Looking for a more sustainable way to feed the world, I believe aquaculture, integrated systems and aquaponics have a lot of potential and might be a part of the solution.
Ted Talk - The case for fish farming - Mike Velings (aqua-spark.nl)
Knowledge Page Lea Pauzner
Nutrients deficiencies in plants
Remedies and where to buy them (old)
By the past, we experienced iron deficiency in our system. We found a solution in adding chelated iron powder. Since then, we are facing other nutrients deficiencies from time to time (and we can...