In the book it indicates there is a detailed video on how to make the irrigation system but I cannot find it on here. We'd really like to make it but it is difficult to figure out how to make it. Would really appreciate any help on determining the right sized barrels, pump, motor, and putting it together. We have a 5,000 sq ft of growing space so it is much smaller than a 1 hectare farm.
I grow about 3,000 square feet so similar size. I have no electricity at my garden so no pumps. We do have an irrigation well, and my solution is to use a Venturi injector. Mazzei makes good quality injectors: https://mazzei.net/products/venturi-injectors/ The injector sucks up the JMS/JLF from a bucket, and mixes it into the clean irrigation water. Very simple