The dirt under Brian Blackwell's Bakersfield pistachio trees is dry. Light in color and thirsty, the soil doesn't get all the water it needs.
In fact, it only gets a third of what is needed to grow a full, mature crop of pistachios, according to Blackwell, the owner of Blackwell Farming Company who is also a farm manager responsible for about 6,000 acres of crops in Southern California.
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