Calculating N-P-K values on Fertilizer Cakes

[Jon_gte436e]

I have a quick question? When trying to figure the NPK values when making fertilizer cakes do you use zero values for parts that are used that have no NPK value? Like adding lime or flour to the mix. Do you exclude them from the calculation? It seems to me you would just use zero values as they are diluting the mixture, even if they are inert material. I found a post on calculating this stuff a while back but for whatever reason I cannot find that post today??

Example:

This:

Parts N P K
Cottonseed Meal 4 6 1 1
Flour 1 0 0 0
Bone Meal 4 2 14 0
Fish Emulsion 3 5 1 1
12 3.9 5.25 0.58

OR:

Parts N P K
Cottonseed Meal 4 6 1 1
Bone Meal 4 2 14 0
Fish Emulsion 3 5 1 1
11 4.27 5.73 0.64

 

[Jon_gte436e]

Sorry the spacing on the number got all moved aroun...

 

[Anthony]

You need to check the composted values.

Oil seed meal NPK is when it is fermented.
Not sure what it would be composted.

Also try and keep your P value low, say 2 or so.

Are you using this for ground growing or refinement [ grow box ]
If for refinement [ grow box ] around 6 N and low P and K will
do just fine. say 2 or 1.
Or just use fish fertiliser if you want to stay organic.
Good Day
Anthony