California Agriculture, December 1948
Volume 2, Number 12
Improvements in mechanical harvesting
Orange tree quick decline: Insects in citrus plantings studied as possible carriers
by R. C. Dickson , R. A. Flock , M. McD. Johnson
Not available – first paragraph follows: The work on insects in relation to the spread of orange tree quick decline has heen going on since 1945. During this period it was determined which insects are found commonly in southern California citrus groves and over 750 transmission tests were conducted in an attempt to discover the vector.
Color retention: Pigmentation in processed fruits and vegetables is complex problem
by G. Mackinney
Not available – first paragraph follows: The accurate measurement of color in a product is a very difficult matter and is usually attempted in considerably simplified form in the food industries, as for example, by canners in standardizing and in improving the color of tomato products. It is much simpler to state that a certain tomato paste has, let us say, 0.01% lycopene—the principal coloring matter of the tomato fruit—than to measure the color, which means, in effect, describing its redness in quantitative terms.
Wind machines in orchards: Best adapted to combatting short, light radiation frosts
by F. A. Brooks , R. A. Kepner , D. G. Yerg
Not available – first paragraph follows: Wind machines afford economical frost protection where short, light radiation frosts are frequent and it is impractical to call out crews to light orchard heaters.
Live-virus PE vaccine limitations: Dangers, advantages of new product against pneumoencephalitis
by A. S. Rosenwald
Not available – first paragraph follows: Vaccinating against pneumoencephali-tis—Newcastle disease, pneumo, PE—with the live-virus vaccines has been erroneously greeted as the final answer in the control of this disease. These live-virus vaccines are stop-gap measures. Little thought has been given to the many pitfalls and dangers of these products.
Growth of olive fruit: Follows three-period growth pattern of other stone fruits
by H. T. Hartmann
Not available – first paragraph follows: The olive fruit has, in general, the same growth pattern of the other stone fruits, such as the peach, plum, apricot, and cherry.
Developments in mechanized farming equipment: Cotton harvester further improved toward full efficiency
by J. P. Fairbank
Not available – first paragraph follows: Few California farmers grow cotton exclusively.
Developments in mechanized farming equipment: Brush-type almond harvester and new prune catcher successful in field
by R. R. Parks
Not available – first paragraph follows: Brush type almond harvesters—in practical use for the first time this year—already have demonstrated advantages over the suction type harvesting equipment introduced three seasons ago.
Processed apricots: Frozen, dehydrated and canned products studied for effects on skin textures
by Leonora Hohl Strohmaier
Not available – first paragraph follows: Incidental to the studies which have been undertaken in the Food Technology Division for the past 30 years, it has been observed repeatedly that the skins of frozen apricot halves have a disagreeable tough texture. Consumers of the commercially frozen fruit also have expressed disapproval of this characteristic. Thinking over this problem always raises the question: Are the skins really tougher in frozen apricots than in their fresh counterpart, or do they only appear to be so by contrast with the flesh which becomes somewhat flabby as a result of freezing and thawing?
Radioactive sugars: Synthesized for studies in the metabolism of plants and animals
by W. Z. Hassid
Not available – first paragraph follows: Carbohydrates, essential foods in human nutrition, are manufactured by green plants. All other living creatures are completely dependent upon plants, because they alone have the power to make sugars from the simple materials of carbon dioxide and water. This is accomplished by a process called photosynthesis.
Agricultural outlook: As of December, 1948
by George B. Alcorn