Hybrid vigor in sweet potatoes

Also in this issue:

Merchandising nursery stock in California

Studies on wind protection efficiency of slatted fence windbreakers

Need for potassium fertilizer on cotton determined by leaf and soil analyses

New insecticides against orange tortrix tested on apples near Watsonville

Use of herbicides in transplanted celery: In southern California

Use of herbicides in transplanted celery: In northern California

Control of fruiting by plant regulators

Strong winds, dry air and water use by crops

Double cross hybrid varieties in ladino clover

Chemotherapy of bee diseases

Chemotherapy of bee diseases

Resistance to clubroot disease of Brussels sprouts

Non-flowering strains of herbage grasses

Non-flowering strains of herbage grasses

Aspects of citrus fruit growth studied in tissue cultures

The effects of phosphorus deficiency on citrus

The effects of sulfur deficiency on citrus

Species of Stigmina and Stigmella occurring on Platanus