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MB3 181b: Smelling Flowers on Shabbos (336:9-11)
Removing grass from a rain gutter on Shabbos.
Smelling an aromatic flower on Shabbos is permissible even if still attached to the ground unless it's edible.
Soaking kernels of grain on Shabbos is a toldah of zoreah (planting).
Soaking dried fruit in water
Placing detached tree branches in water.