| Description |
The research of glyphosate herbicide distributionin soil is important because of the contribution tothe knowledge. The goals of the research were to:i). know the distribution pattern of glyphosateherbicide which infiltrated in the soil, ii).understand the effects of glyphosate herbicideresidues on soil properties and plant growth.There were three soil subgroups (Typic Udifluvent,Andic Dystrudept, and Typic Dystrudept)that prepared into soil columns and treated with 3kg/ha glyphosate. Results showed that thedistribution of glyphosate in soil is mostlyinfluenced by soil texture, especially the clay. Thesoil with textural classes of sand, loam and clay atfield capacity condition adsorbed glyphosate until62%, 91%, and 99% respectively after theglyphosate applicated through soil surface. Waterinfiltration was equivalent to 2x125 mm rainfall.Concentration of glyphosate residue on the lowerlayer increasing on sand texture and vice versedecreasing on clay texture. The residues ofglyphosate changed several properties of soil,both chemical and biological. Effects of glyphosateresidue increased P-available, decreasedFe-available, total microorganism number,Rhizobium, and phospho-solubilizing bacteria onall three class textures.
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