South pole magnetized water will increase the germination rate as will magnetizing the seeds. The effects are more pronounced in some crops, but apply to all of them. Effectively magnetizing large quantities of seeds would require seed magnetizers like the ones Davis and Rawls invented 40 years ago. As far as I know they aren't available now. A farmer who only has a small number of acres, on the other hand, can magnetize seeds for some plants that grow large like watermelons, tomatoes, etc., with magnets. Davis and Rawls used a biomagnetic tape for this. You can put hundreds of tomato seeds, for example, on just one foot of this tape. It's very cost effective.
Magnetizing water is very cost effective too. Magnets can be attached to irrigation hoses and they will magnetize the water as it passes through their magnetic field. The water will speed germination and increase growth in the crop. A simple experiment will show that.
Here is another pdf on humic substances. This one consists of chapter summaries of a book about humic substances titled, Humic, Fulvic and Microbial Balance: Organic Soil Conditioning
. This quote is from page 27. "Fulvic acids, for example, have an influence on water in that the nuclei of atoms within the water are charged or magnetized; thus, minerals and compounds are involved in a specific magnetic configuration, assisting in the informational message to the plant's DNA."