prakash7

Hello Everyone, I Need to increase NPK of my Natural fertilizer which is from crab shell,it contains Nitrogen is 2.6%, Phosphorus is 1.2% and Potassium is 0.5. But i Need to increase in the ratio of NPK N= 4 P=3 k= 0.5. Is there any natural ingredient of marine waste or any other natural waste to increase Nitrogen and Phosphorus?; please suggest me. Thank you.