fert. calculation tool

Discussion in 'Pesticide & Herbicide Application' started by jake65, Dec 27, 2005.

1. jake65LawnSite Memberfrom Rochester, NYMessages: 75

Is there such a tool that will calculate or convert nitrogen, phos, and potas. and the amounts needed per sq. ft given the sq ft desired??

Thanks

Jake

5. YardProLawnSite Gold Memberfrom coastal NCMessages: 3,567

yea, it's called a brain..... lol sorry couldn't resist...

6. Landscape25LawnSite Memberfrom FloridaMessages: 199

This is for 1 lb. N for 1,000/ sq. ft. in case you don't have access to a computer.

Eg. 17-2-11 50lb. bag

Divide 100 by 17, because 17 is based on a hundred pounds. This gives you 5.88 lb. This will be the total amount of fert. you need per 1,000 sq. ft.

The whole bag covers 8,500 sq. ft. for N because it is a 50 lb. bag.
8,500 divided by 1,000 = 8.5
8.5 x 5.882 lb. = 50 lb.

If you want .5 lb N per 1,000 sq. ft. use half the amount.

Yeah, the Google method is definitely easier, but not always practical.

7. TforTexasLawnSite Senior Memberfrom Albuquerque NMMessages: 260

Just multiply the weight of the bag by the percetage of N, P or K posted on the analysis. A 50 pound bag of 20-10-10 has 10 punds of Nitrogen and thus will do 10,000 Sq ft @ 1lb of N per 1,000