Frost protection in peaches: New model under-tree wind machine tested with and without burners in orchard near Wheatland during winter of 1958–59
AuthorsTodd V. Crawford
F. A. Brooks
Authors AffiliationsTodd V. Crawford is Assistant Agricultural Engineer, University of California, Davis; F. A. Brooks is Agricultural Engineer, University of California, Davis.
Hilgardia 13(8):3-6. DOI:10.3733/ca.v013n08p3. August 1959.
Tower mounted wind machines raise orchard temperatures largely by the forced mixing of cold orchard air with the warmer air overhead. However, tests in an almond orchard in the Chico area –in 1955 and 1957–showed that the air jet from tower mounted machines had difficulty in penetrating the tree canopy –typical of deciduous orchards–formed by the intertwining of branches of adjacent trees. Underneath the tree canopy deciduous orchards are relatively open but growers report that most frost damage occurs in the lower part of the trees.
Also in this issue:Irrigation districts: Payment complex of land assessment and water tolls key tool for pricing policy
New winter rye: Productive winter annual cereal grain has high fertility in California tests
High phosphorus for alfalfa: Plant analysis used to evaluate phosphorus status of alfalfa fields as guide to fertilizing for better yields and returns
Lime effect on soil properties: Studies made on the effect of massive lime applications on physical properties of five types of Sacramento Valley soils
Rice water weevil: Beetle pest in rice growing areas of southern states discovered in California
Corn earworm in grain sorghum phosdrin and thiodan: Show promise as substitutes for DDT in two experiments with aerial applications to infested fields
Strip-treatment with chemicals: Satisfactory commercial control achieved in orange orchard program designed to conserve natural enemies of citrus pests
Subtropical insects: Reference on subtropical fruit pests and control measures now in one volume
Inclusions in guard cells of tobacco affected with mosaic
Phloem anatomy of tobacco affected with curly top and mosaic