The chemical status of zinc in the soil with methods of analysis
AuthorP. L. Hibbard
Author AffiliationsP. L. Hibbard was Chemist in the Experiment Station, Emeritus.
Hilgardia 13(1):1-29. DOI:10.3733/hilg.v13n01p001. January 1940.
Abstract does not appear. First page follows.
Zinc has long been known to occur in the soil in minute amounts, but little is known about the forms in which it occurs and the extent to which it occurs in forms available to plants. Rather recently, zinc deficiencies have been shown to be a cause of certain disorders of plants. In California an elaborate, systematic investigation has been made of the relation of zinc to little-leaf of deciduous fruit trees and to mottle-leaf of citrus trees; the history of this investigation and a review of literature on the subject is given by Chandler (6)4. These discoveries have emphasized the need for a laboratory test for available zinc in soils.
Twenty or thirty years ago, a few European workers reported studies on zinc naturally present in soils and on its importance as a plant nutrient.
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Alfalfa wafers for dairy cows: No significant differences detected between alfalfa wafers and alfalfa hay in feeding trials with lactating heifers
Alfalfa and sorghum silages: Experiments indicate no difference between sweet forage-type sorghum and dual purpose-type when fed as silage to steers
Abnormalities in tomato fruits: Effects of fruit-setting plant hormones and nitrogen level in relation to quality and storage life of tomatoes studied
Quality study on strawberries: Experiments with Shasta berries show harvested fruit should be protected against the effects of high field temperatures
Control of drywood termites: Infestation or reinfestation after eradication prevented by treatment with inert dusts nontoxic to humans or animals
Peach tree borer on apricots: Trunk treatments for the control of major pest of apricots, prunes, plums, and peaches in the coastal growing districts
Zinc effect on citrus, avocado: Large concentrations of zinc added to sand or soil cultures corrected mottle-leaf, increased leaf size and tree growth
Micronutrients in valencias: Study made on the effects of nitrogen fertilization on the micronutrient concentrations in leaves of Valencia orange