Soil savvy results

Discussion in 'Organics' started by DynamiteBob, Jul 3, 2018.


    DynamiteBob Well-Known Member

    Jumping on the soil savvy bandwagon! I’ve never had my soil tested (it’s on its 3rd cycle of no till) so it was definitely necessary. I’m glad I did it! Look at these results. The calcium and magnesium are off the charts which is crazy seeing as I’m always showing what seems to be a mag deficiency. I guess this next run I’m just going to add some kelp/rock dust for micros.

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    Last edited: Jul 3, 2018
    Capn-Crunch and DonTesla like this.

    DonTesla Well-Known Member

    Congrats, dude!

    Any clawing from N toxicity?!

    MustangStudFarm Well-Known Member

    I think that the real problem is the micro deficiency. I am currently going through the same problem and apparently Zn and Mn def is DEVASTATING!!! It could be caused by high P or sandy soil, or just a lack of input to begin with... The article that I read actually used the word devastating when referring to micro def. Question is, how do you fix it... The test is like an X-Ray and you ID'ed the problem, but how do you fix broken bones. Rock dust is too slow to break down and large amounts of kelp with cause Na build up. The compost that I was making had extreme excess of phosphorus and locked out Fe and Micros. It's a catch 22 with compost...
    Rasta Roy

    Rasta Roy Well-Known Member

    There are some pretty inexpensive liquid iron and zinc combo fertilizers that are intended for grape growers...but work really well at boosting the levels of the micros in your soil for cannabis too. A few small applications throughout the grow are all that's really needed. if you've got a good soil it will hang on for a while.

    And I wouldn't say it's a catch 22 of compost...but just how phosphorus is. Your compost could have five percent nitrogen and 1 percent phosphorus. Your nitrogen will be gone in a few weeks yet the phosphorus will remain until your next two grows.
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    Miyagismokes Well-Known Member

    I run into this with magnesium, but it's because my recipe is imperfect...
    Rasta Roy

    Rasta Roy Well-Known Member

    langbeinite or sulfate of potash magnesia is a great way to make sure your magnesium and potash levels are solid. and you really only need a pinch and a half per cubic foot. Recycled soil, 1 cup of fish meal, 1/2 cup of gypsum, and 1/8 cup of langbeinite per plant is what I've done for my recent grow and i've got no deficiencies to speak of.

    Miyagismokes Well-Known Member

    It's not a deficiency per se, occasionally my mg gets high because I use dolomitic lime, so the ratio isn't exactly so.
    I feel like it's due to leftover mg from previous.
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    Rasta Roy

    Rasta Roy Well-Known Member

    Yeah dolomite lime has a reputation for doing that. Once you've used the dolomite for your initial soil, you really don't need to use it again as long as you have other calcium inputs. Most bone meals or crustacean meals will give you all the calcium you need on your future uses.
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