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calculating npk/nutrient profile

M

*mistress*

Member
Veteran
Last edited:
DiscoBiscuit

DiscoBiscuit

weed fiend
Veteran
0-0-20

Looks like a potassium boost/supplement with micros.

EDIT: I might could use that outdoors atm. What is it?
 
M

*mistress*

Member
Veteran
DiscoBiscuit said:
0-0-20

Looks like a potassium boost/supplement with micros.

EDIT: I might could use that outdoors atm. What is it?
Click to expand...


when mixed @ 15 ml (1 tablespoon), per gallon of water, what is the approximate nutrient profile, or ppm spreadsheet of each constituent?

for example:
xxx ppm of potassium
xxx ppm of calcium
xxx ppm of magnesium
...etc..
 
Last edited:
DiscoBiscuit

DiscoBiscuit

weed fiend
Veteran
ppm has two variants, .5 and .7

if your meter uses 1382 calibration solution, it's .5
it your meter uses 1500 calibration solution, it's .7
for that reason, communication with other peeps gets confusing, depending on which meter you have.

both are used to measure EC (electrical conductivity)

an ec meter gives you one reading with no variable
 
D

dongle69

*mistress* said:
thx in advance to all that help!

raw data:
container weight:
16 fluid oz. liquid/472 ml

per tablespoon/~15 ml/22 g:
potassium: 730 mg/20%

calcium: 115 mg/10%

iron: 15%

magnesium: 8%

*vitamin b6: 10%

question:
what is the approximate n-p-k/nutrient profile of the above liquid?
Click to expand...
Those numbers look like they are off of a food molasses bottle?
This stuff perhaps?
http://www.wholesomesweeteners.com/...de_Certified_Organic_Blackstrap_Molasses.html
If so, then those % numbers are daily food values, not related to npk for plant food..
0-0-3 would be the npk values of that bottle in terms of plant food.
3% potassium and .5% calcium
The container weight that you listed is not weight but volume.
I was able to figure weight from above link (704 grams).
Would need milligrams of all to determine full profile.
Iron and magnesium are missing milligrams on that list, so they cannot be determined.
So, at 1 TBS/gal:
n 0
p 0
k 147
mg undetermined
s undetermined
ca 30
 
Last edited:
B

Blue Dot

*mistress* said:
i.e.g., when mixed @ 15 ml (1 tablespoon), per gallon of water, what is the approximate nutrient profile, or ppm spreadsheet of each constituent?

for example:
xxx ppm of potassium
xxx ppm of calcium
xxx ppm of magnesium
...etc..

when the complete profile is here, will reveal what the liquid is... dont want bias to form prior to full profile disclosure...
Click to expand...

Why you gotta be stealing my thread?

http://www.icmag.com/ic/showthread.php?t=133972
 
B

Blue Dot

dongle69 said:
So, at 1 TBS/gal:
n 0
p 0
k 147
Click to expand...

I got 182.5 in my thread (also curious as to why you never replied. oh well).

So did you get 147 because only N is a 1:1 when it comes to NPK and K is like, I forget, 1:.82?
 
B

Blue Dot

dongle69 said:
s undetermined
Click to expand...

Well since it clearly says UNSULPHURED on the lable it's prolly a good bet S=0 ppm lol

But seriously, I don't know if that means the raw proccesing has zero sulphur or maybe it has some and they just don't add more in the final outcome like they would a suplured version??

Anyway, I think it's safe to conclude this stuff is the CHEAPEST bang for the buck fert on the planet and actually has a pretty damn good ratio.

I'm using this more and more everyday. Still praying for no ants and suprisingly have not seen one ant. That just defies all logic but oh well.
 
D

dongle69

I didn't see your thread before this but it looks like you didn't figure in actual weight.
You need actual weight to use the nutrient profile accurately.
22,970 mg of k per bottle.
total weight of bottle contents is 704,000 mg.
22,970 is 3% of 704,000.
Plug into nutrient calc w/ weight (1.491525424 grams per ml)
and get 147 ppm k for 15 ml (1 TBS) molasses.
 
B

Blue Dot

dongle69 said:
I didn't see your thread before this but it looks like you didn't figure in actual weight.
You need actual weight to use the nutrient profile accurately.
22,970 mg of k per bottle.
total weight of bottle contents is 704,000 mg.
22,970 is 3% of 704,000.
Plug into nutrient calc w/ weight (1.491525424 grams per ml)
and get 147 ppm k for 15 ml (1 TBS) molasses.
Click to expand...

gotcha.
I was thinking it was elemental K vs salt K difference but I'm pretty sure that difference is built into the calc.
 
