California Agriculture, August 1949
Volume 3, Number 8
Dehydration equipment for clingstone peaches
Root-lesion nematode injury: Trials under way to determine resistant or tolerant rootstocks for fruit and nut trees
by E. F. Serr, L. H. Day
Not available – first paragraph follows: The root-lesion—or meadow—nematode has been found widely scattered in California by United States Department of Agriculture and Experiment Station workers. In 1941 it was found associated with die-back of bearing sweet cherry trees in Riverside County. About the same time it was found on walnut trees showing poor vigor in Ventury County. Since then it has been identified on walnuts in several southern California counties and also in the San Joaquin, Sacramento, and Santa Clara valleys and Sierra Nevada foothills. Fig and olive roots have been reported frequently infested with this nematode. Apple, almond, peach, pear, plum, and quince roots have been reported infested.
Drift of sprays, dusts, spores: Radioactive tracers used in determining distribution pattern of small airborne particles
by R. N. Colwell
Not available – first paragraph follows: Spraying and dusting of agricultural crops with insecticides, fungicides, herbicides, hormones or fertilizers can be made more effective through accurate information as to the distribution pattern obtainable under various sets of conditions.
Egg production: Application of principles of genetics may hasten improvement of poultry
by I. Michael Lerner
This is the fifth article in a series of brief progress reports on the application of the science of genetics to commercial agriculture.
Timber growth studies: Tree growth in Whitaker's Forest, Tulare County, during 33-year period; 1915 to 1948
by Woodbridge Metcalf
Not available – first paragraph follows: Removal of old and overmature forest trees—and thinning to relieve competition in the young stands—can substantially increase the rate of timber growth.
Successful dehydration of clingstone peaches: Clingstone peaches can be dried successfully when proper procedure is followed carefully
by Herman J. Phaff, Emil M. Mark
Not available – first paragraph follows: Clingstone peaches can be dehydrated successfully—producing a dried fruit that has attractive appearance and pleasing flavor.
Citrus fruit size studies: Experimental test of 2,4-D sprays to increase orange and grapefruit fruit size
by Wm. S. Stewart, H. S. Hield
Not available – first paragraph follows: Further tests with 2,4-D sprays are necessary before any recommendations for their commercial use to increase fruit size are justified.
Soil test for phosphate: New method of chemical analysis of soil for available phosphate is rapid and accurate
by Frank T. Bingham
Not available – first paragraph follows: A new test for available phosphate in soils requires only standard laboratory equipment. It is rapid, economical and gives a better correlation with pot and field experiments than other extraction methods commonly used.
Downy mildew in spinach: Eventual control of damaging disease may be indicated by studies of Iranian spinach
by Paul G. Smith
Not available – first paragraph follows: Downy mildew—Peronospora spinaciae—is the most important disease of spinach—Spinacia oleracea—in California, where it frequently causes major damage to the crop.
Vitamins in walnut meats: Studies made to determine content of vitamins thiamine, riboflavin, niacin
by Mildred S. Jentsch, Agnes Fay Morgan
Not available – first paragraph follows: Placentia and Payne walnuts contain 20% to 30% more of the vitamins thiamine, riboflavin and niacin than do Fran-quette walnuts.
California apples: Acreage and production declining due to unfavorable grower earnings
by Burt B. Burlingame