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Unformatted text preview: Answer: a. ppm K = 383.18 b. 766.36 lbs. K/acre 6" Example 3 . Convert 100 lbs. P/acre 6" to ppm P. Answer: 50 ppm P Example 4 . A 5 g soil sample is leached with NH 4 OAc for the determination of CEC. After distillation of the sample, 12.5 ml of 0.10 N H 2 SO 4 solution is needed to titrate the boric acid indicator to its endpoint. Calculate the CEC of the soil. Answer: 25 meq/100 g Example 5 . A lab reports a Ca/Mg ratio of 2.1 (meq Ca/meq Mg) and a concentration of Ca in your soil of 1600 ppm. Calculate: a. meq Ca/100 g soil b. meq Mg/100 g soil c. ppm Mg Answer: a. 8 meq Ca/100 g b. 3.81 meq Mg/100 g c. 462.9 ppm Mg...
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- Spring '08