Scottville, 49454 Northwest Michigan |
Have any of you taken soil samples from depths deeper than the traditional 6 inches? Below are the results I found from one set of tests.
Frankly, I was a bit surprised to find nutrient levels this high at depths down to 24 inches. But what should I make of it?
Our fertilizer recommendations are based on soil sample results from a 6 inch core. If a recommendation of "X" is based on a soil test level of "Y" at 6 inches.... can we divide the recommendation by 4 if we have the same test level of "Y" from a full 24 inch sample?
What say you,
gordon
| | 0 to 3" | 3" to 6" | 6" to 9" | 9" to 12" | 12" to 24" | | | | | | | | | organic matter | 4.8 | 4.8 | 3.7 | 2.6 | 1.5 | | bray 1 phosphorus (PPM) | 78 | 66 | 48 | 42 | 10 | | potassium (PPM) | 268 | 231 | 189 | 147 | 99 | | Mg (PPM) | 380 | 410 | 445 | 465 | 475 | | Ca (PPM) | 1850 | 1950 | 1950 | 2150 | 4400 | | PH | 7.1 | 7.3 | 7.4 | 7.5 | 7.8 | | CEC | 13.1 | 13.8 | 13.9 | 15 | 26.2 | | %K | 5.2 | 4.3 | 3.5 | 2.5 | 1.0 | | %Mg | 24.2 | 24.8 | 26.6 | 25.8 | 15.1 | | %Ca | 70.6 | 70.9 | 69.9 | 71.7 | 83.9 | | sulfur | 9 | 8 | 7 | 8 | 7 | | Zn (PPM) | 8.90 | 8.00 | 5.70 | 6.00 | 2.20 | | Mn (PPM) | 30 | 29 | 30 | 31 | 38 | | Fe (PPM) | 118 | 137 | 141 | 127 | 45 | | Cu (PPM) | 4.4 | 4.4 | 3.5 | 2.4 | 1.7 | | B (PPM) | 1.3 | 1.2 | 0.9 | 0.8 | 0.4 |
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24 inch soil samples
