# Riddle me this.....

Discussion in 'Pesticide & Herbicide Application' started by Usz, Mar 7, 2008.

1. ### UszLawnSite Memberfrom Largo, FLPosts: 7

The cost of a 20 pound bag of a 16-4-8 fertilizer is \$9.75. How much will it cost to apply 6 pounds of potash?

Can someone tell me how to figure this out?

2. ### silverscapesLawnSite Memberfrom dePosts: 88

about 40 bucks why don't you buy straight potash go to any ag store and get it

3. ### UszLawnSite Memberfrom Largo, FLPosts: 7

Thanks but I need the actual answer I am not a math wizard

4. ### LawnTamerLawnSite Gold Memberfrom Salt Lake City, UtahPosts: 3,986

\$36.56 plus tax. That is an expensive way to put down 6 lbs of potash.

5. ### UszLawnSite Memberfrom Largo, FLPosts: 7

thanks, how did you come to that answer

6. ### americanlawnLawnSite Fanaticfrom midwestPosts: 5,860

You are leaving out one thing....the rate per given area.

7. ### UszLawnSite Memberfrom Largo, FLPosts: 7

Figured it out, thanks

20lbs * .08 = 1.6 lbs

6 lbs/1.6= 3.75 bags needs

3.75bags * \$9.75 per bag = \$36.56

8. ### bug-guyLawnSite Senior Memberfrom spring hill/brooksvillePosts: 977

16-4-8 really means 16 lbs ,4 lbs, 8 lbs per 100lbs of product
hence a 50 lb bag does 8000 sq ft @ 1 lb of n per 1000 sq ft because there's 8 lbs ,2 lbs, 4 lbs of npk per 50# bag

this use to bother me when i would push a spreader with a 50 # bag and only getting about 16 lbs of actual fert counting minors

9. ### greendoctorLawnSite Fanaticfrom Honolulu, HawaiiPosts: 9,127

This is just one of the reasons why I do not do granulars. For me, 6 lbs of K is equal to 13.3 lb. potassium nitrate. A 50 lb pack of potassium nitrate is ~\$23, or about \$1 per lb of K. My entire fertilizer inventory is not pallets stacked in my garage. It is in 5 gallon plastic pails with covers. I can cover an acre with no more than 80 lb of material.