Frost protection in almonds: Wind machine studies in 1955 frost season indicate protection in mature almond orchards below that obtained in citrus

Rhoades, D; Brooks, F; Leonard, A; Schultz, H

Frost protection in almonds: Wind machine studies in 1955 frost season indicate protection in mature almond orchards below that obtained in citrus

Authors

D. G. Rhoades
F. A. Brooks
A. S. Leonard
H. B. Schultz

Authors Affiliations

D. G. Rhoades was Assistant Specialist in Agricultural Engineering, University of California, Davis, when these studies were made; F. A. Brooks is Professor of Agricultural Engineering, University of California, Davis; A. S. Leonard is Specialist and Lecturer in Agricultural Engineering, University of California, Davis; H. B. Schultz is Associate Specialist in Agricultural Engineering, University of California, Davis.

Publication Information

Hilgardia 9(8):3-14. DOI:10.3733/ca.v009n08p3. August 1955.

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Abstract

In the Chico area, almond orchards need frost protection—on the average—six nights a year, two years out of three, with one or two of those nights needing 2F or 3F of protection. Late frosts—in April—generally occur only once in eight years. This year there were about one third more frosty nights than usual, and several of those nights occurred in April. This made it possible to conduct a good series of wind machine tests both when the trees were relatively bare and when they had considerable foliage.

Also in this issue:

Pacific coast canned fruits: Report on 1954–55 f.o.b. shipments and price relationships for canned peaches, pears, apricots, and fruit cocktail

Small-nut almonds: Progress in development of varieties consistently producing small sized nuts

Western grape leaf skeletonizer: 1954 biological control program indicates parasitism plus virus disease registering important reduction of vineyard pest

California red scale control: Natural enemies can keep pest under control in citrus groves when given help and in areas with favorable climate

Causes of avocado leaf injury: Certain foliage injury often attributed to insect feeding may actually be the result of some physiological disorder

Salt damage to strawberries: Types of water, irrigation system, and soil condition found to influence salt accumulation in strawberry plantings

Quality of dried french prunes: Studies on fruit maturity for influence on yield, quality, time-range for most profitable harvest of interior valley prunes

Rangeland forage: Almost trebled by seeding rose clover and use of sulfur-bearing fertilizers

Insect transmission, host range, and field spread of potato calico

Initial localization and subsequent spread of curly-top symptoms in the sugar beet