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WC Mn/Dakotas | You need to understand the methods they test by at each lab. Then you learn what whatever the results are mean in your field. Ph isn't as apt to change because of unequal soil division. K reports could vary dramatically if samples are not perfectly mixed. K results could be different depending on each lab extractents or methods. Some labs give recs based solely on ppm, some based on a certain cec, then if your cec is different you have to adjust rec yourself. Other labs may give recs based on ppm and cec. Bottom line is your probably not going to get the same answers no matter what. | |
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I sent some soil test to 2 labs
