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The shrinkage ratio of loam can be reduced by the addition of fibres such as animal or human hair, fibres from coconuts, sisal, agave or bamboo, needles from needle trees and cut straw. This is attributable to the fact that relative clay content is reduced and a certain amount of water is absorbed into the pores of the fibres. Because the fibre increases the binding force of the mixture, moreover, the appearance of cracks is reduced.