Does Compost Tea Work? Part 2 Fertilizer, Beneficial Bacteria and Big Vegetables
Two weeks ago I set up an experiment in the testing garden assumptions series to evaluate if both Actively Aerated Compost Tea and Compost Extractions lived up to their main claims. Primarily I looked at if they had potential as a fertilizer and then if the methods allowed you to increase the concentration of bacteria within it. The two claims I took a look at are not the only ones made by advocates of compost tea. Today I will investigate the other claims made about compost teas before making a decision at the end of this video if I am going to continue or abandon the practice in my garden. Does Compost Tea Work? Part 1 https://youtu.be/ivGdHo1sXF4 0:36 What about commercial Compost Teas? 1:14 Why culture bacteria using a compost tea method? 1:29 Research refuting the benefits of compost tea. 3:44 The Scientific Method and Occam’s Razor 4:34 I have been using AACT and have seen improvements. 5:02 Does compost tea to poor soil improves it 5:41 Is compost tea good to initially inoculate new soils? 6:17 What about the giant plants people show when they use compost tea 7:17 What about the benefits Foliar Application of Compost Tea 7:23 Can you fertilize your plants using foliar application of compost tea? 8:10 What about claims made about compost tea fighting disease? 9:00 In limited soil areas like containers is there value? 9:27 Summary and Findings Check us out on Facebook: https://www.facebook.com/AlbertaUrbanGarden/ Related Videos:Is Epsom Salt useful in Organic Gardening? https://youtu.be/DaCVoCnzav8 Testing Garden Assumptions Series Playlist: https://www.youtube.com/playlist?list=PL5mfR-r4BXH3UTGH_3UAG6cB8NnlO8M1U Supporting Material: [1] Is Rain Water Safe to Use in the Garden? https://youtu.be/zu6FZYbqCc0 [2] Kelp fertiliser and amendments in Organic Gardening https://youtu.be/enhH7iWesCE [3] Dr. Linda Chalker-Scott’s resource paper on foliar application http://puyallup.wsu.edu/wp-content/uploads/sites/403/2015/03/foliar-feeding.pdf [4] Dr. Linda Chalker-Scott’s resource paper on Compost Tea’s Pesticide use http://puyallup.wsu.edu/wp-content/uploads/sites/403/2015/03/compost-tea.pdf [5] Dr. Linda Chalker-Scott’s resource papers http://puyallup.wsu.edu/lcs/ [6] University of Kentucky http://organic.kysu.edu/CompostTea.pdf [7] Occam’s Razor https://en.wikipedia.org/wiki/Occam%27s_razor [8] Variability Associated with Suppression of Gray Mold (Botrytis cinerea) on Geranium by Foliar Applications of Nonaerated and Aerated Compost Teas http://apsjournals.apsnet.org/doi/abs/10.1094/PD-90-1201 [9] Failure of Foliar-Applied Biostimulants to Enhance Drought and Salt Tolerance in Urban Trees. http://eds.a.ebscohost.com/eds/detail/detail?sid=fc9a8c17-1488-40b2-9ad2-dca34f534594%40sessionmgr4003&vid=0&hid=4205&bdata=JnNpdGU9ZWRzLWxpdmUmc2NvcGU9c2l0ZQ%3d%3d&preview=false#AN=94717424&db=eih [10] Garden Professors Facebook Page https://www.facebook.com/groups/GardenProfessors/ [11] Garden Professors Blog http://gardenprofessors.com/ [12] Petri Dish Free to use on google search March 17th 2016 https://upload.wikimedia.org/wikipedia/commons/9/93/Agar_plate_with_colonies.jpg
Comments
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It may have something to do with worms in your garden. The leachate from the worms contains a lot of beneficial bacteria, rendering to benefit from tea minimal. It will be good for those won't doesn't bother to repopulate their soil with worms.
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Compost tea works for me
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I decided to start a garden recently, dug down a foot deep all over my garden to sift out all the rocks that a previous owner had put on/in the soil. back breaking work, but i am pretty sure i have bad soil. did not come accross a single worm or bug in any of the dirt at all. lol. did my best to fix it, will see how it goes.
