NICKELS SOIL LAB ANNUAL FIELD DAY
Tuesday, May 19, 2026
6521 Green Bay Ave, Arbuckle, CA
PCA CE credit hours and CCA CE hours requested.

8:30 am — Registration      
Coffee and Donuts provided by Farm Credit Services of Colusa – Glenn, ACA

Cycle I: 9:20-10:45 am

1. 13 years of yield comparison: Independence & Nonpareil/pollinizers
   Franz Niederholzer, Orchards Advisor, UCCE Colusa and Sutter/Yuba Counties
2.  Advances in table olive harvesting
   Becky Wheeler-Dykes, UCCE Orchards Advisor, Glenn, Colusa, and Tehama Counties 
3. Protecting young trees from herbicide-induced trunk injury: recent research
   Ryan Hill, UCCE Agronomy and Weeds Advisor, Tehama, Glenn, and Shasta Counties 
4. Updates on almond Red Leaf Blotch epidemiology and management
   Renaud Travadon, Project Scientist, Department of Plant Pathology, UC Davis

Cycle II: 10:45 am – 12:10 pm

1. Understanding orchard variability: Making the most per acre
   Patrick Brown, Distinguished Professor, Plant Sciences Department, UC Davis  
2. Root Cause Analytics – A practical tool for managing orchard variability and maximizing ROI
   Dan Rooney, CEO LandScan, LLC 
3. Leaffooted plant bug monitoring tools
   Sudan Gyawaly, UC IPM Advisor, Sacramento Valley 
4. Walnut rootstock update and availability of test plants
   Andreas Westphal, Professor, Nematology Department, UC Riverside  

   12:15 pm – BBQ Tri-Tip Lunch (Pierce H.S. FFA fundraiser) by reservation.
   Please call 530-458-0570 by May 12 (Tuesday) to reserve your lunch