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--- library:articles:soil_test_p_and_k_buildup_and_drawdown 2011/11/21 16:16
+++ library:articles:soil_test_p_and_k_buildup_and_drawdown 2011/11/21 16:17 current
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-With soil test K, most agronomists use a K buildup rate of 3 or 4 1b./acre K<sub>2</sub>O: 1 lb./acre soil K (6 or 8 lb./acre K<sub>2</sub>O:1 ppm soil K). However, research indicates that, like P it depends somewhat on what the initial soil test is, plus other factors. Research at the University of Kentucky (Table 5) looked at this question in 1990 and found the following buildup ratios for one soil.
+With soil test K, most agronomists use a K buildup rate of 3 to 5 1b./acre K<sub>2</sub>O: 1 lb./acre soil K (6 or 10 lb./acre K<sub>2</sub>O:1 ppm soil K). However, research indicates that, like P it depends somewhat on what the initial soil test is, plus other factors. Research at the University of Kentucky (Table 5) looked at this question in 1990 and found the following buildup ratios for one soil.
 ^ Table 5: Amounts of Excess Addition Over Removal Required To \\ Change Soil Test K (Lb K<sub>2</sub>O/Lb  Soil Test K) At A Given Soil Test.  ||
 ^  Initial Soil Test K (lb K/acre)  ^  K<sub>2</sub>O Required (lb K<sub>2</sub>O/lb K)  |