California Agriculture
California Agriculture
California Agriculture
University of California
California Agriculture

Archive

July-August 1981
Volume 35, Number 7

Peer-reviewed research and review articles

Automatic squid cleaning machine
by R. Paul Singh, Daniel E. Brown
| Full text HTML  | PDF  
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
| Full text HTML  | PDF  
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
| Full text HTML  | PDF  
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
| Full text HTML  | PDF  
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
| Full text HTML  | PDF  
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
| Full text HTML  | PDF  
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
| Full text HTML  | PDF  
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
| Full text HTML  | PDF  
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
| Full text HTML  | PDF  
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
| Full text HTML  | PDF  
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.

News and Opinion

Domestic issues affecting U.S. agriculture
by J. B. Kendrick
Full text HTML  | PDF  
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July-August 1981
Volume 35, Number 7

Peer-reviewed research and review articles

Automatic squid cleaning machine
by R. Paul Singh, Daniel E. Brown
| Full text HTML  | PDF  
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
| Full text HTML  | PDF  
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
| Full text HTML  | PDF  
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
| Full text HTML  | PDF  
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
| Full text HTML  | PDF  
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
| Full text HTML  | PDF  
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
| Full text HTML  | PDF  
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
| Full text HTML  | PDF  
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
| Full text HTML  | PDF  
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
| Full text HTML  | PDF  
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.

News and Opinion

Domestic issues affecting U.S. agriculture
by J. B. Kendrick
Full text HTML  | PDF  

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