California Agriculture, June 1978
Volume 32, Number 6
peer-reviewed research articles
Agricultural mechanization and public policy
by Philip L. Martin , Stanley S. Johnson
Farmworkers who are displaced by mechanization enjoy few legislative or private contract rights to adjustment assistance. Farmworkers and society would both be better off if programs were developed that reduce the hardship accompanying inevitable displacement.
Bracken fern control with several herbicides
by Steven R. Radosevich , Willam H. Brook , David R. Adams , Walter B. McHenry
Because bracken fern produces phytotoxins that disturb the normal development of other plants, insects, and animals, the chemicals that control it are particularly important.
Sugar beet: An efficient user of soil nitrogen
by F. Jack Hills , Gary R. Peterson
New measuring techniques have enabled researchers to accurately estimate the amount of N to apply to achieve maximum sugar yield.The efficient use of nitrogen fertilizer for sugarbeets calls for just enough to achieve maximum sugar yield, and no more. Experiments indicate that a t the correct application rate, excess N is not left to leach to ground waters.
Parasitic nematode seeks out navel orangeworm in almond orchards
by James E. Lindegren , Charles E. Curtis , George O. Poinar
Because the orangeworm-infested almond is not penetrable by most insecticides, a better solution to NOW infestation might be a biological control method. application of an entomophagous nematode.A strain of nematode used as a biological insecticide on a variety of crops has found new application as a biological control agent of NOW in almond orchards.
Effects of prolonged drying and harvest delay following ethephon on walnut kernel quality
by George S. Sibbett , George C. Martin , T. Mark Draper
Walnut kernel quality deteriorates if harvest is delayed. Ethephon, applied to advance harvest, was not found to accelerate this process.
Avoiding ethylene concentrations in harvested lettuce
by Leonard L. Morris , Adel A. Kader , James A. Klaustermeyer , Charles C. Cheyney
At almost any stage of the handling process, lettuce may be exposed to ethylene gas, trace amounts of which can cause russet spotting.A common atmospheric pollutant, ethylene gas, can result in serious quality losses in lettuce. Exposure can occur anywhere in the handling process.
Furadan controls root weevil on strawberries
by Norman F. McCalley , Norman C. Welch
When applied as a bed sprag to weevil-infested strawberry plants after fall and winter picking, Furadan greatlg reduced populations of woods and cribrate weevils.Experiments conducted over two years showed Furadan sprays can give effective control of woods weevil and cribrate weevil on strawberries.
Control of Penicillium decay of garlic
by Arthur S. Greathead
Trials conducted in 1976 and 1977 showed that various fungicides, when used on cloves before planting, increased stand and yield of garlic.
Some principles and perspectives of agriculture
by Cecil E. Yarwood
editorial, news, letters & science briefs
Fish farming in California
by J. B. Kendrick
Research in progress