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Just planted 1103 rootstock
Those white things are unused milk cartons with open tops and bottoms.  Their purpose is to shelter tender young plants from marauding jackrabbits (just saw another one hop past my window -- where is that bobcat when you need him?).  Inside the milk cartons: newly planted 1103 rootstock, which will be field grafted to Rodeno clone Sangiovese once the root systems are established. 

The black hoses are for drip irrigation, since hand watering hundreds of plants is pretty tedious.  Once the vines are established, irrigation needs diminish.  Everyone in California (and plenty of other places where water conservation is vital) owe a big thank you to an 81-year old Israeli for inventing this efficient way to deliver water to thirsty plants without wasting any.  Read more about it here