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Effects of sewage sludge amendment on soil aggregation

✍ Scribed by X. Sort; J. M. Alcañiz

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
220 KB
Volume
10
Category
Article
ISSN
1085-3278

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✦ Synopsis

Sewage sludge in doses of 200 and 400 Mg ha 71 (dry weight) were applied in an experimental rehabilitation of a limestone quarry to improve soil physical condition. The eect of this organic waste on soil aggregation and structural stability has been tested measuring aggregate size distribution by dry-and wet-sieving procedures over a period of 28 months. We discuss the in¯uence of the organic components of aggregates on soil structure. The main eect of sewage sludge was to increase aggregate stability to raindrop impact (splash) just after application of the former but one year later this eect decreased notably. Organic matter is distributed in dierent ways between macro-and microaggregates, and this parameter seems to be responsible for the structure changes observed.

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