California Agriculture, November 1953
Volume 7, Number 11
Initiation and spread of freezing in lemons
State's fruit areas: Four major areas produce most of California's fruit and nut crops
by S. W. Shear
Not available – first paragraph follows: Practically all of California's commercial fruit acreage may be classed in one of two types of farming—fruit and mixed farming; or fruit, mixed farming and vegetable crops.
Leaf miner on deciduous fruits: Timing of spray applications important factor in control of pest on pear, apple, and cherry leaves
by Harold F. Madsen , Arthur D. Borden , Robert E. Clark , James E. DeTar
Not available – first paragraph follows: An outbreak of an insect tentatively identified as the spotted tentiform leaf miner—Lithocolletis crataegetta Clem.— occurred on the foliage of pear, apple and cherry orchards in northern California during the 1952 season.
Yellow dwarf of cereals: Effect of date of planting and a study of the host range and varietal reaction to the virus
by John W. Oswald , Byron R. Houston
Second of two articles on a study of yellow dwarf on cereols in California
Alkali soil reclamation: Most carbon dioxide added to irrigation water is lost into atmosphere and as reclaiming agent
by Warren R. Schoonover , J. C. Martin
Not available – first paragraph follows: Use of carbon dioxide in irrigation water had no significant effect toward the reclamation of black alkali soil in the cases of two Tulare County irrigation systems studied.
Electronic sorting of lemons: Mechanical sorting by color of other fruit and vegetables indicated by successful lemon sorter
by J. B. Powers , J. T. Gunn , F. C. Jacob
Not available – first paragraph follows: A photoelectric color sorter—which can duplicate manual sorting practices— has been developed for use in lemon packing houses.
Tests on freezing in lemons: Preliminary experiments on sub cooling and freezing in lemons seek mechanism of ice initiation and spread
by John W. Lucas
Not available – first paragraph follows: Frost damage in a citrus orchard depends upon many factors, in addition to the minimum temperatures attained by the tree parts.
Leaf potassium: Valencia fruit size relationship shown to be variable by studies
by W. W. Jones , Clarence B. Cree
Not available – first paragraph follows: The value or need of potassium fertilization.—to increase Valencia orange fruit size—must be determined for each Valencia growing area because no critical level of leaf potassium can be universally assigned.
Air pollution injury to crops: Injurious components of smog identified as derivatives of petroleum products while annual crop damage increases
by John T. Middleton , J. B. Kendrick , E. F. Darley
Not available – first paragraph follows: Air pollutants that cause typical smog damage—the silvering, bronzing, and spotting on many agricultural crops— are certain olefinic peroxides, formed when ozone reacts with the vapors of unsaturated hydrocarbons derived from gasoline and other petroleum products. In Los Angeles County alone, annual crop losses have exceeded $500,000 since 1949 when they were estimated to be $479,495.
Bermuda-bentgrass mixture: Grass combination resistant to heavy pedestrian traffic sought for use in public parks and recreational areas
by Vernon T. Stoutemyer
The studies reported in the following article were conducted by Zaki Mahdi, a graduate student in Ornamental Horticulture, working under the direction of Professor Vernon T. Stoutemyer.
Cotton quotas and allotments: Impact of area variations in farm resources and past crop production patterns on farm income
by C. O. McCorkle, T. R. Hedges