The Sickles from Extra Utilities 2 are supposed to be able to harvest crops and clear leaves in a large area (up to 9x9x9 for the diamond one), however due to yet another sponge bug, they don't cause any of the broken leaves or crops to drop any items. As such until they are fixed I recommend disabling them so that no one else wastes resources crafting them only to find they can't be used because they delete all your crops and give nothing back.