Homemade Fertilizer Blend NPK Values?

Question

I am a organic gardener. I have a question on about DIY homemade fertilizer and need your expert opinion. I request the total NPK value for the below mixture, so that I know what amount of NPK I am adding to the plants. Thank you for your valuable time. This is the fertilizer blend: 1) Composted cow manure 2000gms or 4.4 lbs ( taken from 1 cuft bag which has NPK value of 0.5-0.5-0.5 ) 2) Worm castings 2000gm or 4.4lbs ( taken from 6lbs bag which has NPK value of 1.25-0-0 ) 3) Bone meal 1000gm or 2.2lbs ( taken from 3lbs bag which has NPK value of 6-8-0 ) 4) Neem cake powder 1000gm or 2.2lbs ( taken from 5lbs bag which has NPK value of 6-1-2 ) 5) Mustard cake powder 1000gm or 2.2lbs ( Donot know NPK value ) 6) Karanja seed cake powder (Pongamia Glabra) 1000gm or 2.2lbs ( taken from 5lbs bag of NPK value 3.5-0.5-0.5 ) Thanks

Answer 1

Since you have most of the values, just add the available Nitrogen, Phosphorus, and Potassium for each amendment. When you are using only half the bag, divide the elements in half.