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Walnut orchards on volcanic soils deficient in phosphorus
Author
E. F. SerrAuthor Affiliations
E. F. Serr is Pomologist, University of California, Davis.Publication Information
Hilgardia 14(6):6-7. DOI:10.3733/ca.v014n06p6. June 1960.
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Abstract
During a period of abnormally high temperatures in 1954, severe leaf burning occurred in hillside plantings of walnuts in Lake County. Browning and drying of irregular areas in the walnut leaflets were followed by progressive dropping of entire leaflets, starting with the basal pair. The leaf analyses suggested phosphorus deficiency.
Serr E. 1960. Walnut orchards on volcanic soils deficient in phosphorus. Hilgardia 14(6):6-7. DOI:10.3733/ca.v014n06p6
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