Alvis Ma of Grow-Spec changes the color and intensity of his company’s grow lights on display at the 50th annual World Ag Expo in Tulare on Tuesday, Feb. 14, 2017.
Alvis Ma of Grow-Spec changes the color and intensity of his company’s grow lights on display at the 50th annual World Ag Expo in Tulare on Tuesday, Feb. 14, 2017. CRAIG KOHLRUSS ckohlruss@fresnobee.com
Alvis Ma of Grow-Spec changes the color and intensity of his company’s grow lights on display at the 50th annual World Ag Expo in Tulare on Tuesday, Feb. 14, 2017. CRAIG KOHLRUSS ckohlruss@fresnobee.com

World Ag Expo Day 1: Fitness tracker for cows, drones and pot

February 14, 2017 10:00 AM

UPDATED February 15, 2017 10:19 AM

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