantoea agglomerans
Ryu, Jeoung-Hyun ; Madhaiyan, Munusamy ; Seshadri, Sundaram ; Sa, Tong-Min ;
Korean Journal of Soil Science and Fertilizer, volume 38, issue 4, 2005, Pages 188~193
Pantoea agglomerans immobilized in alginate solubilized four different rock phosphates efficiently under in vitro conditions. The solubilization pattern differed according to the rock phosphate source, where maximum solubilization of Morocco and Tunisia rock phosphates (215.6 and
) on 6 days, Israel rock phosphate (
) and tricalcium phosphate (
) on 10 days and China rock phosphate (
) on 12 days after inoculation was observed. The shelf life of the immobilized bacteria immobilized beads stored in two different temperatures was studied for six months. Beads stored at both room temperature as well as cold storage (
) were found equally good in supporting the bacterial population as well as phosphate solubilizing activity. P. agglomerans immobilized in alginate might be exploited for large scale biosolubilization of rock phosphates intended for fertilizer use.
Reducing Nitrogen Fertilization Level of Rice (Oryza sativa L.) by Silicate Application in Korean Paddy Soil
Lee, Chang-Hoon ; Yang, Min-Suk ; Chang, Ki-Woon ; Lee, Yong-Bok ; Chung, Ki-Yeol ; Kim, Pil-Joo ;
Korean Journal of Soil Science and Fertilizer, volume 38, issue 4, 2005, Pages 194~201
Silicate (Si) fertilizers are well-known for soil amendment and to improve rice productivity as well as nitrogen efficiency. In this study, we investigated the possible reduction level of nitrogen fertilization for rice cultivation by amending Si fertilizer application. Field experiments were carried out to evaluate the productivity of rice (Oryza sativa L.) on a silt loam soil, where three levels of nitrogen (0, 110 and
) were selected and Si fertilizer as a slag type was applied at 0, 1 and 2 times of the recommendation level (available
). Application of Si fertilizer increased significantly the rice yield and nitrogen efficiency. With increasing N uptake of rice, 1 and 2 times of recommended levels of Si fertilization could decrease nitrogen application level to about 76 and
to produce the target yield, the maximum yield in the non-Si amended treatment. Silicate fertilizer improved soil pH and significantly increased available phosphate and Si contents. Conclusively, the Si fertilizer could be a good alternative source for soil amendment, restoring the soil nutrient balance and to reduce the nitrogen application level in rice cultivation.
Field Variability and Variable Rate Fertilization of Nitrogen in a Direct Seeding Paddy for Precision Agriculture
Jung, Yeong-Sang ; Lee, Ho Jin ; Chung, Ji-Hoon ; Park, Jeong-Geun ; Kang, Chang-Sik ;
Korean Journal of Soil Science and Fertilizer, volume 38, issue 4, 2005, Pages 202~210
Since understanding on spatial variability of a field is essential to pursue precision agricultural technology, a field study for field variability and variable rate fertilization of nitrogen in a direct seeding paddy was attempted. Variable rate application of nitrogen was designed with soil test, and field application was tested in a direct seeding paddy in the Kimje, Jeonbuk, Korea. The grid samples of soil was collected from the field of which unit size was 35 m by 112 m on February before irrigating of the field. Soil organic matter, available phosphate and silicate, and extractable potassium were analyzed. Variable rate fertilizer recommendation maps of nitrogen for high yielding, HY, and low input sustainable agriculture, LISA, were derived based on the soil analysis. Direct seeding of rice was performed for variable rate treatment, VRT, for the experimental plot in 2001 and 2002, and so did for three volunteer farmers' field in 2003. Yield mapping was performed by harvesting. Economic feasibility of direct seeding of rice by variable rate fertilization was evaluated. Though increased yield of variable rate application and benefit of reducing fertilizer use and environmental impact, the cost for soil test exceeded the total reduced fertilizer cost.
