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On the island of Lanzarote, under extreme conditions of aridity and water scarcity, a certain amount of rainfed agriculture has been possible due to the use of tephra mulching, a system known locally as arenados, which is a very effective water and soil conservation system. The natural arenados are associated to already present tephra from recent volcanic eruptions. In artificial arenados a 5 to 20cm...
A study of the effects of slash-and-burn on two 4 × 20 m plots with 30% slope and initial vegetation cover dominated by Ulex is reported. The plots were prepared, burnt and sown with rye following methods used in the area in the 18th century. Available nutrient contents in the plots, and in sediments removed from the plots by surface runoff, were monitored for nine months after burning. Similar data...
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