Posted by Bob Bancroft on August 27, 2012 at 15:09:05 from (97.73.64.155):
In Reply to: Fertilizer posted by gitrib on August 27, 2012 at 13:23:18:
The problem I have is I think soil testing should be science, not voodoo. I have known several places who sent their samples out of state. Those tests always recommended K (potassium) for me. One year I told the dealer to split all the samples and send equal amounts out of state, and nearby. The in state lab showed me high in K, low P (phosphorus), directly contradicting the tests on the same samples out of state. So, what do I do? I read down the results papers and looked at their fertilizer recommendations. The out of state was ridiculously high on N. In state was actually a realistic amount. So I went with them, and have had positive results. I had checked a third of my soil every three years. It hasn't changed, so I've skipped a couple years. I'm putting on just a little more P than I need. It apparently would take a lot more to build up the soil for a high test. Last winter a friend gave me a soils book from the state land grant college from about 100 years ago. Guess what?! Nothing has changed. Their experiments all showed the best response was to P!
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