Journal of
Soil Science and Environmental Management

  • Abbreviation: J. Soil Sci. Environ. Manage.
  • Language: English
  • ISSN: 2141-2391
  • DOI: 10.5897/JSSEM
  • Start Year: 2010
  • Published Articles: 287

Full Length Research Paper

Soil physical properties during different development stage of fruit orchards

Pham Van Quang1,2*, Per-Erik Jansson1 and Vo Thi Guong3  
1Department of Land and Water Resources Engineering, KTH, SE 100 44 Stockholm, Sweden. 2Department of Soil Science and Natural Resources, Faculty of Agriculture and Natural Resources, An Giang University, Vietnam. 3Department of Soil Science and Natural Resources, Agriculture and Applied Biology College, Can Tho University, Vietnam.
Email: [email protected]

  •  Accepted: 29 October 2012
  •  Published: 31 December 2012

Abstract

In the Mekong Delta (MD), fruit trees are usually grown on raised-beds to avoid submergence due to annual flooding. The soils are mostly alluvial and disarranged from the natural soils. The soil may be adversely impacted temporally, particularly with its physical properties. The study was conducted on 10 citrus plantations in Hau Giang province, MD, to illustrate if the covariance between clay content and age can be separated from the impact of soil ageing on compaction; we further discuss the design of how to make an investigation where only age is the analyzed event that age has a covariance with the spatial scale. Soil sampling was done in the dry season 2010 at two soil depths for each raised-bed to analyze soil physical properties. Soil texture can be classified as silty-clay soil. The bulk density of topsoils ranged from 0.76 to 1.18 g cm-3 and slightly lower than subsoils; 0.85 to 1.24 g cm-3. Saturated hydraulic conductivity spanned the range from 2.04 to 5.43 m day-1 for topsoils and significantly higher than in subsoils; 1.4 to 5.5 m day-1. Organic matter was in the range of 4.4 to 12.2% for topsoils and significantly higher than in subsoils; 3.0 to 9.6%. A significant tendency of soil degradation with aging was found. Clay content showed a covariance with age of raised-beds counteracting the compaction processes. The high clay content for the aged raised-bed may have been hiding some of the compaction process. The relation between age and soil degradation was seen for the larger pore sizes within the water retention curve.

 

Key words: Soil physical properties, soil texture, soil compaction, Mekong delta.