Browse > Article
http://dx.doi.org/10.11625/KJOA.2015.23.4.875

Physico-Chemical Properties of Organically Cultivated Upland Soils  

Lee, Cho-Rong (국립농업과학원 유기농업과)
Hong, Seung-Gil (국립농업과학원 유기농업과)
Lee, Sang-Beom (국립농업과학원 유기농업과)
Park, Choong-Bae (국립농업과학원 유기농업과)
Kim, Min-Gi (국립농업과학원 유기농업과)
Kim, Jin-Ho (전라북도 농업기술원 기후변화 대응과)
Park, Kwang-Lai (국립농업과학원 유기농업과)
Publication Information
Korean Journal of Organic Agriculture / v.23, no.4, 2015 , pp. 875-886 More about this Journal
Abstract
The upland soils (56 samples) from organic farms in Gyeonggi-do (12 sites), Gangwon-do (8 sites), Chungcheong-do (14 sites), Gyeongsang-do (4 sites), Jeollado (18 sites) in Korea were collected and their physical and chemical properties were analyzed by RDA's methods. In the results of physical property, the bulk density of soils averaged $1.14Mgm^{-3}$ (surface soil), $1.38Mgm^{-3}$ (subsoil), respectively. The porosity of them was 57%, 48%. Organically managed soil's (OS) bulk density was lower than conventional soil's but OS's porosity was a little higher than conventionally managed soil in surface soil. The depth of plough layer in organically managed soils was 21.2 cm indicating that the organic farming had good effect on soil physical property. In the results of chemical property, the surface soil pH was 6.9 and the contents of organic matter (OM) was $26gkg^{-1}$, available phosphate (Avail. $P_2O_5$) was $554mgkg^{-1}$, exchangeable calcium (Exch. Ca) was $8.9cmol_ckg^{-1}$, exchangeable potassium (Exch. K) was $0.89cmol_ckg^{-1}$, exchangeable magnesium (Exch. Mg) was $2.0cmol_ckg^{-1}$. The subsoil pH was 6.8 and the contents of OM was $21gkg^{-1}$, avail. $P_2O_5$ was $491mgkg^{-1}$, exch. Ca was $7.9cmol_ckg^{-1}$, exch. K was $0.68cmol_ckg^{-1}$, exch. Mg was $1.8cmol_ckg^{-1}$. The nutrient accumulation emerged in organic farming. Compared to the optimum nutrient range for the conventional upland soils, the exceed rate of pH, OM, available phosphate, and exchangeable Ca, K, and Mg was 79, 52, 64, 84, 66% and 55%, respectively, which mainly resulted from the over-application of lime materials or livestock manure compost. With these results it is suggested that organic farm need to reduce the use of inputs, which make soil alkalification or nutrient accumulation. More study on effects of inputs on lowering soil pH from alkalification could help organically managed soil to be improved.
Keywords
chemical property; organic farming; organic matter; soil; physical property;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Poudel, D. D., W. R. Horwarth, W. T. Lanini, S. R. Temple, and A. H. C. van Bruggen. 2002. Comparison of soil N availability and leaching potential, crop yields and weeds in organic, low-input and conventional in northern California. Agric. Ecosys. Environ. 90: 125-137.   DOI
2 Cho, H. J., S. W. Hwang, K. H. Han, H. R. Cho, J. H. Shin, and L. Y. Kim. 2009. Physicochemical properties of upland soils under organic farming. Soil Sci. Fert. 42: 98-102
3 Choi, H. S., X. Li, W. S. Kim, Y. Lee, and H. J. Jee. 2011. Comparison of soil physicochemical and microbial characteristics in soil of 'Niitaka' pear orchards between organic and conventional cultivations. Kor. J. of Organic Agri. 19: 229-243
4 Glover, J. D., J. P. Reganol, and P. K. Andrews. 2000. Systematic method for rating soil quality of conventional, organic, and integrated apple orchards in Washington State. Agric. Ecosys. Environ. 80: 29-45   DOI
5 NAAS. 2010. Annual report of the monitoring project on agro-environmental quality. RDA, Suwon.
6 NAAS. 2011. The manual on agricultural utilization for producing environment-friendly agricultural products. p. 15. RDA, Suwon.
7 NIAST. 2000. The method of soil and plant analysis. pp. 29-131. RDA, Suwon.