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5-5-5 square foot fert math
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farmer4321
Posted 4/10/2019 18:22 (#7431520 - in reply to #7431490)
Subject: RE: Assuming that when you say 50 units of N, P, K, you mean...


Assuming that when you say 50 units of N, P, K, you mean the equivalent to 50 lbs of N or P or K per acre.
Then, to get 50 lbs of N from a 5-5-5 product, you divide 50/.05 to get 1000 lbs of product per acre.
Give an acre is 43,560 ft sq'd then 1000/43,560 or 0.02295 lbs per sq ft.
If you need 0.0229 lbs of material that weighs 0.4 lbs per cup then .0029 divided by .4 or .0574 cups.
Given that 1 cup is equivalent to 48 teaspoons then .0574 cups is 2.75 teaspoons. (.0574 x 48)
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