Fish farming in California

Also in this issue:

Agricultural mechanization and public policy

Bracken fern control with several herbicides

Sugar beet: An efficient user of soil nitrogen

Parasitic nematode seeks out navel orangeworm in almond orchards

Effects of prolonged drying and harvest delay following ethephon on walnut kernel quality

Avoiding ethylene concentrations in harvested lettuce

Furadan controls root weevil on strawberries

Control of Penicillium decay of garlic

Some principles and perspectives of agriculture

Research in progress

A diallel cross analysis of heading date in wheat