led05
Chasing The Present
btw, for those interested.... It's Cheaper (substantially) to buy in Germany direct than the UK link provided earlier
https://www.pronova.de/en/content/ppet-2000p
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Slownickel lounge, pull up a chair. CEC interpretation
- Thread starter slownickel
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btw, for those interested.... It's Cheaper (substantially) to buy in Germany direct than the UK link provided earlier
https://www.pronova.de/en/content/ppet-2000p
Hermen_eutics
Member
Tests show soil test from December then retested after one months time, flushed with rain water and biomin calcium powder. Not really the changes i was shooting for. K still way high and S crazy high. posted for reference sake and even more so to hear suggestions/recommendations and observations.
Thanks for sharing the expertise gents.
Run your CEC base numbers on that. Post them. Your doing fine.
I ran them myself on his second pic using the m3 PPM- but there was no buffer number. Do you just use the soil pH number alone for H+? Edit: found my answer.
And then may I ask, why are our saturation % numbers listed in the results different from our Base % calculations? Edit: nvm, found my own answer. And should we run the @8.2 numbers in the same fashion?
And then may I ask, why are our saturation % numbers listed in the results different from our Base % calculations? Edit: nvm, found my own answer. And should we run the @8.2 numbers in the same fashion?
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paradoxlost
Member
Does spectrum test for total carbonate content in the soil? Or does anyone have carbonate data for their soil, calcium content, and calcium content at pH 8.2
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 [email protected], K and Mg are M3. Na is highest whether m3 or [email protected].
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.
Mg-9.4
K-3.7
Na-.94
Buffer pH isn't calculated when the pH is @ 7.
Ca is based on [email protected], K and Mg are M3. Na is highest whether m3 or [email protected].
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.
Hermen_eutics
Member
GC, thanks for taking a look. Can you please explain how i "run my cec base numbers" ? Soil science pre-school is what im working with.
Do we need a soil math 101 thread? If we can get some others (Led, Easy, Doka, Slow etc) to keep sharing knowledge on the same subject it would be very helpful for those not in the know...
I understand that what is being talked about here is at step 6 of the system and isn't really teaching the building blocks to get to that step.
Most people don't have a clue what CEC is, let alone what numbers to use to calculate it or even where to find them... If you don't know the vocabulary, how the hell do you research it, right? lol
Let's see what we can come up with, I want to get this all into a more user friendly format. People like you, Hermen are what make this fun... Thanks!
https://48ktyk3qffzqgswttcx2dv5i-wp...-Exchange-Cap-and-Percent-Base-Saturation.pdf
Wrap your head around that and come back with any questions you may have. Use the m3/aa numbers as I posted above along with the formulas in that link. I have found that page from Midwest Labs to be rather good at explaining the subject.
I understand that what is being talked about here is at step 6 of the system and isn't really teaching the building blocks to get to that step.
Most people don't have a clue what CEC is, let alone what numbers to use to calculate it or even where to find them... If you don't know the vocabulary, how the hell do you research it, right? lol
Let's see what we can come up with, I want to get this all into a more user friendly format. People like you, Hermen are what make this fun... Thanks!
https://48ktyk3qffzqgswttcx2dv5i-wp...-Exchange-Cap-and-Percent-Base-Saturation.pdf
Wrap your head around that and come back with any questions you may have. Use the m3/aa numbers as I posted above along with the formulas in that link. I have found that page from Midwest Labs to be rather good at explaining the subject.
Arnold.
Active member
I wouldn't mind a soil math test 
Thanks for the link growingcrazy. It would have been helpful for me a few weeks ago.
I get your calculations of Hermen Eutics
But I don't get the calculations of Slownickel. For example post #339 at page 34.
If I run them with this formula of spectrum:
C.E.C. = (lb K ÷ 780) + (lb Mg ÷ 240) + (lb Ca ÷ 400) + [12 × (7 - BpH)]*
* If buffer pH is 7.0 or greater, use a 0 value as the remainder...Example: (7.0 - 7.1) = 0
(http://spectrumanalytic.com/support/library/ff/CEC_BpH_and_percent_sat.htm)
and the same calculations of the pdf above I find these numbers:
Jidoka Bas sample:
(here's the link to my excel file: https://drive.google.com/open?id=1PitO1PVr5zvTKZznZicSs552dih6I9Bj)
Slow says:
K Sat% Mg Sat% Ca Sat% Na Sat%
BAS 26% 10% 62% 2%
No idea what I did wrong. Anyone has an explanation for this?
The difference is quiet a lot.
Cheers!
Arnold.
Thanks for the link growingcrazy. It would have been helpful for me a few weeks ago.
I get your calculations of Hermen Eutics
But I don't get the calculations of Slownickel. For example post #339 at page 34.
If I run them with this formula of spectrum:
C.E.C. = (lb K ÷ 780) + (lb Mg ÷ 240) + (lb Ca ÷ 400) + [12 × (7 - BpH)]*
* If buffer pH is 7.0 or greater, use a 0 value as the remainder...Example: (7.0 - 7.1) = 0
(http://spectrumanalytic.com/support/library/ff/CEC_BpH_and_percent_sat.htm)
and the same calculations of the pdf above I find these numbers:
Jidoka Bas sample:
(here's the link to my excel file: https://drive.google.com/open?id=1PitO1PVr5zvTKZznZicSs552dih6I9Bj)
Slow says:
K Sat% Mg Sat% Ca Sat% Na Sat%
BAS 26% 10% 62% 2%
No idea what I did wrong. Anyone has an explanation for this?
The difference is quiet a lot.
Cheers!
Arnold.
G
Guest
What’s the biggest result for Ca from a Spectrum test anyone has seen? My number has got to be wrong.
16200 per the 8.2 test.
16200 per the 8.2 test.
Arnold.
Active member
Stewart,
it's a lot of ppm, but this probably just means you sent in a 'super soil' with a very high CEC.
The greater the CEC, the more ions are held. The more ions are held, the higher your ppm's.
One want to look at the ratio's of what is held by the OM/Clay. Not the ppms.
How do your base saturation look?
it's a lot of ppm, but this probably just means you sent in a 'super soil' with a very high CEC.
The greater the CEC, the more ions are held. The more ions are held, the higher your ppm's.
One want to look at the ratio's of what is held by the OM/Clay. Not the ppms.
How do your base saturation look?
G
Guest
Using what I think is the correct method to calculate
K 932=3%
Mg 1136=9%
Ca 16200=84%
Na 753=3%
IF I calculate correctly. Na is high but I have been leaching soil and have cut run off numbers for conductivity and salinity by almost half.
K 932=3%
Mg 1136=9%
Ca 16200=84%
Na 753=3%
IF I calculate correctly. Na is high but I have been leaching soil and have cut run off numbers for conductivity and salinity by almost half.
Edit, Reading more.
If I remember correctly, That calculation was wrong. I remember running across it before and scratching my head.
led05
Chasing The Present
It looks to me that on the results on page 34, Slow used the AA Mg number on the TS sample. My guess...to inflate the K%.
Really, I have no idea.
Really, I have no idea.
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