Liquid fertilizer N calculation

[Laggard]

If I put 50l/ha of 15%N liquid fertilizer on, what is the calculation for total N/ha please? What’s the answer as well, I’ve got brain freeze.

 

[Breckland Boy]

0.15 × 50= 7.5kg N

 

[Farmer Fin]

Depends who you bought your fert from. Is it 15% by wait or volume.

The manufacturer normally say and provide a table. You need to know this or you could be wrong. For example an omex 15 and a Yara 15 are different.

 

[Beefsmith]

0.15 × 50= 7.5kg N

Not necessarily because the SG of liquid fert generally is 1.2 ish so it could be about 10kg N

I’ve applied 290l/ha today of Omex 22n 10.5so3 and that’s given me about 80kg N and 38kg so3

 

[Brisel]

50 x 15% = 7.5 kg N if it's W/V

For W/W fertiliser you need to factor in the specific gravity. If my maths is right you've applied (50 x 15%) x 1.2 SG = 9 kg/ha N. Or is it the other way around & 6.25 kg N???