Contents

Over 80 years of service to Tulare County
Environmental concerns top Extension's "to do" list

A Look Back: The "Ag Extension" Office Opened in Tulare County in 1918.
A Look Ahead... Tulare County Agriculture Building to Open March, 2001
UCCE develops dairy industry environmental stewardship short course
Tree Fruit:
Strategic pruning speeds production, lowers costs
Choices abound for cotton, grains
Worker Safety:
Extension teaches safe handling of pesticides
4-H Youth: On the grow in Tulare County
Trellis technology shifts from "T" to "Y"
"Radio Tulare" expands Extension's message to the Spanish speaking
Citrus project explores cover crop potential
Cool Cows are productive cows
Field crops support dairy industry, commodities market
UC addreses rangeland water quality management
Yellow starthistle invades state

Celebrating 30 years of EFNEP success
Eating study results in new educational materials for families

Master Gardener volunteers perform services for county
UCCE helps reduce childhood anemia
High density walnut plantings produce positive results
Berries may offer niche small farm opportunity
Teen Survival targets youth

Broccoli: good for you, good for Tulare County
Tulare: namesake to a nut

UCCE Tulare County Home Page

University of California Cooperative Extension, Tulare County 2000

 

High density walnut plantings produce positive results

A hedgerow style walnut planting at harvest displays a productive "tree wall."

Long-term evaluation of several varieties of walnuts planted in a tight, hedgerow configuration has been underway in Tulare County for many years. Hedgerow walnut culture is becoming increasingly popular due to its early, high production potential and the ability to mechanize previously expensive hand pruning.

When configured into a "hedgerow," the walnut grower makes a fundamental decision that the "row" not the "tree" is the orchard's producing unit. Practices such as pruning are designed to maximize row productivity; individual trees within the row are not managed separately.

Studies were conducted in Tulare, Yolo and Stanislaus counties. The oldest is in the Visalia area, planted in 1982 and finalized ten years later. The trees had completed their tenth year of growth following field grafting and 1992 marked the seventh year of field data collection.

The new Tulare variety proved to be the highest yielding, slightly ahead of Chico's 1992 yield and leader in the cumulative yield data (1986-1992). Chandler was significantly lower yielding, although it exceeded two tons per acre.

More importantly, the cumulative yield over the seven years from the Chandler variety was only about three-quarters of that obtained from Tulare. These results from the Visalia trial caused some concern as to the suitability of Chandler for hedgerow planting.


Steve Sibbett, Farm Advisor

 


University of California Cooperative Extension - Tulare County
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Revised: May 8, 2002