SANTIAGO :Small mats of human hair line the base of plants, helping lock in moisture for crops in orchards around Chile that have been struggling with drought for years. The hair, which is turned into sheets and discs of compostable mulch through mechanical weaving, reduces direct evaporation by 71 per cent and saves up to 48 per cent of irrigation water, according to the Matter of Trust Chile foundation, which makes the hair mats. "Hair is very interesting. It contains nutrients, nitrogen,