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Fertilizer recommendations for producing shade trees in nursery field soil in North America appear to be based on tradition and tree performance; there is little empirical data. This study was designed to examine efficacy of reducing traditional or historical fertilizer amount (rate) and number of applications for two taxa and to present a protocol for growers to test fertilizer use efficiency. A traditional rate of fertilizer was applied along with four others: zero, one-third, two-thirds, ordoi:10.48044/jauf.2014.018 fatcat:7qd3on7ierbnvlzqmmctcrxdf4