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MicrogreenFarm Blog

Water Use in Food Production - Turning Things Upside Down

11/12/2015

2 Comments

 
PictureSIP wick in water tank below growing tray
We introduced our new bottom watered SIP Micro Farm in a blog yesterday, showing the advantages of bottom watering on plant growth. We developed the system to solve a recurring problem with introducing micro farming to people with no experience. Water amount is a critical to success, and it can be difficult to gauge how much water to add in a growing tray by itself. The new SIP system solves this by taking all the guesswork out of watering your micro plants.

While undergoing development we often wondered just how our micro plant production would compare to conventional agriculture. It is a point of great concern that agriculture takes up approximately 70% of the worlds water consumption, and in the US it is an even higher 80%. This point hit home as we watched the unfolding drama of being trapped on Mars without fresh food in the recent movie "The Martian".

Knowing that our micro plants are extremely fast growing (7-30 days depending on crop) and hyper packed with nutrition (USDA research), we thought it might be interesting to conduct an experiment to figure out just how productive our SIP MicroFarm system is. Note that in the USDA research, the amounts of key nutrients contained in the microgreens studied were 4 to 40 times greater than in mature vegetables.

Picture
normal grow tray being top watered on left contrasts with SIP bottom watered unit on right
For our experiment, we grew snow peas for 8 days. We measured the water used to grow the peas, and it came out to approximately 8 oz. Our harvest yielded 1.5oz of delicious snow pea shoots. When you do the math, it calculates to taking less than a gallon of water to grow a pound of snow peas shoots!

Water Required to produce one pound of California foods 
(University of California Agricultural Extension, working with livestock farm advisors)
tomatoes & lettuce                       23 gallons 
potatoes                                         24 gallons
carrots                                           33 gallons
apples                                             49 gallons
chicken                                        815 gallons
beef                                          5,214 gallons

Now consider that these pea shoots have 7 times more Vitamin C than blueberries, 8 times more folic acid than bean sprouts, and 4 times more Vitamin A than tomatoes, and you can see why we are excited by these results. Our initial experiment has the potential to turn things upside down!
2 Comments
Margo link
11/13/2015 09:13:16 am

Excellent article! I have been growing both my microgreens and my regular double-bucket crops (tomatoes, kale, potatoes) using sub- watering. I agree completely with your findings- excellent growth and production with a fraction of the water.

Reply
Alan
11/13/2015 09:42:58 am

Margo,

Thanks for the comment ... had been playing with this for quite some time and I concur fully with your experience ... let's hope more people will find success !!!

Reply



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    Urbaform

    Urbaform is a technology integrator and developer specializing in food production in the urban environment ...

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