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Modification of soil structure of sand tailings: 2. effect of silt, sand and clay contents on aggregate development using organic amendments


Citation

A. M., Mokhtarudin and Subari, Zulkifli (1996) Modification of soil structure of sand tailings: 2. effect of silt, sand and clay contents on aggregate development using organic amendments. Pertanika Journal of Tropical Agricultural Science, 19 (2/3). pp. 137-142. ISSN 0126-6128

Abstract / Synopsis

The effect of skeletal materials (silt and very fine sand) and clay on aggregate formation and stabilization of organically amended sand tailings (99% sand) was investigated. In this experiment, sand tailings were mixed with different proportions ofslime (slime contains 37% silt + very fine sand and 33% clay) and then treated with palm oil mill effluent (POME) cake at the rate of 10.5 g of POME cake per 1200 g of sand-slime mixture. The mixtures were incubatedfor 2 weeks and then air-dried. The extent of aggregation of the samples was determined by dry sieving, and the aggregate stability by wet sieving. The addition of silt + very fine sand and clay improved aggregation and aggregate stability of the sandy soils. The optimum amount of clay required to achieve a good aggregation and aggregate stability for the amount of organic matter added is 25%, where the increase in stability was seven-fold over the control. With slime, which contains 33% clay, this amount of clay can be achieved from a mixture of 75% slime + 25% sand tailings. This mixture contains 32% skeletal materials.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Agriculture
Publisher: Universiti Putra Malaysia Press
Keywords: Soil structure; Sand tailings; Aggregate development; Amendments; Skeletal materials; Clay
Depositing User: Nasirah Abu Samah
Date Deposited: 30 Nov 2009 12:28
Last Modified: 04 Sep 2015 16:50
URI: http://psasir.upm.edu.my/id/eprint/3590
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