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Long-term Assessment of Soil Chemical Properties in Different Soil Texture Orchard Fields in Gyeongnam Province

  • Kim, Min Keun (Gyeongsangnam-do Agricultural Research and Extension Services) ;
  • Sonn, Yeon-Kyu (National Academy of Agricultural Science, Rural Development Administration) ;
  • Kang, Seong-Soo (National Academy of Agricultural Science, Rural Development Administration) ;
  • Heo, Jae-Young (Gyeongsangnam-do Agricultural Research and Extension Services) ;
  • Kim, Dae-Ho (Gyeongsangnam-do Agricultural Research and Extension Services) ;
  • Choi, Yong-Jo (Gyeongsangnam-do Agricultural Research and Extension Services) ;
  • Lee, Sang-Dae (Gyeongsangnam-do Agricultural Research and Extension Services) ;
  • Shin, Hyun-Yul (Gyeongsangnam-do Office of Planning and Coordination) ;
  • Ok, Yong Sik (Biochar Research Center, Department of Biological Environment, Kangwon National University) ;
  • Lee, Young Han (Gyeongsangnam-do Agricultural Research and Extension Services)
  • Received : 2015.07.29
  • Accepted : 2015.08.20
  • Published : 2015.08.31

Abstract

The monitoring of soil fertility changes in orchard is very important for agricultural sustainability. Field monitoring was performed to evaluate the soil chemical properties of 140 orchard (23 sites for sandy loam, 88 sites for loam, 28 sites for silt loam, and 1 site for loamy fine sand) in Gyeongnam province every 4 years from 2002 to 2014. Soil chemical properties such as pH, electrical conductivity, amount of organic matter (OM), available phosphate ($P_2O_5$), lime requirement (LR), exchangeable potassium (K), calcium (Ca), magnesium (Mg), and sodium were analyzed. The amount of OM, exchangeable K, Ca, and Mg were significantly increased as cultivation year increases. The frequency distribution within optimum range of subsoil chemical properties in 2014 was 34.3% for pH, 35.0% for OM, 17.1% for available $P_2O_5$, 22.9% for exchangeable K, 15.7% for exchangeable Ca, and 22.1% for exchangeable Mg. In addition, the available $P_2O_5$ and exchangeable calcium were excess level with portions of 69.3% and 48.6%, respectively. The soil chemical properties in the topsoil and subsoil showed that soil pH was significantly higher in sandy loam soil than those from the loam and silt loam soils. The OM, exchangeable K, Mg, and LR of loam soil were higher than those from the sandy loam soil. These results indicated that a balanced management of soil chemical properties as affected by soil texture can improve the amount of fertilizer applied for sustainable agriculture in orchard field.

Keywords

Chemical property;Orchard field;Soil fertility;Soil texture

Acknowledgement

Grant : Cooperative Research Program for Agriculture Science & Technology Development

Supported by : Rural Development Administration

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