California Agriculture, July 1959

Volume 13, Number 7
Effect of gibberellin sprays on celery growth

research articles

Gibberellin sprays on celery: Field trials in southern California revealed differences in results due to spray concentrations, timing, and to season
by F. H. Takatori , O. A. Lorenz , F. W. Zink
pp3-4, doi#10.3733/ca.v013n07p3
Abstract
Abstract Not Available – First paragraph follows: Investigations with gibberellin sprays –initiated in the summer of 1957–were carried out in commercial celery fields in Orange, Ventura, and San Diego counties, during the summer, fall, and winter production periods.
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Alfalfa hay conditioning tests: Relative drying rates, field losses, chemical composition of the hay, and feeding response of sheep studied in '58 season
by R. A. Kepner , J. R. Goss , J. H. Meyer , J. B. Dobie , L. G. Jones
pp5-6, doi#10.3733/ca.v013n07p5
Abstract
Abstract Not Available – First paragraph follows: Four hay conditioning machines– two models of smooth-roll crushers and two models of crimpers–were used in tests in 1958 on all six cuttings of a four-year-old alfalfa field at Davis.
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Clover seed chalcid in alfalfa: No effective chemical control measures yet available for use against insect causing heavy losses to alfalfa seed growers
by Oscar G. Bacon , Walter D. Riley , Vernon E. Burton , Armen V. Sarquis
pp7, doi#10.3733/ca.v013n07p7
Abstract
Abstract Not Available – First paragraph follows: A tiny wasp, the clover seed chalcid– Bruchophagus gibbus (Boh.)–is of increasing importance as a major pest in central California alfalfa seed producing areas. The insect has long been known in California and its damage has been particularly severe in the southern desert regions.
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Brown spot of bartlett pears: Disorder of canning pears a direct result of impact bruising of firm fruit during the handling operations after harvest
by G. E. Mattus , L. E. Scott , L. L. Claypool
pp8, doi#10.3733/ca.v013n07p8
Abstract
Abstract Not Available – First paragraph follows: Barlett pear canners have been concerned with brown flesh areas called brown spot that are not externally evident but are found upon peeling of pears.
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Mechanical potato harvesting: Studies conducted in Kern County indicated less injury to potatoes when harvested by machine than by hand harvesting
by J. R. Tavernettl , Mike B. Zahara
pp9, doi#10.3733/ca.v013n07p9
Abstract
Abstract Not Available – First paragraph follows: Three varieties of potatoes–White Rose, Pontiac, and Kennebec–were harvested mechanically to study the operational efficiency of the machines and to make a comparison between the amount of damage to the potatoes by mechanical and by hand harvesting. Six two-row, direct harvesting type–digging and loading in one operation–machines of the same make were used. The harvesters were pulled by track type tractors of 40-15 horsepower but had their own engines or operating the harvester mechanisms. The studies were made in three fields near Arvin and in two fields near Edison.
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Nitrification of fertilizers: Mean winter temperature of 45°F prevalent in state's farm areas not sufficiently low to prevent substantial oxidation
by K. B. Tyler , F. E. Broadbent , G. N. Hill
pp10, doi#10.3733/ca.v013n07p10
Abstract
Abstract Not Available – First paragraph follows: The validity of the assumption–that nitrogen losses, by leaching, are small when ammonium fertilizers are applied in the fall–was tested in a series of incubation experiments.
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Area-wide drainage: Herringbone pattern and interception type systems solve drainage problems
by Jewell L. Meyer , Clyde E. Houston
pp11, doi#10.3733/ca.v013n07p11
Abstract
Abstract Not Available – First paragraph follows: Nearly 50 acres of apricot trees in the Patterson area of Stanislaus County were killed when the water table rose to within 3' of the surface in 1955. Several hundred additional acres were threatened by a rising water table.
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Integrated control measures: Experiments in lemon grove near Carpinteria showed selective miticides to be compatible with biological control of red scale
by Paul DeBach , John Landi , Lee Jeppson
pp12, doi#10.3733/ca.v013n07p12
Abstract
Abstract Not Available – First paragraph follows: Biological control of California red scale– Aonidiella aurantii (Mask.)–by natural enemies, especially parasites, may be achieved in some citrus-producing areas of southern California. However, in many instances other citrus pests present in the same areas may be of sufficient magnitude to necessitate regular or periodic insecticidal treatment.
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Filbertworm control: Experimental insecticides show promise in tests on northern California walnuts
by A. H. Retan , G. R. Post , A. E. Michelbacher
pp13-14, doi#10.3733/ca.v013n07p13
Abstract
Abstract Not Available – First paragraph follows: In the second year of tests, Guthion and Sevin–not yet released for use on walnuts–again showed encouraging control of the filbertworm on Payne and Franquette walnuts.
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Application of prior research: Accumulated information obtained by research often provides ready solutions to many problems of agricultural production
by Paul F. Sharp
pp15, doi#10.3733/ca.v013n07p15
Abstract
Abstract Not Available – First paragraph follows: The immediate commercial value of research information enabling scientists to solve rapidly many of the problems facing agriculture has been demonstrated repeatedly; what might have happened without this information is awesome to contemplate.
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General Information

Frozen strawberry competition California's: Slight interregional advantage could be reduced by small changes in the cost structures in competing regions
by Carleton C. Dennis
pp2, doi#10.3733/ca.v013n07p2
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