If you applied 6 bags each weighing 20 pounds of 7-1-1 fertilizer to a quarter-acre area, what was your lbs N/M rate? Answer to the nearest 0.01 lb N.
In our 7-1-1 fertilizer we must know that
the first number in the ratio 7-1-1 represents percent N in the bag.
=> 7/100 = 0.07 ( 7% ) N in 20 lb bag.
In in 1 bag of 20 lb, lbs N = 0.07 x 20 lbs = 1.4 lbN
no. of bags used = 6
therefore in 6 bags lbs N = 6 x 1.4 = 8.4 lbs N
area to which it is applied = quarter-acre area
and A quarter acre is 10890 square feet
so for 10890 sq ft of area requires = 8.4lbs N
=> for 1000 sq ft = we must have (8.4/10890)x 1000 lbs N
= 0.77 lbs N/M rate
If you applied 6 bags each weighing 20 pounds of 7-1-1 fertilizer to a quarter-acre area,...
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