Difference of soil properties under agroforestry land use patterns at Klongmaknut Land Development project Changwat Sragaew
1996
Rungdet Vorasri
Studies on soil properties variation under agroforestry land use patterns were conducted at Klongmaknut Land Development project, Changwat Sragaew. Soil samples were collected in December 1994 from areas under several land use patterns. One site has been cultivated with cassava for long times whereas the others areas had been planted to Eucalyptus camaldulensis for six years, and under agroforestry land use patterns for six years, five years and three years respectively. Soil samples were analysed for three properties; physical properties, chemical properties and soil microorganism. The result showed that sand, silt and clay particles of all areas were not different, bulk density and soil porosity in 6-years old Eucalyptus were the highest while percentage of soil moisture content in cassava plantation was the highest. 6-years old Eucalyptus showed the highest infiltration capacity. Soil pH in all areas were not different while soil organic matter in 6-years old Eucalyptus was the highest. The available phosphorus and exchangeable calcium was highest in 5-years old agroforestry and the available potassium in 6-years old Eucalyptus was the highest but the average exchangeable magnesium was not different. CEC in 6-years old Eucalyptus was the highest. Total bacteria and actinomycetes in 6-years old agroforestry were the highest while actinomycetes was not found in cassava planting area. The result of this study revealed that soil fertility in cassava plantation was the lowest while that of Eucalyptus areas were better. Soil properties in long time agroforestry were better than in short time agroforestry.
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