《Table 5 The content of available potassium in tobacco-planting soil of Fuzhou city》

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《Evaluation and Analysis of Nutrients in Tobacco-Planting Soil in Fuzhou City》

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The test results（Table 5）show that the available potassium content of tobacco-planting soil in Fuzhou ranges from 20.6 to1 263 mg/kg，with an average of 152.5 mg/kg.The coefficient of variation is 83.49%，indicating large variation.Among them，soil samples with a content of less than 80 mg/kg account for21.83%，and those with a content of 80-150 mg/kg account for42.96%，which together account for 64.79%.In addition，soil samples with the content of 150-220 mg/kg account for18.31%，and 11.27%for the content of 220-350 mg/kg.It indicates that the available potassium content of most tobacco-growing soils in Fuzhou is insufficient.