Fertilizer trial with plums: Results of tests with Santa Rosa variety in principal plum growing area of Kern County determined by leaf analyses
California Agriculture 12(2):10-15.
Published February 01, 1958
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Two sets of experimental plots in 15-year old Santa Rosa plum orchards—on Marianna rootstock—were laid out north of Arvin in 1951. Orchard A had 75 trees per acre and was on Foster loam. Orchard B had 90 trees per acre on Hesperia fine sandy loam.