Drip volume calculation per hour

Discussion in 'Growing Marijuana Indoors' started by Prankster, Oct 16, 2023.

  1. #1 Prankster, Oct 16, 2023
    Last edited: Oct 16, 2023
    How do I figure this out?

    I tried it by using the CIMIS version of the FAO Penman-Monteith equation.

    https://www.researchgate.net/public..._of_Container_Crops_for_Irrigation_Scheduling

    I came up with these numbers. This is at peak flowering conditions and I would use a Kc value of 1,1.

    For the light radiation I used 1,35 Mj/m2*hour. Dont know if this is correct. Rh=55%, VPD = 1,51, atmos pressure =102 kpa, windspeed (u2) = 0,3 m/s with wind function f(u2), s = slope saturation vapor curve, y=psychrometer constant, W = s/(s+y)

    et0.png

    Et0 (hour) = (W*Rn)+((1-W)*VPD*f(u2)

    Et = Kc*Et0

    Et With Kc = 1,1 --> 1,128 liters per square meter per hour.

    Isn't this a bit much water? This number is for 1 square meter. Do i have to calculate it for the surface of the pot?
    This surface is about 0,045 m2 (square meter). So this area would get 0,045 * 1,128 L = 0,051 L/hour.
    Isn't this a little small for a full flowering plant. It drinks like crazy
     
  2. Wow, too much for my brain. PTP...paralysis through analysis.
     
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  3. It's only as hard as you make it. How many ppm of E.coli in a fart? :confused_2:
     
  4. lmfao.....Depends on the fart. A juicy one? A dry one? A Shart?
    joke aside, thats why I use SIPs. Takes all the calculation and fuss out of that equation. Let the plant drink what it wants.
     
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  5. ditto sips here too & not just for weed. I do let the saucers dry up before refilling them though. For the record the standard popcorn fart is the norm.
     
  6. ((((WOW)))) please rename the post. OLD HIPPIES do not enter may kill your buzz. Thanks a lot for that .
    Lol so much math . So many formulas . Where is the fun anymore in growing ?
    IDK what the fuck is going on anymore.
     
  7. Everytime. Fucking useless this forum. whole fucking world eats because of these equations. And here they talk to plants. It whispers when its hungry

    You improve yields with drippers. Its roots never have to spent energy searching for water or oxygen when the soil to dry or oversaturated. So that it can spent its energy in big bud production.
     
  8. Old hippies something you read about?
     

  9. For me this is fun. I like it technical. I like math
     
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  10. Get your hands on an IV tubing & you can dial it in EXACTLY! You like math? Drop & give me long division. :biggrin:
     
  11. You ain't gonna have a topic very long you keep talking shit and disrespecting other forum members. They do have rules here, might wanna take a peak.

    Less talk, let's see what you can do. Where's the bud porn?

    Sent from my LM-X420 using Grasscity Forum mobile app
     
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  12. Wow. weird. asking question in an indoor grow forum. If you have no experience in drippers, than why are you replying. Just stay away. José.
     
  13. Action = reaction

    Im just asking a question. Not trying to prove anything. But they immediately started harassing me
     
  14. NO calling the people you are seeking help from Dicks is the problem. Good luck getting help now.
     
  15. Where's the pictures? I'm curious how good of a grower you are, a lotta talk, gotta back that shit up.

    Sent from my LM-X420 using Grasscity Forum mobile app
     
  16. You are not everybody or the people narcissist
     
  17. what pictures. stay on topic.
     
  18. Yeah exactly what I thought.

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  19. Impossible with 3 braincells.
     
  20. That all you got? Immature childish responses?

    Sent from my LM-X420 using Grasscity Forum mobile app
     

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