Subject: Would the zinc in soil be attracted to a magnet planted in the soil?

I dd a science fair project and now that I think of it, my conclusion may not be 
correct.  I planted some plants and planted anmagnet directly under the seed of 
half of them.  I observed and recorded the growth and discovered that the magnet 
tray's plants grew more numerously, faster, and developed faster(I tested spring 
peas, bush green snapbeans, and lima beans and none of the lima beans grew).  My 
conclusion was that the magnets attracted minerals that help the plants grow 
like zinc was a major one that they needed.  I also placed a magnet in the soil 
and washed it off and patted it dry to see if there were minerals attracted to 
magnets in the soil and there were some particles in many forms still attached 
to the magnets: orange metallicy, small pebbles with sparkles, ans even one in 
the form of a small hair.  Was my conclusion correct, partially correct, or 
incorrect?  Am I on the right track?  Do you have any advice?  Thanks!

Re: Would the zinc in soil be attracted to a magnet planted in the soil?