DAP

[DRC]

Started drilling maize yesterday . Was very surprised to see the colour of the DAP. Neither myself or contractor had ever seen anything like it . Call reputable supplier and after calling Glasson, was told the Russians add molasses to it for the Brazilian market .(why)

Anyone else seen it black before .?

 

[Andrew1983]

The blend we had for turnip fertiliser last year had a fair percentage of black prills in it. I hadn’t seen that before either.

 

[Bald Rick]

Started drilling maize yesterday . Was very surprised to see the colour of the DAP. Neither myself or contractor had ever seen anything like it . Call reputable supplier and after calling Glasson, was told the Russians add molasses to it for the Brazilian market .(why)

Anyone else seen it black before .?

Apparently it’s soot to stabilise the product according to this patent

CN101671209A - Special coloring agent of diammonium phosphate compound fertilizer and preparation method thereof - Google Patents

The invention discloses a special coloring agent of a diammonium phosphate compound fertilizer, comprising the following constituents: 40-50 parts of humic acid salt, 0.1-3 parts of carbon soot, 2-4 parts of acid black, 1-2 parts of acid brilliant scarlet, 0.2-1 part of sodium hexametaphosphate...

patents.google.com

 

[deleted user 837354]

Different!

 

[Kiwi Pete]

Started drilling maize yesterday . Was very surprised to see the colour of the DAP. Neither myself or contractor had ever seen anything like it . Call reputable supplier and after calling Glasson, was told the Russians add molasses to it for the Brazilian market .(why)

Anyone else seen it black before .?

Down here, we have two main fert co-ops.. the Ballance DAP is almost as dark as that, chocolate colour; the Ravensdown DAP is about the colour of beeswax.
Ballance SOA is about as dark as your DAP looks!
But the Ravendown SOA is white.

I have no idea why!

.