Farming
Copper (& brass) vs iron
Winding a copper (or brass) wire around a 6 ft stick in the ground (from bottom clockwise in NA, counter if SA) may provide over 200 ft of improved crop yield. Using noniron tools may help as well.
cultivateelevate.com (look for electroculture)
Leela quantum
Using Leela quantum plates or pendants with seeds & plants may significantly improve growth for some.
Infopathy
Using Infopathy to magnetically treat water with nutrients appears to improve plant growth for some.
Biochar & zeolite
Biochar & zeolite are used for binding heavy metal contaminants in the soil or for zeolite also in the body. In studies on different plant & grass species they each improve the growth of different plant species like grasses that have an affinity for taking up & are used to remove heavy metals from the soil.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7997912/
Cardboard
Cardboard is often used by farmers on their fields to suppress weeds with little extra effort. They can plant through little holes they make in the cardboard, and the cardboard mulches into the soil over time & is topped by a fresh layer once holes in coverage start to show.
