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Entry Date
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Nick Name
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Location
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Monday, January 27, 2025
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Little Ketchup
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Grittyville, WA
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Entry 30 of 31 |
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I wanted to use promix as my control but this will have to do. I did some calculations to try to get a sense of how much fertilizer is in this potting mix. By my calculations, spreading a 4" layer of this potting mix over an acre would add 600 lbs of nitrogen. So its pretty rich stuff. (It says its .21% nitrogen.) I think that is right about what the competitive corn bushel growers would use, but dont quote me on that.
I also got these little sample packs of Jacks fertilizer in the seed exchange and a sample of Holland's kick-a-poo fertilizer. I thought maybe I'd try these. I calculated out what adding one sample pack to the test tube would be equivalent to, and I would be adding the equivalent of 90 lbs of Jacks per 1,000 feet. So that seems a bit rich but really I think maybe its spot on. Well, it would be equivalent to 800 lbs per acre of nitrogen. Which is crazy high but we're trying for even more production than the high bushel corn growers, right? I'm saying that would be spread down through the soil profile to a depth of 2-3 feet though. So I dont think the EC would be off the charts. The ag sites say divide the lbs per acre by two to get the ppm. So that would be 400 ppm. Which is too much. But thats actually giving the rate per acre furrow slice which is 6.7". So if that much fertilizer is getting spread to a depth of, say, 32"... then the ppm gets divided by about 5 which = 80 ppm nitrogen.
I dont know if this is correct, I'm just trying to figure this out as a layperson I'm not an agronomist (I should have been one?)
But that seems perfectly ok, perfect really.
So I can now set up four or five test tubes with different fertilizers and/or amendments and see how the plants perform. It might be a stupid experimant but Im already learning, just setting up the experiment is forcing me to think and learn, even though I may not learn much from the experiment itself.
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