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Slownickel lounge, pull up a chair. CEC interpretation

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Avenger

Avenger

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https://www.google.com/patents/US6074988


raw, sungro brand peat(75%)/perlite(25%) analysis, no limestone included, unsure which extractant was used, but i think it was just SME.
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D

daddylonglegs

plantingplants said:
Anyone have any book suggestions, besides More Food From Soil Science? Need some bedtime reading that isn't a lit screen so I can sleep better. All I know I learned from you guys, so it's all second-hand information, which can be awesome because you guys filter it through experience and knowledge, but also bad because I don't always get the context or the details.
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Have you picked up teaming with fungi yet ? The first two the trilogy were good and the third just came out ... so far so good :tiphat:
 
O

orechron

Member
Bulldog, peat always varies. Swings from 4.5-6.2pH based on the analyses I've seen. This was my latest:


This place wouldn't let me bring in clay from offsite and I was stuck using their high Mg inputs. Compost as a K amendment and a bunch of gypsum...
 
led05

led05

Chasing The Present
HazyBulldog said:
Anybody have a peat moss sample? I am getting high Mg in a mix I haven't added any Mg to in a year. Thinking the peat I added was high in Mg. Any help would be great.
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Bull, I meant where was it stored since you've had it or how has it been used for the past year? In bins, on the ground, in your gardens etc...

Peat will pick up Cations in the soil and release H, especially Mg if it's around so effectively concentrating it in your sample at the expense of H, especially if it's outside and getting wet/dry cycles. It's why I asked where it's been stored since you've had it, that could be where the phantom Mg is coming from. Also some of the items you added to this "mix" may have Mg in them that aren't supposed too, or advertised as such or that may have been in something you didn't realize it was?

Peat is also all over the place, even from same companies, probably somewhat due to the above mentioned reasons
 
maxmurder

maxmurder

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plantingplants said:
^^^^ hhaaha review on amazon of that book:



edit; fuck i looked at a couple pages with amazon's 'look inside'.. this is exactly what i want. i don't think i've ever spent $100 on a book but this is an easy decision.
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100? I looked on amazon and could only find 250....
 
plantingplants

plantingplants

Active member
Hazy, it's not phantom Mg... Across commercial products, peat ranges from 14-38% Mg saturation with an average of 25%. Cec also varies.

maxmurder, there was only two left last night.
 
plantingplants

plantingplants

Active member
So if I wereto take the peat and the coco in orechron's post and mix them half and half, i could almost exactly calculate what the soil test ppms should be right? Eg if coco has 2500 K and peat has 100, it should show 1300 ppm if they weremixed 50/50? Does the CEC work the same way? Can you reliably predict how a base mix will turn out by just doing this math?
 
R

reppin2c

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So far a good read. What I've learned is I can make it 15 pages before ADD comes on strong and I'm thinking about all kinds of shit. Maybe I need a pop up book or tutor like on van wilder haha write that down

Edit just checked page 13 lmao
 
J

jidoka

Active member
17crop.jpg

So the first 4 columns are raw mixes with no amendments. Tests for new soil this yr. The first 3 are different top soils...the blend in all 3 is 50% top soil, 25% peat and 25% pumice. Somehow I suspect the Tan top soil was taken pretty close to a gypsum mine...stuff drains great though.

The black is the mix I used last year and will be again this yr. Further experiments will be done using the tan as an admendment but it ain't making this yrs grow.

The indo is 50% peat, 25% tan and 25% pumice. I accomplished the 85% Ca with an acid soil. But you can see I got no Mg or K really. It might be interesting to see if I could feed those but I don't have the time right now.

whde is my actual indoor mix. Started out life at least 5 yrs ago as Black Gold Natural and Organic and no telling how often it has been tinkered with. Appears to be time for a little gypsum
 
growingcrazy

growingcrazy

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jidoka said:
View attachment 403602

So the first 4 columns are raw mixes with no amendments. Tests for new soil this yr. The first 3 are different top soils...the blend in all 3 is 50% top soil, 25% peat and 25% pumice. Somehow I suspect the Tan top soil was taken pretty close to a gypsum mine...stuff drains great though.

The black is the mix I used last year and will be again this yr. Further experiments will be done using the tan as an admendment but it ain't making this yrs grow.

The indo is 50% peat, 25% tan and 25% pumice. I accomplished the 85% Ca with an acid soil. But you can see I got no Mg or K really. It might be interesting to see if I could feed those but I don't have the time right now.

whde is my actual indoor mix. Started out life at least 5 yrs ago as Black Gold Natural and Organic and no telling how often it has been tinkered with. Appears to be time for a little gypsum
Click to expand...

Whats up with the zinc concentration on whde?
 
J

jidoka

Active member
One ratio that seems to be pretty important is the P:Zn. But with the crazy high P most of us run, me included in this soil pretty much every pic of mj you see has a Zn def.

My actual P in this soil as about 700 ppm. I have Zn defs. If I had the balls I would jack Zn up to 70 ppm and then fight with it blocking other micro cations

So it is a compromise where I end up spraying Zn every grow.

I am either really attached to that soil or too fuckin lazy to replace it with a lower P version. So I live with it. But you ain't seeing high P in me outdoor mixes.

Quality is significantly tied to micros.
 
R

reppin2c

Well-known member
Veteran
Jidoka in that whde soil how much Si are you burning though every run? And check that ec haha.

Black+vansil FTW
 
plantingplants

plantingplants

Active member
Yea why dont we have nutrient drawdown #s for drug cannabis? Theyre probably out thre for hemp but not very accurate..

Lmao the tan. Is that all clay? Thats a lot of Ca andhigh cec... Probably good for spiking? Havent tried that yet.

Some of those are high ph, why no aa8.2? Couldnt a lot of that ca in thw topsoil exist as co3?
 
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