D

dongle69

Also, based on prices I have seen, that molasses costs 14 cents to use at 1 TBS/gal.
For comparison, some common nutrients and their standard doses:
FloraNova Bloom is about 16 cents to use at 8 ml/gal.
Beastie Bloom is about 5 cents to use 1/4 tsp gal.
CalMag Plus is also about 5 cents to use at 5 ml/gal.
 
B

Blue Dot

I think the physical property of a syrupy liquid just cannot be measured properly on a TDS meter or especially a pH meter. it seems it would bind (coat) the pH membrane bulb or even the metal TDS probe and just throw off the reading.

I think the nute calc and these posted numbers are the only way to get a true measurement.
 
D

dongle69

You would also have to measure your own sample in deionized water to get nutrient profile ppm translated to .5 and .7 conversion.
I would suggest downloading the spreadsheet and check out the included text.
http://www.angelfire.com/cantina/fourtwenty/articles/download.htm
The ppm should be higher than shown in calculator, just like with other nutrients.
For instance, calculator shows FloraNova Bloom at 659 ppm (at 8 ml/gal) when it is approx 1300-1400 ppm at .7 conversion (it varies batch to batch).
Molasses could be more than 300 ppm total at .7 conversion.
Perhaps not show at all??
Confusing, yes.
 
B

Blue Dot

dongle69 said:
You would also have to measure your own sample in deionized water to get nutrient profile ppm translated to .5 and .7 conversion.
I would suggest downloading the spreadsheet and check out the included text.
http://www.angelfire.com/cantina/fourtwenty/articles/download.htm
The ppm should be higher than shown in calculator, just like with other nutrients.
For instance, calculator shows FloraNova Bloom at 659 ppm (at 8 ml/gal) when it is approx 1300-1400 ppm at .7 conversion (it varies batch to batch).
Molasses could be more than 300 ppm total at .7 conversion.
Perhaps not show at all??
Confusing, yes.
Click to expand...

The calc will always show lower ppm because the calc displays elemental ppm.

meters don't make the conversion from salt to elemental.

The conversion they make is for one type of salt (NaCl [.7]) compared to another.

I thought the calc had the . 5 and .7 built in but I remember once trying to use it and it was not functional.

I'm waiting for a nute calc that will also figure pH as well as ppm. :D
 
M

*mistress*

Member
Veteran
...the #'s...

...the #'s...

dongle69 said:
Those numbers look like they are off of a food molasses bottle?
This stuff perhaps?
http://www.wholesomesweeteners.com/...de_Certified_Organic_Blackstrap_Molasses.html
If so, then those % numbers are daily food values, not related to npk for plant food..
0-0-3 would be the npk values of that bottle in terms of plant food.
3% potassium and .5% calcium
The container weight that you listed is not weight but volume.
I was able to figure weight from above link (704 grams).
Would need milligrams of all to determine full profile.
Iron and calcium are missing milligrams on that list, so they cannot be determined.
So, at 1 TBS/gal:
n 0
p 0
k 147
mg undetermined
s undetermined
ca 30
Click to expand...
yes, that is the raw material. but the numbers may be a little different below...
Blue Dot said:
Why you gotta be stealing my thread?

https://www.icmag.com/ic/showthread.php?t=133972
Click to expand...
:D

here are the dv for a 2k cal diet:
http://www.netrition.com/rdi_page.html
for converting nutrition facts/daily values

also, the wholesome sweeteners' tablespoon is 22 g, not the 15-16 g of some conversion charts for tablespoon-to-ml.

apparent standards
1 mg =1 ppm, when water is solvent

1 g = 1 cc = 1 ml

%dv (daily values) are based on 2k reference values for nutritional labeling (non-plant food product)

not all tablespoons measured the same... check mg/g for specific tbsp weight.

the #'s...:

wholesome sweeteners organic molasses
per 1 tablespoon/22 g, in 1 gallon of water/3.785 liters:
potassium: 730 mg/~20% of 3500 mg dv for k/730/3.785=192.86 ppm
calcium: 115 mg/~10% of 1000 mg dv for ca/115/3.785=30.38 ppm
magnesium: 8% of 400 mg dv for mg/.08*400=32/3.785=8.4 ppm
iron: 15% of 18 mg dv for fe/.15*18=2.7/3.785=0.71 ppm
vitamin b6: 10% of 2.0 mg dv for vit b6/2*.1=.2/3.785=.05 ppm
sugars: 10g

total carbohydrates: 14g

hope this helps.
 
Last edited:
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