Effect of Hairy Vetch Green Manure on Nitrogen Enrichment in Soil and Corn Plant
Seo, Jong-Ho ; Lee, Ho-Jin ;
Korean Journal of Soil Science and Fertilizer, volume 38, issue 4, 2005, Pages 211~217
Fresh hairy vetch (HV) as a green manure equivalent to
were incorporated into soil at corn planting in 1997 and 1998 to clarify the effects on changes of nitrogen (N) content in soil and corn plant. The influences of HV for the N of soil and plant were compared with those of ammonium nitrate (AN) in terms of mineralization and microbial biomass. During early decomposition of HV residue, the content of
in HV plot was as much as 60-70% of that in AN plot in surface soil of 0-15 cm depth. In addition, soil microbial biomass N (SMBN) by HV residue was increased up to
more than that by AN. Some mineral N from HV seemed to be released slowly until late corn growth stage judging from high content of
in both corn stem at silking stage and soil at harvest. There were no difference of N accumulations in corn plant at silking stage between HV and AN plots in both 1997 and 1998. At harvesting stage, a total of plant N accumulation in HV plot in 1997 was 8% less than that in AN plot while in 1998 it was 19% more. It was concluded that fresh HV green manure equivalent to
was good enough to substitute the same amount with chemical N fertilizer by slow releasing of mineral N from HV residue in soil.
Ginger Cultivation Under Multipurpose Tree Species in the Hill Forest
Aslam Ali, M. ; Jamaluddin, M. ; Mujibur Rahman, G.M. ;
Korean Journal of Soil Science and Fertilizer, volume 38, issue 4, 2005, Pages 218~221
The present study was investigated in the Chittagong hill forest of Bangladesh to assess the feasibility of ginger cultivation under multipurpose forest and fruit tree species. There were three treatments such as i) ginger grown under open field condition, ie. full sunlight (T1), ii) ginger grown under Gamar tree (spacing of
(T2) and iii) ginger grown under guava tree (spacing
) tree (T3). The experiment was laid out in randomized block design (RBD) and each treatment was replicated three times. From data it was observed that some morphological parameters of ginger such as plant height, number of leaves per plant, leaf length and leaf breadth were higher in the treatments T2 and T3 as compared to the treatment T1. A positive and linear relationship was observed between the weight of rhizome and yield of ginger which caused the highest yield of ginger (
) under guava tree species at partial shaded condition in the T3 treatment (
), whereas the lowest yield (
) was recorded in the T2 treatment when ginger was cultivated under Gamar tree species at closer spacing (
). Therefore, it was revealed that partial shaded condition favoured the optimum growth and yield of ginger, whereas the dense shade from intensively planted tree species badly affected the dry matter production and yield of ginger.
Predicting Water Movement in the Soil Profile of Corn Fields with a Computer-Based STELLA Program to Simulate Soil Water Balance
Kim, Won-Il ; Jung, Goo-Bok ; Lee, Jong-Sik ; Kim, Jin-Ho ; Shin, Joung-Du ; Kim, Gun-Yeob ; Huck, M.G. ;
Korean Journal of Soil Science and Fertilizer, volume 38, issue 4, 2005, Pages 222~229
A simplified one-dimensional model STELLA was used to predict soil water movement in lllinois corn fields using soil water balance sheets. It offered the potential to increase understanding of soil nitrate and agrochemical leaching process. The model accounted for aU possible annual inputs and outputs of water from a closed ecosystem as represented by corn fields. Water inputs included precipitation, while outputs included runoff, transpiration, evaporation and drainage. To run the model required daily inputs of two climatic data measurements such as daily precipitation and pan evaporation. Vertical water flow through the soil profile was calculated with first order equation including the difference in hydraulic conductivity and matric potential at the various soil types. The output results included daily changes of water content in the soil layers and daily amount of water losses including run-off, percolation, transpiration. This model was verified using Illinois corn field data for the soil water content measured by neutron scattering methods through 1992 to 1994 growing seasons. Approximately 22 to 78% of simulated water contents agreed with the measured values and their standard deviation, depending on soil types, whereas 30 to 70% of simulated water values agreed with the measured values and their standard deviations depending on soil layers.