Research in progress: Trace elements in oral contrceptives

Also in this issue:

Our most important industry

A pressure machine for injecting trees

EFNEP: Helps low-income families improve diets

Fabric damage during laundering

Damage to fresh tomatoes can be reduced

Kinetin improves lettuce germination

Early rains alter range forage

Research in progress: Energy and water in California

Research in progress: New project environmental quality in lakes and streams

Research in progress: Drip irrigation

Research in progress: Mechanisms regulating enzymes

Research in progress: Salt-tolerant crops

Contrasting effects of acid and nonacid pummelos on the acidity of hybrid citrus progenies

Chandler—an early-ripening hybrid pummelo derived from a low-acid parent