Slownickel lounge, pull up a chair. CEC interpretation - Page 420 - Cannabis Botany and Advanced Growing Science - International Cannagraphic Magazine Forums

Hemphrey Bogart · 03-24-2018, 04:27 PM

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slownickel · 03-24-2018, 11:20 PM

Happy Page 420!

Boss Cocky · 03-25-2018, 12:33 AM

Hi slownickel and all,

I’ve been bumbling along trying to follow organic soilless mixes like LC’s mix and build-a-soil here in oz with local ingredient substitutions. I’ve been getting horrendous results making grave mistakes because of not knowing the science. After reading the first 40 pages of this thread and most of Steve Solomon’s book, “The Intelligent Gardener,” I think my chief mistake has been ignorantly using a kelp extract with 16% K instead of kelp meal with 3% K.

Slow, I take it from what I read here that you disagree a little with Solomon on nutrient levels and balance. I’ve picked up here that S should equal P and Mn should equal Fe. Would you or someone else point me to a post where you’ve given a comprehensive outline of of acceptable ranges of the nutrient levels expressed in mg/L?

I’m wanting to use coco/perlite/worm castings or coco/castings as the substrate. A concern here is using sulphate forms of the base cations in order to keep the ph down. This will put S levels way above P. Is this a problem? Is there an upper limit for S?

I notice that build-a-soil put Langbeinite in their mineral mix for use in coco. This seems counter-intuitive to me as K is much higher in Langbeinite than Mg and coco already has a lot of K. Am I missing something here?

Another question is regarding the AFP of the substrate. The coco I have access to has an AFP of 26.2%. I note also that some grades of peat have an AFP at or above this level. Is this high enough to dispense with the perlite? What level of AFP are we targeting in the final mix?

Thanks in advance,
Boss Cocky

Hermen_eutics · 03-25-2018, 09:41 PM

Quote:

Originally Posted by growingcrazy

Ca-85.8
Mg-9.4
K-3.7
Na-.94

Buffer pH isn't calculated when the pH is @ 7.

Ca is based on aa@8.2, K and Mg are M3. Na is highest whether m3 or aa@8.2.

Calcium numbers on the m3 tests are over estimated, that is why the USGA started using AA for Ca numbers in the base.

Looking at Hermans results, You need lots of P, Your micro's are crazy high... Cu is way high and Zn is above the normally rec. maximum...

Add P, a touch of K to get to 4.5%, run it and see what happens.

Look folks no gypsum!

Badfishy1 · 03-26-2018, 02:50 AM

Looking good Herman

growingcrazy · 03-26-2018, 04:24 PM

Quote:

Originally Posted by Hermen_eutics

Look folks no gypsum!
View Image View Image View Image

Those are going to fill in nicely!

EasyGoing · 03-26-2018, 04:47 PM

little low on Mg?

VortexPower420 · 03-26-2018, 04:48 PM

Is that colts foot in you pots?

Hermen_eutics · 03-26-2018, 08:46 PM

@bad fish: tyvm
@gc: Ya, (fill in nicely) i can see it. Ive grown this plant a few times but Ive never had this many bud sites so im thinking i need to be more heads up on nutritional needs through flower.

@ Easy: I try to keep Mg at low/healthy threshold levels. What symptom of lowish Mg caught your attention?

@ VP: Nah, it think it's a pea or maybe a cucurbit. I used BAS clover mix as a cover. This plant is jubilant. Ive cut it back 3-4 times. It's about to throw a flower or two. I'll be able to ID then. Colts foot, very intriguing. I didn't know that plant.

EasyGoing · 03-26-2018, 08:52 PM

Second pic, fan leave looks like it has some rust spots. From post #4194 Fan leaf flipped backwards behind your writing of the bottom right. Bulldog has eagle eyes, lol

Very slight, plants look great.

03-24-2018, 04:27 PM	#4191
Hemphrey Bogart Senior Member Join Date: Jun 2009 Posts: 1,203	. __________________
	2 members found this post helpful.

03-24-2018, 11:20 PM	#4192
slownickel IC Mag Supporter Join Date: Oct 2008 Posts: 2,149	Happy Page 420! __________________ OH IF A MAN TRIED TO TAKE HIS TIME ON EARTH AND PROVE WHAT A MAN IS WORTH I WONDER WHAT WOULD HAPPEN TO THIS WORLD -Harry Forster Chapins' Tombstone
	4 members found this post helpful.

03-26-2018, 02:50 AM	#4195
Badfishy1 Member Join Date: Dec 2016 Posts: 663	Looking good Herman
	1 members found this post helpful.

03-26-2018, 04:47 PM	#4197
EasyGoing Member Join Date: Jul 2017 Posts: 670	little low on Mg?
	1 members found this post helpful.

03-26-2018, 04:48 PM	#4198
VortexPower420 Member Join Date: Feb 2012 Location: The Right Coast Posts: 712	Is that colts foot in you pots? __________________ From a place of privlage, equality seems like oppression. - unknown
	1 members found this post helpful.

03-25-2018, 12:33 AM	#4193
Boss Cocky Member Join Date: Jul 2015 Posts: 61	Hi slownickel and all, I’ve been bumbling along trying to follow organic soilless mixes like LC’s mix and build-a-soil here in oz with local ingredient substitutions. I’ve been getting horrendous results making grave mistakes because of not knowing the science. After reading the first 40 pages of this thread and most of Steve Solomon’s book, “The Intelligent Gardener,” I think my chief mistake has been ignorantly using a kelp extract with 16% K instead of kelp meal with 3% K. Slow, I take it from what I read here that you disagree a little with Solomon on nutrient levels and balance. I’ve picked up here that S should equal P and Mn should equal Fe. Would you or someone else point me to a post where you’ve given a comprehensive outline of of acceptable ranges of the nutrient levels expressed in mg/L? I’m wanting to use coco/perlite/worm castings or coco/castings as the substrate. A concern here is using sulphate forms of the base cations in order to keep the ph down. This will put S levels way above P. Is this a problem? Is there an upper limit for S? I notice that build-a-soil put Langbeinite in their mineral mix for use in coco. This seems counter-intuitive to me as K is much higher in Langbeinite than Mg and coco already has a lot of K. Am I missing something here? Another question is regarding the AFP of the substrate. The coco I have access to has an AFP of 26.2%. I note also that some grades of peat have an AFP at or above this level. Is this high enough to dispense with the perlite? What level of AFP are we targeting in the final mix? Thanks in advance, Boss Cocky

03-26-2018, 08:46 PM	#4199
Hermen_eutics Member Join Date: Dec 2017 Posts: 66	@bad fish: tyvm @gc: Ya, (fill in nicely) i can see it. Ive grown this plant a few times but Ive never had this many bud sites so im thinking i need to be more heads up on nutritional needs through flower. @ Easy: I try to keep Mg at low/healthy threshold levels. What symptom of lowish Mg caught your attention? @ VP: Nah, it think it's a pea or maybe a cucurbit. I used BAS clover mix as a cover. This plant is jubilant. Ive cut it back 3-4 times. It's about to throw a flower or two. I'll be able to ID then. Colts foot, very intriguing. I didn't know that plant.

03-26-2018, 08:52 PM	#4200
EasyGoing Member Join Date: Jul 2017 Posts: 670	Second pic, fan leave looks like it has some rust spots. From post #4194 Fan leaf flipped backwards behind your writing of the bottom right. Bulldog has eagle eyes, lol Very slight, plants look great.
	2 members found this post helpful.