California Agriculture, March 1950
Volume 4, Number 3
Deferred grazing of irrigated pastures
Orange fruit sizes: Potassium applications increase Size Of fruit in long-term fertilizer studies
by E. R. Parker , Winston W. Jones
Not available – first paragraph follows: Fertilizers which supply potassium to the soil increased the size of orange fruits during a long-term fertilizer experiment at Riverside.
Inbreeding: Investigations with dairy cattle indicate inbreeding can lead to desirable or undesirable results
by W. C. Rollins
Not available – first paragraph follows: Inbreeding can lead to increased uniformity within the inbred stock, increased prepotency in outcrosses, production of abnormal types, and symptoms of decline in vigor.
Deferred grazing irrigated pasture ungrazed during fall permits plant regrowth
by C. R. Horton
Not available – first paragraph follows: Irrigated pastures as a source of summer feed excel any forage crop, except possibly, alfalfa.
Timing of spray treatments for codling moth: Control on Payne walnuts in northern California influenced by size of nuts when sprayed
by A. E. Michelbacher , W. W. Middlekauff , Edward Wegenek
Not available – first paragraph follows: The codling moth is one of the most important pests of Payne walnuts.
Spray residues: On apricots after codling moth sprays, 1950 recommendations
by Arthur D. Borden , Harold Madsen , Stanley Benedict
Not available – first paragraph follows: The problem of spray residues on apricots has received considerable attention the past two seasons largely due to the necessity of applying control measures for codling moth. Without this control the grower and processor are confronted with heavy losses due to wormy fruit and if sprays are applied, there will be minimum amounts of the spray chemical in canned or dried fruit.
Mite populations on grapes: Effect of sulfur dust treatments on predatory mites and red spider mite
by Leslie M. Smith
Not available – first paragraph follows: The annual rise and fall of populations of the Pacific mite—Tetranychus pacificus McG—and the Willamette mite— Tetranychus willamettei McG—on grapes has puzzled growers and entomologists for years. In the fall of 1949 the last explanatory link was supplied.
Nitrogen fertilizer: California deciduous fruit orchards respond in variety of ways due to individual conditions
by E. L. Proebsting
Not available – first paragraph follows: Nitrogen is the only fertilizer applied to a substantial acreage of deciduous fruit orchards in California. Usually the first limiting nutrient in the production of those orchards is nitrogen. Only a part of the total deciduous acreage has reached a level where response to nitrogen fertilizer is obtained.
Wind borne pest: Omnivorous leaf tier controlled readily by insecticide treatments
by A. Earl Pritchard , W. W. Middlekauff
Not available – first paragraph follows: Satisfactory control of the omnivorous leaf tier—Cnephasia longana—can be obtained with either DDT or dichlorodiphenyl dichlorethane when used at a rate of two pounds of the 50% wettable powder per 100 gallons of water.
editorial, news, letters & science briefs
Poultry husbandry report, 1949: Progress report of advances in poultry research conducted during 1949 by the staff of the division
Marketing: Agreements and orders regulating sales have effect of law
by George L. Mehren