Soil carbon dioxide and black spot in potatoes

Also in this issue:

Relationship of air freight rates to out-of-state cut flower sales

Irrigation costs of pumping in the San Joaquin Valley

Danger of wildfires reduced by prescribed burning in ponderosa pine

Fertilizer trials with Shasta and Lassen strawberry varieties in three producing areas

Old home pear trees show resistance to decline when on own roots

Old home pear rootstock propagated by hardwood cuttings

Effects of the green peach and bean aphids on table beet seed plants

Adverse effect of gibberellin on bud development in some stone-fruit plants

Leaf and soil analyses as guides for citrus fertilizer practices in southern California orchards

Role of pantothenic acid in embryonic development

Inventory of uplands by soil-vegetation survey

Impact loads for forming hay wafers

Irrigation distribution of water soluble additives

Survey of soil-inhabiting insects

Measurements of water transfer in soil

Aphid control on carnations

Malo-lactic fermentation of wines

Storage of vegetable seed

Progress in breeding of hybrid carrots

Studies on the causes of sheep pneumonia

The susceptibility of perennial delphiniums to six viruses

Leaf variegations of perennial delphiniums

Viroses of annual larkspurs