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2025 Vol.58, Issue 1 Preview Page

Short communication

Regional differences in chemical and biological characteristics of organic upland soils in Chungbuk province
Jiwon Do1*
,
SeongKyeom Kim1
,
Sung-Hee Lee1
,
Cho-Rong Lee2
,
Jae-Ho Park1
,
Ju-Hyoung Kim1
1Researcher, Chungcheongbuk-do Agricultural Research and Extension Services, Cheongju 28130, Korea
2Researcher, Organic Agriculture Division, National Institute of Agricultural Sciences, RDA, Wanju 55365, Korea
*Corresponding Author
28 February 2025. pp. 104-117
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Abstract

The chemical and biological properties of the soil are important factors affecting crop productivity and soil health. Therefore, main purpose of this study was to investigate the chemical and biological properties of soils managed organically for over five years in the Chungbuk region, as well as the correlations among these properties. As a result of the analysis, the soil in the northern region generally had higher pH (7.4) and soil organic matter (45.1 g kg-1) compared to other regions (p < 0.05). In addition, it was confirmed that calcium and magnesium tended to accumulate excessively as the soil organic matter increased. On the other hand, the overall enzyme activity and soil respiration tended to increase according to the soil organic matter. In particular, the accumulation of organic matter significantly promoted dehydrogenase (149.3 TPF μg g-1 24 h-1) and urease activities (210.0 NH4-N μg g-1 24 h-1), which are interpreted as the result of enhancing the microbial organic matter decomposition and nitrogen cycle process. These results suggest that while soil organic matter has a positive effect on soil microbial activity, excessive accumulation of cations can have a negative effect on crop growth and soil health, suggesting the importance of balanced organic matter management. This study provides important basic data for evaluating the soil health of organic farmland, and suggests the need for future research to elucidate the effects of these characteristics on agricultural productivity and environmental health.

Pearson correlation coefficient of the chemical and biological properties of soils in the Chungbuk region.
pH EC OM Av. P2O5 T-N Ex. Ca Ex. K Ex. Mg SR DHA GLU URE AP
pH 1
EC -0.21* 1
OM 0.20 * 0.03 1
Av. P2O5 -0.01 0.14 0.09 1
T-N -0.01 0.13 0.46 ** 0.28 ** 1
Ex. Ca 0.47 ** -0.10 0.41 ** 0.05 0.10 1 　
Ex. K 0.04 0.09 0.12 0.45 ** 0.43 ** 0.06 1 　
Ex. Mg 0.33 ** -0.05 0.41 ** 0.28 ** 0.18 0.60 ** 0.27 ** 1
SR 0.37 ** -0.09 0.44 ** 0.03 0.29 ** 0.34 ** 0.16 0.27 ** 1
DHA 0.56 ** -0.16 0.32 ** 0.06 0.24 ** 0.23 * -0.01 0.33 ** 0.45 ** 1
GLU 0.34 ** 0.05 0.21 * 0.08 0.35 ** 0.27 ** 0.12 0.24 ** 0.29 ** 0.61 ** 1
URE 0.51 ** -0.12 0.35 ** 0.24 * 0.35 ** 0.30 ** 0.30 ** 0.37 ** 0.50 ** 0.67 ** 0.55 ** 1
AP -0.64 ** 0.30 ** -0.10 0.10 0.17 -0.30 ** 0.06 -0.26 ** -0.23 * -0.33 ** 0.01 -0.39 ** 1
Keywords
Chemical properties
Soil enzyme activity
Soil health
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Information
  • Publisher :Korean Society of Soil Science and Fertilizer
  • Publisher(Ko) :한국토양비료학회
  • Journal Title :Korean Journal of Soil Science and Fertilizer
  • Journal Title(Ko) :한국토양비료학회 학회지
  • Volume : 58
  • No :1
  • Pages :104-117
  • Received Date : 2024-10-18
  • Revised Date : 2024-12-13
  • Accepted Date : 2024-12-16
  • DOI :https://doi.org/10.7745/KJSSF.2025.58.1.104
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