Can the ozone layer be restored?

Also in this issue:

PM-10 - the unknown compound

Science Briefs

Sky's reflection repels aphids

Research update: Researchers try to arrest fugitive dust

Study demonstrates ozone uptake by SJV crops

Early irrigation cutoff has little effect on French prune production

Early harvest prevents internal browning in Asian pears

Alternate-year walnut pruning can boost yields, cut cost

Livina mulches suppress aphids in broccoli

A model of the flight phenology of the beet armyworm (Lepidoptera: Noctuidae) in central California

On-farm nitrogen tests improve fertilizer efficiency, protect groundwater

Field procedure helps calculate irrigation time for cracking clay soils

On some tree species, annual sprays may control western poplar clearwing moth