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Old August 15, 2010   #16
korney19
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And for some reason, on a smaller pop bottle I poured the stuff into, I wrote "1.5t" but don't remember where I got the # from!
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Old August 16, 2010   #17
dice
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I may have posted this before, but I find the area and volume
pages linked to the top-level index at the URL below most
convenient for this kind of thing. That was how I got from 1.5
pints to 24 US fluid ounces, and from .24 fluid ounces to 1/2
tablespoon (actually .48 tablespoon, but I rounded up to the
nearest thing to easily estimate with an ordinary measuring
spoon).

You would plug in your actual pints per acre to get how many
fluid ounces of concentrate you need per acre, divide by 100
to get from fluid ounces of concentrate per 100 gallons to fluid
ounces of concentrate per gallon, and then convert fluid ounces
to tablespoons to get tablespoons per gallon. (Both fluid ounces
and tablespoons are volume measurements.)

The area conversion is easier, just divide square feet per acre
by 100 (for 100 gallons to cover an acre down to whatever
a gallon should cover).

http://www.sciencemadesimple.com/conversions.html

To convert pounds of concentrate per acre instead of pints,
still mixing into the same 100 gallons of water for application,
you need a scale, because the final measurement is going
to be ounces (weight, not fluid ounces) or grams per gallon.
(To convert to dry tablespoons, you would have to know either
how much volume a pound of the stuff takes up or how much
a dry tablespoon of the stuff weighs.)

If it is 1 lb. per acre, mixed into 100 gallons of water, a pound
is 16 ounces. So per gallon, it would be 16/100 = .16 ounces,
and it would still cover 43560/100 square feet = 435.6 sq. ft.

.16 ounces is 4.54 grams if your scale reads in grams, so that
would be about 4 and a half grams per gallon, still covering
the same area of a little more than 400 sq. ft.
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Last edited by dice; August 16, 2010 at 08:08 AM. Reason: long line
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Old August 16, 2010   #18
dice
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So, I am sitting here doing something else, and it occurs to
me that we can go directly from pints to tablespoons and
skip a step in the description above (32 tablespoons per pint,
by the way). This can be reduced to a formula:

((pints per acre) x (tablespoons per pint)) / (gallons per acre) =
(tablespoons of liquid concentrate per gallon)

((actual square feet) / (square feet per acre)) x (gallons per acre)
= (how many gallons of mixed solution to use)

To use dry concentrate with a "pounds per acre" instruction
(or kilos per acre), first you weigh a tablespoon of the dry
concentrate.

(((pounds per acre) x (ounces per pound)) /
(ounces per tablespoon)) / (gallons per acre) =
(tablespoons of dry concentrate per gallon of water)

(To use kilos and grams, get the weight in grams of a
tablespoon of the dry concentrate, then subsitute kilos
for pounds and grams for ounces in the formula above.)

Once you have tablespoons of dry concentrate per gallon,
use the same area formula to decide how many gallons
to use:

((actual square feet) / (square feet per acre)) x (gallons per acre)
= (how many gallons of mixed solution to use)
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Old July 28, 2015   #19
korney19
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Quote:
Originally Posted by dice View Post
So, I am sitting here doing something else, and it occurs to
me that we can go directly from pints to tablespoons and
skip a step in the description above (32 tablespoons per pint,
by the way). This can be reduced to a formula:

((pints per acre) x (tablespoons per pint)) / (gallons per acre) =
(tablespoons of liquid concentrate per gallon)

((actual square feet) / (square feet per acre)) x (gallons per acre)
= (how many gallons of mixed solution to use)

To use dry concentrate with a "pounds per acre" instruction
(or kilos per acre), first you weigh a tablespoon of the dry
concentrate.

(((pounds per acre) x (ounces per pound)) /
(ounces per tablespoon)) / (gallons per acre) =
(tablespoons of dry concentrate per gallon of water)

(To use kilos and grams, get the weight in grams of a
tablespoon of the dry concentrate, then subsitute kilos
for pounds and grams for ounces in the formula above.)

Once you have tablespoons of dry concentrate per gallon,
use the same area formula to decide how many gallons
to use:

((actual square feet) / (square feet per acre)) x (gallons per acre)
= (how many gallons of mixed solution to use)
Thanks! (I think)

Pretty sure most of my fungicides for Late Blight and other things were 1.5 pints/A. I have one in a squeezable pancake syrup bottle and see "1.5t" written on it...
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Old July 5, 2017   #20
korney19
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Thanks again guys! I knew we discussed pts/a to TBS/gal SOMEWHERE HERE before!


EDIT: I also found this page showing gallons & square feet:
https://extension.unh.edu/resources/...86_Rep2341.pdf

Last edited by korney19; July 6, 2017 at 12:27 AM.
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