California Rare Fruit Growers – Central Coast Chapter
September 2019 Newsletter
by Lori Bright
September 14, 2019 Meeting: Bartleson Ranch
Announcement: It’s time for many of us to renew our State Memberships!
Another lovely day on the Central Coast. We were lucky enough to spend our time with the Bartlesons. Their ranch, located on the Mesa, was as beautiful as our hosts were gracious. Jan Bartleson greeted us and introduced us to her grandson Stuart Winslow. We all settled in and gathered in the patio of their “Party Barn” for an informative chat with Stuart.
This picturesque Commercial Fruit Ranch has been donated to Cal Poly. Stu Bartleson conveyed that he is “excited to think that the ranch will help prepare today’s students to become tomorrow’s Ag industry leaders”. Wow, what a great statement from a great guy.
The Bartleson Ranch has 120 acres of Lisbon Lemons and 80 acres of Hass Avocado. Water has been an ongoing challenge for the ranch. Thirty years ago our winters brought plentiful rains. Now with drought conditions, the ranch needs to rely more heavily on groundwater. This too is a challenge because of some newly developed properties “Up River” that can take a lion’s share of that groundwater before it reaches the Bartleson property. The Ranch has 12 wells but as of this writing, (September 2019) only one well is operational.
Stuart gives their mature trees 40 gallons of water per week. He concedes that the Avocados might like a bit more, but at this point he practices deficit irrigation (trees receive just enough water to keep them from being drought stressed).
Fertilization is carried out with granular fertilizers in the Winter and liquid food in the growing season. The liquid feed is done by injection into the irrigation system. In addition, a liquid Mycorrhizal supplement is also added into that system. Stuart has seen great results with the added “Good” fungus, especially with the citrus. Each tree, Citrus and Avocado receives approximately 1 pound of nitrogen per year.
Micro-sprinklers have proved to be inefficient due to wind and so the mature trees are outfitted with eight 1 gallon drip emitters each.
Avocados were “stumped” during drought years which saves one full year of irrigation, but looses two years of harvest.
Citrus are pruned in October. The purpose of this is to:
- Thin the interior, allowing for more light
- Remove tall, suckering and crossed branches
- Get skirts up off the ground
As with all crops there are pests that must be dealt with. With concerns of Citrus Greening and its
vector the ACP (Asian Citrus Psyllid), multiple sprayings are needed.
When sprayed for one thing, often times another pest rears its ugly head. Stuart has a resolution for eliminating some of that spraying by building a “Washing Station” for the Lemons. Awesome solution!
Cal Poly Professor Dr. Garner joined us and spoke of the partnership here at the Bartleson Ranch. Cal Poly Students learn about irrigation, pest management and crop production with classes taught on site. Dr. Garner’s superabundant-student-load shows her to be ever at the top-of-her-game and in high demand. What luck these student have to be partnered with an educator such as Dr. Garner and a generously donated location such as The Bartleson Ranch.