SDI?? Sub Surface Irrigation! - Page 2 - The Combine Forum
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post #11 of 30 (permalink) Old 08-21-2017, 11:23 PM
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Here are a couple of pictures, of the drip tape on the pivot and the filter

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post #12 of 30 (permalink) Old 08-22-2017, 12:25 AM
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Batman,

Great photos-thanks for posting!

So they're just bolting the tape into the pivots and running it above ground?

Laid out after seeding?
Then roll it up before harvest? (See that it's on the ground for the wheat/barley) what about for the corn?


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post #13 of 30 (permalink) Old 08-22-2017, 02:08 AM
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Originally Posted by jesseb99 View Post
You mentioned that it is 1 and a half times the cost of a pivot. I am completely unfamiliar with irrigation, and I mean completely, so what would that make the cost? What kind of return can you see on one of these systems?
I could be way out of date here, but last we were in the market for a new pivot installation, the complete solution from pump to mainline to pivot was about $100k CAD. I'm sure it's more now.
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post #14 of 30 (permalink) Old 08-22-2017, 08:59 AM
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One of the drawbacks is the water won't rise to the surface. You have to have sufficient rainfall to germinate the seeds so the roots can grow down to the water or run the pivot to germinate the crop.
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post #15 of 30 (permalink) Old 08-22-2017, 09:50 AM
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Here are a couple of pictures, of the drip tape on the pivot and the filter
In your first photo is the tape actually that long or is that just the marks it left behind.
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post #16 of 30 (permalink) Old 08-22-2017, 09:15 PM
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Thumbs up the tape really is that long

On drip tape we don't talk gallon per minute we talk gallons per hour.
this drip tape has one gallon per hour emitters every 6 inches. so to take 700 gallons per minute, so you have 7000 emitters dragging behind the pivot. So the farther you get out the more emitter you have to have to get all the water. the last tower of the pivot, the drip tape is over 80ft long and it is on the ground. what you see coming off the pivot are feeder hoses, that range from 15ft to 25ft, they the drip tape is attached.
For cutting hay and barley around here, they guys cut into the center of the pivot and then move the pivot into the center. then they send a guy down the pivot to pull all the drip tape under the pivot. When harvest is over they start up the pivot and the tape will straighten out.
For winter, on farmer just leaves it alone and the wind will blow it around, The Barley field in the picture has been planted to a cover crop, those farmers are going to graze it off. so they are planning on taking the tape and zip tying 10- 20 strands in several different place so it will look like a pony tail, then they are going to hang the tape on the pivot to keep it away from the cows, it will be interesting to see.
one thing we have learned is that we can sprout Seeds with SDI, you just have to have a closer spacing, 30-36in apart, at that spacing we can move enough water to the surface to start your corn, wheat, barley, beans and sugar beets. but Alfalfa will still need a surface application. I do need to clarify, I have not seen any SDI in sandy soils, so I do not know how it would work. but as usual this all depends on you what kind of soil you have for SDI.

sorry for the long response. I am liking Drip the more I am around it.
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post #17 of 30 (permalink) Old 08-22-2017, 09:29 PM
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A couple of more pictures,
yes we hook the feeder lines right to the trusses on the pivot, we use a ubolt.
and just another picture of the drip tape in corn, you can see the water drip off the tape
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post #18 of 30 (permalink) Old 08-22-2017, 09:32 PM
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The biggest problem I see with the drip tape on the pivot is every time you need to reverse directions it could be a real mess. How do they handle this at seeding and harvest time when you need to move the pivot, often a couple of times?
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post #19 of 30 (permalink) Old 08-23-2017, 09:54 PM
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backing up the pivot is not bad, the pivot just runs over the tape. they do have problems with the tape right behind the wheels, (which I do not understand why the put it there) it will pull the tape off. But like I said it will just run over the tape. we are trying to figure out to put the tape on a pivot corner system. but it will take some time to figure out how we can run over full of water. I am headed for training in California in a couple of weeks so I should know more when I get back
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post #20 of 30 (permalink) Old 08-23-2017, 10:35 PM
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Look forward to hearing your learnings!

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