a wicked pulse

[delta9nxs]

Hey D9, whats the backstop fencing called (opening size?), and if you got at a big-box store, mind saying which? Thanks.

stagehand

it is the cheapest grade 2"x4" mesh from lowes. i bought the 36" high 50' roll.

i think i saw 48" there too.

 

[Ichabod Crane]

This is what he is using, but it is vinyl coated.

And his is 36 inches not 24 like this is. But this is what your roll will look like but silver in color.

 

[Bud buster]

hey bud buster! welcome to icmag!

Thanks I've been lurking forever about time I jumped in.

 

[zeke99]

not intelligence so much as a very sophisticated evolutionary survival strategy.

this is an actual molecular level switch that functions in real time like a light switch on the wall. controlling morphological adaptations to changing light conditions through gene expression.

when viewed in this context defoliating no longer can be described as "stunting".

instead it should be described as better resource management.

if, under any given set of conditions, the plant has a limited amount of resources available for growth, for mass building, would you rather have the plant busy building stem or bud sites.

paying attention to the leaf area index all the time so you don't induce serious stalls.

I have not defoliated much before, but after reading these materials and your comments, I get it and have incorporated it into the current garden.

Would you care to offer a starting point for distance between two cannabis plants to avoid detecting each other? 36"? I'm will be switching to a rectangular bloom formation and might be able to pull off 36".

 

[zeke99]

These stem from the fact that a doughnut is really just a pie with a hole in the middle. Fewer, larger plants have to be physically worked to accomplish a circle of the right size, which, with a 1k bulb, is 30-32”. a circle with a radius of 15-16” from the center of the arc tube. You are stuck with this as this is what produces the maximum rate of photosynthesis at 1500 umols of photon bombardment.

The circumference of this 32” circle is 100.53”. so with 2 plants you have 50” of “face” each. 3 plants 33”, four plants get you 25”, and so on.

Also, at 16” from the center of the arc tube, the sweet spot of a 1k bulb is only 16” high. 8” arc tube plus about 4” either way up and down.

But, if you center the bulb in the middle of plant mass you can illuminate approx. 36” of vertical canopy adequately enough.

This is great, fantastic stuff, thank you for posting it. Just to be clear, would the ideal flat and vertical canopy with one 1k bulb centered in the middle of two plants be 36" from top to bottom and 32" from side to side?

 

[village green]

This is great, fantastic stuff, thank you for posting it. Just to be clear, the ideal canopy in a vertical grow with one 1k bulb centered in the middle of two plants is 36" from top to bottom and 32" from side to side?

Zeke99
The way I interpreted him was that the circle is 100" around. If you try to fill that circle with two plants they would have to be 50" wide by 36" high....which would be pretty awesome.

Is that what you were asking or did you mean the 32" to refer to the width of your donut and not the circumference?

 

[zeke99]

Zeke99
The way I interpreted him was that the circle is 100" around. If you try to fill that circle with two plants they would have to be 50" wide by 36" high....which would be pretty awesome.

Is that what you were asking or did you mean the 32" to refer to the width of your donut and not the circumference?

You'll see i reworded the post. I think I want to flatten out my vertical garden and go from five in two gallon buckets crowding a circle to two sets of two plants in 3.5 gallon buckets with a 1k bulb centered between each set.

 

[real ting]

I remember a few pages back people were discussing timers, and the cap art-dne had some bad reports for reliability. The sentinel drt-1 timer appears to have been discontinued. Are there any reliable off the shelf units other than this and the cap art-dne that can handle the timing for ppk pulse feeding?

 

[stagehand099]

I remember a few pages back people were discussing timers, and the cap art-dne had some bad reports for reliability. The sentinel drt-1 timer appears to have been discontinued. Are there any reliable off the shelf units other than this and the cap art-dne that can handle the timing for ppk pulse feeding?

Here you go....

http://www.greners.com/i/meters-tim...l/sentinel-drt-1-digital-recycling-timer.html

 

[oldone]

Just a reminder guys, to rate this thread. I just added the first 5 star rating

 

[village green]

Just a reminder guys, to rate this thread. I just added the first 5 star rating

Ya'll use metric though.

 

[oldone]

Ya'll use metric though.

I grew up with feet and inches and had to convert in high school. So I'm fine with both.

Stars are universal though. I stand by my 5/12.7 stars...

OO

 

[delta9nxs]

This is great, fantastic stuff, thank you for posting it. Just to be clear, would the ideal flat and vertical canopy with one 1k bulb centered in the middle of two plants be 36" from top to bottom and 32" from side to side?

sorry for the delay. i've been doing routine medical tests this week. done now.

there is no such thing as an ideal flat and vertical canopy with a 1k hps bulb because the bulb can only be at exactly 1500 umols on a few square inches. if the dead center is correct the edges must be incorrect and vice versa. the light at any given intensity describes a convex pattern. so you have a parabola meeting a flat plane.

but about a sq yard at 36" or a square meter at 39" can be covered adequately with the bulb centered in the mass.

the problem here is that if you get so focused on the 1500 umol number that you start cutting back on foliage you are going to cut back on overall yield too.

even though the bulb can't produce the top rate of photosynthesis on a plant part it still is capable of producing significant weight.

the sweet spot is only about 16" high but unlimited horizontally up to the 32" circle circumference of around 100 inches.

although the max rate occurs at 1500 umol you don't get photo inhibition until around 2000 umols. so if, and that's a big IF, you can work the closest part of the plant at 2000 umols without burning, you get more from the rest of the plant.

