Calculating how much fertilizer to add to an area STEP 1 Des

Calculating how much fertilizer to add to an area: STEP 1: Desired rate in lbs nitrogen (N)/1,000 sq.ft/% nutrient (as a decimal) = fertilizer needed per 1,000 sq.ft. STEP 2: Total fertilizer needed/1,000 sq.ft. x area in sq.ft = lbs fertilizer needed for the area For example, to fertilize a lawn area 50 times 100 ft at a rate of 1 lb. of nitrogen (N) per 1,000 sq.ft. with a 18-3-18 fertilizer, the following calculation is required: 1/0.18 = 5.5 lbs fertilizer product/1,000 sq.ft 5.5/1000 times 5,000 (area) = 27.5 lbs total fertilizer needed A bag of lawn fertilizer typically weights 50lbs. how many bags of organic10-2-8 fertilizer Answer in lbs How much fertilizer product is needed to apply 1 lbs N/1,000 sq.ft. to a soccer field area 80,000 sq.ft. with a 22-3-11 synthetic fertilizer Answer in lbs

Solution

1.

step 1 : 1/0.10 =10 lbs fertilizer product /1000 sq.ft

10/1000 x 80,000(area) = 800 lbs total fertilizer needed

step 2 : A bag of a soccer field fertilizer typically weights 800+2+8 = 810 lbs

2.

step 1 : 1/0.22 = 4.55 lbs fertilizer product / 1000 sq.ft

4.55 /1000 x 80,000 = 364 lbs total fertilizer needed

step 2: A bag of soccer field fertilizer typically weights 364+3+11= 380 lbs