After an unusually wet 2017, Mae Culumber of University of California Cooperative Extension discusses the importance of irrigation scheduling, even during times absent of drought stress.
Poor maintenance is one of the leading causes of low distribution uniformity, resulting in simultaneous over- and under-irrigation across the orchard block.
Watering walnuts too early can harm root systems, while waiting too long can lead to reduced kernel size. Researchers are working to find the sweet spot.