If one cuts down an olive-tree, he may not cover up [the stump] with earth, but he may cover it with stones or straw. If one fells a Sycamore tree, he must not cover [the stump] with earth, but he may cover it with stones or straw. One may not hew down a virgin Sycamore in the Seventh Year, for this would constitute actual labour. R. Judah says: if [cut down] in the usual manner, it is forbidden; but he either cuts it ten handbreadths above [the soil], or he razes it to ground level.