Unique Rainshelters for Vegetable Production
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- Опубликовано: 2 дек 2020
- Unique rainshelters for vegetable production are shown.
Images in this video are part of a paper entitled "Plastic Covered Rainshelters for Vegetable Production in the Tropics" presented at the 33rd National Agricultural Plastics Congress of The American Society for Plasticulture in 2006.
Here is a link to the written article -
www.ctahr.hawaii.edu/hawaii/d... 
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What a wonderful look back at the evolution of ideas, thank you! There is so much learning through trial and error. Found myself taking notes from your video. In building my outdoor "Kratky" garden, I looked at rain exclusion using a greenhouse, and also containers that had dome shaped lids which were uncovered. The minimal rain infiltration using the dome lids, allow using non-circulating hydroponics without the typical rain shelter. My tomatoes grow so much better compared to those in the past that incurred soil born disease. My favorite design is the arched PVC, which can be sized according to need, and quickly built.
Thanks, Matt for sharing the experience with the dome-shaped lids. Yes, PVC is pretty convenient to work with. One issue is that the polyethylene film that contacts it may wear quicker than the other polyethylene, so sometimes we either painted the PVC with white latex paint or covered the PVC with a cloth sleeve in an attempt to prevent early deterioration and it was somewhat successful.
The structures look super cool. I wonder about the plant health benefits if the humidity is the same under a shelter or outside. Or is the splashing on the leaves more of an issue?
Good questions, Jeb. Rain falling on the foliage is usually the more serious disease issue and it also can leach nutrients from the root zone. Humidity can be an issue with a dense population of tall plants in a larger structure if there is no air movement. The 'greenhouse effect' causes increased temperatures due to sunlight and that can actually lower relative humidity.
dude I know dat dude... It;s U
I like the hope houses the best.
Your definition of enthusiasm is spot on. I would probably lean toward the roofing panel for the ability to install/remove relatively quickly. Lots of ideas there for sure. Big blue thumbs up for you, well worth watching.
Thank you. Another advantage of those rainshelters is that the stored parts don't take too much space.
Canadian here... we have rain and SNOW load issues with high tunnels here, so I have been thinking of trying to make something with 1in EMT. I really liked the examples and tips you presented, thanks.
With the snow loads you get, I would go with chain link fence rails. They make pipe benders for that size. When I lived up in VA, an old lady had a couple of greenhouses with the EMT and we got about 7 inches of snow which was preceded by an ice storm. Her roof collapsed.
I had 2" PVC and could not keep the roof from sagging because of the weight and although I finally managed to get it cleared off, the pvc pipe never regained it's original arch.
So, go with the heaviest pipe you possibly can! And then get some of that greenhouse SCRIM. There's also a dude, I wish I could remember his name but it's been years, he used to advertise in Homestead and Small Stock Journal back in the early to mid 2000's. He sold a plastic that was strong enough to use for pond liner and you could get it clear, silver or black. He used really thick REBAR, come to think of it, and his greenhouses never had an issue and his plastic lasted forever! He's up in Canada and the USA! www.northerngreenhouse.com/
i loved 2:30 the sweeping one.
You should seen it in person - it was really impressive!
@@growkratky5558 my hypothesis is dome can subdue Alaska
I like the EMT design and the PVC design most, the biggest upside for me would be the curvature as I live in the tropics (hong kong) and ponding would be a serious threat as we get so much rain. Especially during typhoons. I like PVC because its cheap, however I am not sure if it would survive the typhoons we get here.
Yes, winds above about 40 mph would probably be damaging to pvc structures.
For tomato splitting I think shade cloth would prevent the extra heat of sun and weather splitting the tomatoes. Cut out a lot of the sun and the plant won't over inflate the fruit I'd think.
Yes, shadecloth, especially aluminet, will help to moderate the negative effects of full and hot sun on some vegetables. In fact, anthurium flowers can not tolerate full sun, so they are typically grown in large shadehouses in Hawaii. Some splitting is due to wetting and drying of the soil and that can be controlled with a rainshelter.
@@growkratky5558 You need to breed beneficial insects like lady bugs and the little wasps for sale. Spraying for aphids when you have tomatoes is endless and not very helpful with neighbors that don't kill their aphid breeding grounds.
Hey Doc, I’m growing a few veggies(tomato, cucumber etc) Kratky style in 10lt containers in Nauru, Central Pacific- very hot and tropical, but struggling to get mature fruiting plants, any suggestions for Kratky in the tropics? The solution sometimes gets pretty warm. Most are not in full sun. Thanks, Adam
You might look into aluminet -covered shade structures and also paint the containers white or maybe place aluminum foil over them to reflect off some heat. Another possibility is to look into the practicality of burying the containers below ground level because the soil temperature is probably lower than the air temperature.
@@growkratky5558 thanks doc, I’ll give your suggestions a go.
This Japanese gardener use this 1/2" emt( ruclips.net/video/N_b2x3EgWPI/видео.html) shelter. Wondering if seen this before? USU extension has a video on RUclips by Ron Patterson where he used pvc and green steel stakes to make his hoop house.
Prof. Kratky, have you seen the youtube-channel called "zip-tie domes"? They have an innovative and simple technique to absorb energy to make robust PVC structures (that do not crack/snap at the four-way joints). Seems trivial at first glance, but is actually quite clever!
Thank you for directing me to this concept. It is quite impressive.
Oh yah I subbed and did da clickie