What is the purpose with the green bag on the tree's bottom part?
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Answers:
A "water bag" (commonly a green bag) serves a couple of purposes. The first of which is to keep the root ball of a newly planted tree wet. It accomplishes this task by providing a small drip on the soil for a prolonged period of time. Typically, a water bag will last a few days. In addition to watering the tree, the bag also helps slow the rate of evaporation (similar to mulch) - so less water is needed to keep the soil wet. If you live in a hot climate - water bags significantly improve the likelihood of a transplanted tree surviving a hot summer.
slow water drip for the roots to grow and not be burned by heat and dryness.
If it's a newly planted tree, the bag is filled with water and slowly drips water from holes in the bottom to give the tree enough water without drowning its stressed roots. This is a great way to get a new tree, especially one that was just dug or wrapped in burlap, established.
this is a water saving drip system for newly planted trees-the clever inventor has made a fortune.good for him/her
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