California Agriculture, July 1961

Volume 15, Number 7
Radiant heat load reduction by shade materials tested

research articles

Influence of soil type on reforestation in Humboldt County
by D. W. Cooper
pp4, doi#10.3733/ca.v015n07p4
Abstract
Abstract Not Available – First paragraph follows: Forestry is the major source of income for Humboldt County, with more than 90% of its land area in wildlands. Approximately three quarters of the wildlands are in conifer forests and one quarter in rangelands.
Expanded Abstract | PDF

Study of young-growth timber taxation in Mendocino County
by Henry J. Vaux
pp5, doi#10.3733/ca.v015n07p5
Abstract
Abstract Not Available – First paragraph follows: An economic study of young-growth timber taxation—using Mendocino County as a case area—provides factual information and analysis for the work of the Joint Timber Taxation Study Committee.
Expanded Abstract | PDF

Evaluation of materials for livestock shades applicable to other open-type structures
by T. E. Bond , C. F. Kelly , W. N. Garrett , LeRoy Hahn
pp7-8, doi#10.3733/ca.v015n07p7
Abstract
Abstract Not Available – First paragraph follows: In animal environment investigations in the Imperial Valley the most economical means of reducing the heat stress of farm livestock during the summer months was provided by shades.
Expanded Abstract | PDF

Studies on beef cattle grazing irrigated forage as part of sound pasture management
by J. L. Hull , J. H. Meyer , G. P. Lofgreen
pp9-10, doi#10.3733/ca.v015n07p9
Abstract
Abstract Not Available – First paragraph follows: Sound pasture management must consider the requirements of both plants and animals and their interrelationships. One of the most important factors that can be controlled in a system of grazing management is the length of the regrowth interval of the forage between grazings. Tests recently conducted at Davis, during two pasture seasons, studied the effect of forage recovery intervals of 24, 30 and 36 days. The stocking rate was held approximately equal to obtain the same degree of grazing intensity.
Expanded Abstract | PDF

Experiments show protein supplements to be of dubious value with alfalfa
by Robert D. Appleman , Donald G. Addis , S. E. Bishop
pp10, doi#10.3733/ca.v015n07p10
Abstract
Abstract Not Available – First paragraph follows: Dairy cows fed a concentrate mixture containing 50% expeller-processed copra meal produced 0.12 pound per cow more butterfat daily than cows fed an equal amount of a high energy concentrate, lower in fat and in protein content.
Expanded Abstract | PDF

Field tests for effective control of flies in farm and ranch buildings
by I. Barry Tarshis , Morton Smith
pp11-13, doi#10.3733/ca.v015n07p11
Abstract
Abstract Not Available – First paragraph follows: Dibrom—in sprays or in sugar baits—gave successful fly control at a stock farm in Whittier, a cattle ranch in La Puenta, a dairy in Artesia, and a poultry ranch in Moorpark.
Expanded Abstract | PDF

Field tests for control of grape leafhoppers resistant to insecticides
by F. L. Jensen , E. M. Stafford , H. Kido , C. D. Lynn
pp13-14, doi#10.3733/ca.v015n07p13
Abstract
Abstract Not Available – First paragraph follows: The grape leafhopper in San Joaquin Valley vineyards has developed resistance to DDT, to malathion, and to Sevin. Resistance problems are most severe in the Orange Cove area, and extend beyond Orosi and Dinuba in Tulare County and beyond Reedley in Fresno County.
Expanded Abstract | PDF

Potential crop damage by the morning-glory leaf miner to sweet potatoes in California
by H. H. Shorey , L. D. Anderson
pp15, doi#10.3733/ca.v015n07p15
Abstract
Abstract Not Available – First paragraph follows: Sweet potatoes typically have fewer insect pest problems than do most other vegetable crops. However, a potentially serious pest in California which occasionally reaches outbreak proportions on sweet potatoes is the morning-glory leaf miner—Bedellia somnulentella Zeller.
Expanded Abstract | PDF

editorial, news, letters & science briefs

Green bunching onions
Editors
pp6, doi#10.3733/ca.v015n07p6a
PDF

Amino acid
Editors
pp6, doi#10.3733/ca.v015n07p6b
PDF

Cantaloupes
Editors
pp6, doi#10.3733/ca.v015n07p6c
PDF

Chemical reactions
Editors
pp6, doi#10.3733/ca.v015n07p6d
PDF

Ion absorption
Editors
pp6, doi#10.3733/ca.v015n07p6e
PDF

Barley breeding program
Editors
pp6, doi#10.3733/ca.v015n07p6f
PDF

General Information

Changes in costs of vegetable production in the 12-year period, 1947–1959
by Ben C. French
pp2-3, doi#10.3733/ca.v015n07p2
PDF