California Agriculture, July-August 1981
Volume 35, Number 7
peer-reviewed research articles
Automatic squid cleaning machine
by R. Paul Singh , Daniel E. Brown
Squid, a low-cost, nutritious food, is not popular in the United States, partly because the average consumer doesn't know how to clean it. This machine does the job automatically.
Cost comparison of hand and mechanical harvest of mature green tomatoes
by Mike B. Zahara , Stanley S. Johnson
Under some conditions, mature green tomatoes can be picked as cheaply by a highly productive hand-harvest crew as by machine.High- and low-output hand harvest was compared with machine harvest at various yields and lengths of season.
Presence-absence sampling of spider mite densities on cotton
by Lloyd T. Wilson , Thomas F. Leigh , Victor Maggi
A simple, practical plan for reliably estimating mite densities overcomes problems of quantitative sampling.Spider mite densities on cotton can be quickly estimated by recording only the presence or absence of mites on a leaf.
Responses of young almond trees to late-season drought
by Elias Fereres , Thomas M. Aldrich , Herbert Schulbach , Donald A. Martinich
Water requirements of young almond orchards must be met throughout the season, despite the tree's reputation for drought resistance.Although almond trees resist drought, growth and yield of young trees can be reduced by early termination of irrigation.
Farm size relationships, with an emphasis on California: A summary report
by Harold O. Carter , Warren E. Johnston
Production cost savings tend to level off at medium-size farms, but many other factors influence expansion beyond that point.
Citrus whitefly parasites established in California
by Mike Rose , Paul DeBach
Some imported natural enemies have become established in California and may help prevent citrus whitefly population buildup.
Available nitrogen from animal manures
by Parker F. Pratt , Javier Z. Castellanos
Composted manure is low in odor and has good physicalproperties, but fresh manure has more nitrogen available to plants.
Citrus flat mite on pistachios in California
by Richard E. Rice , Gary B. Weinberger
This citrus pest has been seen in pistachio plantings in northwestern Kern County.Citrus flat mite infestations, new to southern California pistachios in the past two years, are being watched by entomologists.
Seeking the reasons for differences in orange tortrix infestations
by Hiroshi Kido , Donald L. Flaherty , Charles E. Kennett , Norman F. McCalley , Daniel F. Bosch
In one of the two vineyards studied, evidence pointed to natural enemies as the cause of the low orange tortrix populations sampled.
Euphorbia lathyris: A potential source of petroleum-like products
by Roy M. Sachs , Clifford B. Low , James D. MacDonald , Abdel R. Awad , Michael J. Sully
Hydrocarbons from E. lathyris would have to sell for $150 to $200 a barrel to be a practical source of fuel.Euphorbia lathyris produces a hydrocarbon-rich latex, but extensive field trials show the plant is not an economical fuel source.
editorial, news, letters & science briefs
Domestic issues affecting U.S. agriculture
by J. B. Kendrick