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Topic: Calculating the NPK of liquids  (Read 3129 times)

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Offline amaru

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Calculating the NPK of liquids
« on: March 05, 2009, 08:43:05 PM »

Hello,

I make my own organic nutrient tea for my gardens.. I've always wondered how I might know the actual NPK
content of this tea.

Any suggestions?

 ::)
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Offline Arkcon

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Re: Calculating the NPK of liquids
« Reply #1 on: March 05, 2009, 09:41:49 PM »
You best bet is to try to look up the individual components that go into your homebrew plant food, in some sort of reference online, and try to guesstimate what the nitrogen-phosphorous-potassium amounts are.  Performing those particular analyses isn't trivial.
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Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline nj_bartel

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Re: Calculating the NPK of liquids
« Reply #2 on: March 05, 2009, 10:32:24 PM »
I don't know how you determine potassium/phosphorus, but kjeldahl method for nitrogen determination isn't something I'd want to attempt if I wasn't knowledgeable chemistry-wise.
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Offline AWK

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Re: Calculating the NPK of liquids
« Reply #3 on: March 06, 2009, 02:10:33 AM »
You should forget about home QUANTITATIVE analysis
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AWK
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