Bananas.org - View Single Post - Potassium sulfate 0-0-50 question?

Stonefox · 03-25-2018, 01:24 AM

So could someone check my maths, these fraction / ratio calculations can be tricky for me.

I can get from the local farmers co op:
N: urea (46-0-0)
P: mono-ammonium phosphates (MAP) (10-50-0)
K: Sulfate of potash (0-0-50-18S)

If I am aiming at Richards suggested ratio of 4-1-6 and mix:

8.2 kg urea = 3.8kg nitrogen

2 kg MAP = 0.2kg nitrogen and 1 kg phosphate

12 kg potash = 6kg potassium

total weight of mix = 20.2 kg

In 20.2 kg I have 4kg N: 5kg P: 6kg K
Which is a (19.8)-(4.9)-(30) ratio , which is very close to 20-5-30, which is in the desired 4-1-6 ratio.

Have I done this calculation correctly??

03-25-2018, 01:24 AM	#25 (permalink)
Stonefox Find me on the map! Join Date: Jan 2018 Posts: 36 BananaBucks : 6,105 Feedback: 0 / 0% Said "Thanks" 40 Times Was Thanked 16 Times in 11 Posts Said "Welcome to Bananas" 0 Times	Re: Potassium sulfate 0-0-50 question? So could someone check my maths, these fraction / ratio calculations can be tricky for me. I can get from the local farmers co op: N: urea (46-0-0) P: mono-ammonium phosphates (MAP) (10-50-0) K: Sulfate of potash (0-0-50-18S) If I am aiming at Richards suggested ratio of 4-1-6 and mix: 8.2 kg urea = 3.8kg nitrogen 2 kg MAP = 0.2kg nitrogen and 1 kg phosphate 12 kg potash = 6kg potassium total weight of mix = 20.2 kg In 20.2 kg I have 4kg N: 5kg P: 6kg K Which is a (19.8)-(4.9)-(30) ratio , which is very close to 20-5-30, which is in the desired 4-1-6 ratio. Have I done this calculation correctly??