watering amounts
- To: "'pumpkins@mallorn.com'" <pumpkins@mallorn.com>
- Subject: watering amounts
- From: "* G* L* <G*@PSS.Boeing.com>
- Date: Tue, 14 Jul 1998 10:09:27 -0700
for the newer growers here is some information that might help you in
your watering.
1 gallon = 231 cubic inches
to water 1 square foot of your garden with 1 inch of water it takes
0.623 gallons or just more that 1/2 a gallon. so if you want to know how
much to water mulitply the square footage of you garden by 0.623. that
is how much water you need to water your garden 1 in of water. If you
think your garden needs 1 1/2 in. of water per week then multiply by
1.5. then if you water everyday dividle that number by 7.
here is an example for 20 ft by 50 ft garden
20 x 50 = 1000 sq ft
1000 x 0.623 = 623 gallons
623 x 1.5 = 934.5 gallons for the patch per week
934.5 divided by 7 = 133.5 gallons per day
if you don't know how much water comes out of your hose, here is watch
you can do -( if you don't want to by a flow meter) get a five gallon
bucket - turn on you hose the same as when you water your plant - with
the same nozzle, sprayer, just straight out ot the hose or whatever.
time how long it takes you to fill the 5 gallon bucket. then dividle
your number of gallons per day by 5.
then take that number and multiply it with the time it took to fill the
bucket - this is the amount of time you should water.
for the example above :
say it took 2 minutes to fill the bucket.
take 133.5 dividle by 5 = 26.7
26.7 x 2 = 53.4 minutes.
Thus you should water the whole 20 x 50 patch as evenly as you can for
53 minutes everyday.
if you have sprinklers you can stick a few rain gages in the patch and
see how long it takes to fill them 1/4 inch. to get 1 1/2 inches on
your garden per week then you multiply that time by 6. then dividle by
7 to get a daily time.
for example if it take 30 minutes for your sprinklers to fill your gages
with 1/4 inch of water. 30 x 6 = 180 180 dividle by 7 = 25.7 so
you should water your patch about 25 1/2 minutes everyday. ( a tuna can
makes a good watering gage )
Gordon Tanner
Maple Valley, WA
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