2000 umols is roughly equivalent to 10,000 fc.

 

[high life 45]

D9 your the man.

 

[real ting]

sorry for the delay. i've been doing routine medical tests this week. done now.

there is no such thing as an ideal flat and vertical canopy with a 1k hps bulb because the bulb can only be at exactly 1500 umols on a few square inches. if the dead center is correct the edges must be incorrect and vice versa. the light at any given intensity describes a convex pattern. so you have a parabola meeting a flat plane.

but about a sq yard at 36" or a square meter at 39" can be covered adequately with the bulb centered in the mass.

the problem here is that if you get so focused on the 1500 umol number that you start cutting back on foliage you are going to cut back on overall yield too.

even though the bulb can't produce the top rate of photosynthesis on a plant part it still is capable of producing significant weight.

the sweet spot is only about 16" high but unlimited horizontally up to the 32" circle circumference of around 100 inches.

although the max rate occurs at 1500 umol you don't get photo inhibition until around 2000 umols. so if, and that's a big IF, you can work the closest part of the plant at 2000 umols without burning, you get more from the rest of the plant.

2000 umols is roughly equivalent to 10,000 fc.

Stay gold, delta9.

Here you go....

http://www.greners.com/i/meters-tim...l/sentinel-drt-1-digital-recycling-timer.html

They're out of stock. what I'm told is that hydrofarm, sentinel's distributor, is transitioning to a new line or company called autopilot. they don't have a replacement digital recycling timer, but instead an analog one, which appears similar to the cap art-dne or the apollo 12. :/

I'm gonna dig around and see if I can't find something not made for hydroponics that will still fit the bill as far as a short/recycling digital timer. I will let y'all know if I come up with anything.

 

[zeke99]

sorry for the delay. i've been doing routine medical tests this week. done now.

there is no such thing as an ideal flat and vertical canopy with a 1k hps bulb because the bulb can only be at exactly 1500 umols on a few square inches. if the dead center is correct the edges must be incorrect and vice versa. the light at any given intensity describes a convex pattern. so you have a parabola meeting a flat plane.

but about a sq yard at 36" or a square meter at 39" can be covered adequately with the bulb centered in the mass.

the problem here is that if you get so focused on the 1500 umol number that you start cutting back on foliage you are going to cut back on overall yield too.

even though the bulb can't produce the top rate of photosynthesis on a plant part it still is capable of producing significant weight.

the sweet spot is only about 16" high but unlimited horizontally up to the 32" circle circumference of around 100 inches.

although the max rate occurs at 1500 umol you don't get photo inhibition until around 2000 umols. so if, and that's a big IF, you can work the closest part of the plant at 2000 umols without burning, you get more from the rest of the plant.

2000 umols is roughly equivalent to 10,000 fc.

Now that I think about it, you have written about what geography can be covered adequately with a 1k before, but I thank you for the detailed explanation.

 

[delta9nxs]

I have not defoliated much before, but after reading these materials and your comments, I get it and have incorporated it into the current garden.

Would you care to offer a starting point for distance between two cannabis plants to avoid detecting each other? 36"? I'm will be switching to a rectangular bloom formation and might be able to pull off 36".

sorry, i didn't see this earlier. i don't know this but it can't be very far as we are talking about reflected green light. again it does not have to be of photosynthetic intensity. we all have grown short, squat plants right next to each other so it has to be a close range thing.

the competitor recognition, shade avoidance, and stem elongation responses are
based on wavelength not amplitude.

 

[Guest 142956]

I built 6 new PPK's today, linked the buckets with tire valves and black rubber fuel line. I did make a change though I put the float valve in one of the buckets that I will grow a plant in, hooked up to a 18 gallon reservoir. And by the way a HPS will power a solar panel to run a DC boat sump pump for my pulse. I'm running a mix this time, Northern Lights x Big Bud, AKxSk#1 and Blue Widow.

 

[delta9nxs]

I built 6 new PPK's today, linked the buckets with tire valves and black rubber fuel line. I did make a change though I put the float valve in one of the buckets that I will grow a plant in, hooked up to a 18 gallon reservoir. And by the way a HPS will power a solar panel to run a DC boat sump pump for my pulse. I'm running a mix this time, Northern Lights x Big Bud, AKxSk#1 and Blue Widow.

hey bill! so what did you do the other 23 hours?

i am curious as to how you got a float valve and a tailpiece working together in a bucket without interfering with each other?

and this, "a HPS will power a solar panel", is priceless!

thank you!

 

[oldone]

Hey boys,

Check out the new sig....(shameless plug)

OO