Sodium in lemon tree collapse: Analyses show high sodium concentrations in the roots of collapsing trees are result of tree condition, not the cause
AuthorsD. R. Rodney
R. B. Harding
S. B. Boswell
F. L. Whiting
Authors AffiliationsD. R. Rodney is Assistant Horticulturist, University of California, Riverside; R. B. Harding is Assistant Chemist, University of California, Riverside; S. B. Boswell is Principal Laboratory Technician, University of California, Riverside; F. L. Whiting is Senior Laboratory Technician, University of California, Riuerside.
Hilgardia 10(9):4-12. DOI:10.3733/ca.v010n09p4. September 1956.
An answer to whether high concentrations of sodium found in roots of lemon trees severely affected by decline—collapse—were the cause or the result of the tree's condition was the objective of a series of analyses of root and soil samples.
Also in this issue:Lemon industry in California: Market interactions among fresh lemons and lemon products affect consumer purchase behavior, grower prices, and returns
Declining citrus root systems: Relationship of root systems to top growth and production investigated in citrus orchard rejuvenation program studies
Nematode resistance in peaches: Resistance to two widespread species of root-knot nematode ranged from almost immunity to none in peach seedling study
Calico scale on walnuts: Problem of soft scales on walnut increasing but natural enemies still exert suppressing influence on calico scale
Fruit cooling by forced air: Portable unit designed to cool fruit in orchard at harvest reduces usually required 12-hour cooling period to 1 1/2 hours
Control of powder-post beetles: Complete kills of Lyctus beetles infesting hardwood floors achieved in 5–10 minute applications of infrared radiation
Chlorine in plant nutrition: Experiments with plants in nutrient solutions establish chlorine as a micronutrient essential to plant growth
Gains of two types of lambs: Suffolk-Corriedale crosses gained faster and weighed more at weaning than Corriedale crosses during comparative study
Seedling growth on burned soil: Effect of prescribed burning on soil fertility reflected by the growth of pine seedlings in study of nutrient response
Drought-tolerating ornamentals: Natives and introductions from like climates require little water or maintenance and are adaptable to rural landscape
Ornamental flowering plants experimentally infected with curly top
Negative evidence on multiplication of curly-top virus in the beet leafhopper, Eutettix tenellus