# how many lbs of nitrogen?

#### bobbygedd

##### LawnSite Fanatic
i think i know the answer, lets see if anyone else does. if a 50 lb bag of fertilizer , rated to treat 12,500 sq ft of turf, has the numbers 20-10-10 on it, how many lbs of nitrogen per k is being applied?

20%N/2=10lbs
Agr.101

OP
B

#### bobbygedd

##### LawnSite Fanatic
how many lbs per k?

#### lars

##### LawnSite Member
50/12.5 = 4 lbs fert / 1000

4 x .2 = .8 lbs N / 1000

#### trimmer

##### LawnSite Senior Member
50x.20=10lbs of nitrogen in bag

10/12.5=.8lbs per/k

#### Envi-Lawn

##### LawnSite Member
if my math is right- its .8lbsN/k

#### Envi-Lawn

##### LawnSite Member
It all depends on the person behind the spreader.
Just kidding!

#### GreenMonster

##### LawnSite Silver Member
50*20%=10lbs
10/12.5=.8lbsN per 1k

Interesting how lars got there. I didn't think of it that way.

I believe both are right though?

very interesting

OP
B

#### bobbygedd

##### LawnSite Fanatic
very good, you guys surprised me