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标题：Modification of Soil Structure of Sand Tailings: I. Preliminary Study on the Effect of Organic Amendment and Iron on Soil Aggregation
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作者：A. M. Mokhtaruddin ; M. Norhayati
期刊名称：Pertanika Journal of Social Sciences & Humanities
印刷版ISSN：0128-7702
电子版ISSN：2231-8534
出版年度：1995
卷号：18
期号：2
出版社：Universiti Putra Malaysia
摘要：The effectiveness of dried palm oil mill effluent (decanter cake), which contains 14% organic carbon, and iron solution in promoting aggregation in sand tailing soil was determined. The addition of iron or decanter cake at rates of 20 and 60 t ha: 1 had no significant effect on the aggregation and stability of the sand. At a higher rate of 100 t ha1, decanter cake gave a significant effect on aggregate stability. With the addition of 0.1% Fe, the rate of decanter cake application for effective stabilization was reduced to almost half. However, generally the extent of aggregation was low (% aggregation> 2mm was only 5.6%). This could be due to the low amount of very fine sand and silt, amounting to only 5.8%, and the absence of clay in the sand tailings. It is postulated that an improvement in the soil structure of sandy tailings using amendments essentially requires the presence of fine soil fractions viz. clay and silt and/or very fine sand in sufficient amounts. Their presence will lead to better soil structure formation in the sand tailings by the amendments and hence to better water and nutrient economy of the soil.
关键词：structure; sand tailings; amendment; aggregation