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I agree with this video. I've tried comparisons with straight compost vs teas. If earth worms are present, my plants do exceptional without adding much of anything. Last year, my vegetable garden cost me $40. Mostly because I did not spend money on any snake oil treatments or gimmicks. The most erroneous results I have seen are coming from peoples perceptions as to what qualifies as 'finished' compost. Much of what I see being used really isn't finished. I raise red worms and compost. My finished compost is not far off of what the worm castings look/feel, or even smell like.
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what about compost tea for hydroponics/soilles media?
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is compost tea good for watermeloons?
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hello is compost tea good for watermelons
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You are grossly under educated regarding the nutrient cycle, as is Linda Chalker Scott. You do have some valid points but have no way to validate them. Please see my comment on your first video,
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Videos like this help me get the most out of my limited gardening time, I'm glad I watched it because I was going to make a great effort to brew tea next year but I'll now pass and just work on better soil amendments. I also agree on proper watering, WOW what a difference that can make, something so simple but at the same time so important to do right. I actually started using a wicking system for my seed starts indoors with half gallon containers and it works so well I can now start my peppers and tomatoes a month later because they grow so much faster given ideal watering conditions. Thanks for the work, going to watch many more of your videos over the next few weeks.
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how do u feel about a product called myke? what are your thoughts about adding benifical fungi directly to roots?
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Interesting video.
What do you think of aact as a pest control product?
Also I know from experience if your root development isn't perfect it helps the plant with deficiencies and getting established. -
This video changed my mind regarding using compost tee. I agree, that tee will not replace good soil. If you want compost tee results, just spread some compost on top of the soil.
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Well it's hard to disagree with that logic...
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I never used compost tea. To me it seems more hype. Building soil from scratch and use warm castings. Is the best way. I also check my soil yearly. Your correct people have no idea what they are brewing.
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thanks for all the testing and providing us access to your investigative results. i was hoping to at least see some demo (as in batches of plants grown with the different concoctions because most of us are visual and tend to fall asleep when fed an endless stream of alphanumeric data) as well as with the synthetic fertilizer and with the straightforward compost application. that said, you saved me a lot of money i was about to throw away ! thanks :-)
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Does this guy work at fertilizer inc? He may run the corporation.
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thanks for taking the time
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Results will vary depending on the compost source imo. If you are using a steer or chicken manure in your compost, then I would say you will raise your risk of pathogens and risk of E coli. Vegan sourced composts should not have these variables. The majority of AACT I brew uses humus or premium vegan fed worm castings as the base of the brew outside of carb sources. Carb sources will play a major role as well, depending what monosaccharide or polysaccharides are available to the colonies to feed on. The types of beneficial bacteria and fungus are vast and from what I have learned will have different effects from different plant types. Glomus, rhizopgon, bacillus, trichoderma, scleroderma, suillus, laccaria, pisolithus are some of the different bacteria and fungus that I would have been curious to see CFU and propagules per cc counts to see what kind of biodiversity and numbers in testing, not to mention the nematode and protozoa content. The length of brew time will shrink biodiversity but increase population size of certain colonies that are more dominant. In my experience, microbial and fungal inoculation to soil plays a big difference in taste, yield, essential oil production, nutrient uptake and plant health. These break down complex compounds for better biological assimilation, and having higher strength in numbers to fight off pathogens and unwanted bacterias and fungus in the soil. Foliar feeding produces a biofilm that protects in the same way and can hinder downy mold hypae from spreading and keep away some hard and soft bodied pests (bacillus thuringiensis "BT" that we know kills caterpillars). Steeping compost without air will produce anaerobic colonies which may have bad numbers of the wrong bacteria and I would not suggest using that method. I am no mycologist, I manage a chain of hydroponic stores and have been gardening for 10 years and I am just speaking from the experience I have.
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This video is more about theory jargon than actual gardening. One can establish a million theories as to why this and that "won't work" but actual trial and error provides "the science" you seek.
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You got to love this guy. A complete nobody from Alberta consistently contradicting research that has been done by people who actually know what they are doing and have the credentials to back it up. What a joke.
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